Open Sound System

by **wwmm** » Tue Dec 28, 2010 11:19 pm

No it can't, but if I don't make a seek the stereo file plays without problems(and in only 2 channels as expected)

by **igorzwx** » Tue Dec 28, 2010 11:26 pm

wwmm wrote:No it can't, but if I don't make a seek the stereo file plays without problems(and in only 2 channels as expected)

If you make "a seek", dbus (libpulse) might be involved.
If it has something to do with dbus, it might be a bug in dbus.
I have already noticed some strange problems with video playback, similar to this one:
http://ubuntuforums.org/showthread.php?t=652941
On another computer with the same software installed (except for hardware related things) no problems at all.
Since libpulse is not installed (on both computers), it might be a kind of dbus/hardware related bug.

by **wwmm** » Wed Dec 29, 2010 12:10 am

It is possible, but as my 3g internet is very very slow in last days I will have to wait till I'm able to download the source code of Mplayer and to compile it without libpulse(Though I think I have compiled xine a few months ago without libpulse and the problem persisted). In the meantime I decided to do some tests enabling the option detect_trace in the file osscore.conf:

- That's what appears in dmesg when no file is playing:

Code: Select all: Dec 28 21:13:46 wwmm kernel: oss_envy24ht 0000:03:05.0: PCI INT A disabled Dec 28 21:13:47 wwmm kernel: oss_envy24ht 0000:03:05.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20 Dec 28 21:13:47 wwmm kernel: Entered Envy24HT probe routine Dec 28 21:13:47 wwmm kernel: Device found at I/O e800, e400 Dec 28 21:13:47 wwmm kernel: CCS base e801/e800 Dec 28 21:13:47 wwmm kernel: MT base e401/e400 Dec 28 21:13:47 wwmm kernel: Card id 'VIA Vinyl Tremor Audio' Dec 28 21:13:47 wwmm kernel: Installing AC97 mixer Dec 28 21:13:47 wwmm kernel: AC97 codec ID=0x56494170 ('VIA70') Dec 28 21:13:47 wwmm kernel: Detected AC97 codec: VT1612A Dec 28 21:13:47 wwmm kernel: AC97 codec capabilities 6d50 Dec 28 21:13:47 wwmm kernel: Dedicated Mic PCM in channel 0 Dec 28 21:13:47 wwmm kernel: Modem Line Codec support 0 Dec 28 21:13:47 wwmm kernel: Bass&Treble control 0 Dec 28 21:13:47 wwmm kernel: Simulated stereo 0 Dec 28 21:13:47 wwmm kernel: Headphone out support 1 Dec 28 21:13:47 wwmm kernel: Loudness support 0 Dec 28 21:13:47 wwmm kernel: 18bit DAC resolution 1 Dec 28 21:13:47 wwmm kernel: 20bit DAC resolution 0 Dec 28 21:13:47 wwmm kernel: 18bit ADC resolution 1 Dec 28 21:13:47 wwmm kernel: 20bit ADC resolution 0 Dec 28 21:13:47 wwmm kernel: 3D enhancement technique: 1b Dec 28 21:13:47 wwmm kernel: AC97 v2.1 multi slot support 0 Dec 28 21:13:47 wwmm kernel: AC97 v2.1 surround DAC support 0x7 Dec 28 21:13:47 wwmm kernel: Create instance 1 Dec 28 21:13:47 wwmm kernel: vmix_masterdev=0 Dec 28 21:13:47 wwmm kernel: vmix_inputdev=4 Dec 28 21:13:47 wwmm kernel: vmix_rate=48000 Dec 28 21:13:47 wwmm kernel: Dec 28 21:13:47 wwmm kernel: Check masterdev eng=0/VIA Vinyl Tremor Audio front out Dec 28 21:13:47 wwmm kernel: Vmix masterdev=0 Dec 28 21:13:47 wwmm kernel: oss_audio_open_engine(0, mode=0x2) Dec 28 21:13:47 wwmm kernel: oss_audio_open_engine(4, mode=0x1) Dec 28 21:13:47 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 21:13:47 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 21:13:47 wwmm kernel: Expand factor was = 1024 (1.00) Dec 28 21:13:47 wwmm kernel: Expand factor inverted to = 1024 (1.00) Dec 28 21:13:47 wwmm kernel: No format conversions needed Dec 28 21:13:47 wwmm kernel: Master dev 4 is OK Dec 28 21:13:47 wwmm kernel: usbcore: registered new interface driver oss_usb Dec 28 21:13:47 wwmm kernel: oss_cdev_open(2): mixer, class=6, instance=0 Dec 28 21:13:47 wwmm kernel: oss_cdev_open(2): mixer, class=6, instance=0 Dec 28 21:13:47 wwmm kernel: oss_cdev_open(0): sndstat, class=0, instance=0 Dec 28 21:13:47 wwmm kernel: oss_cdev_open(2): mixer, class=6, instance=0 Dec 28 21:13:47 wwmm kernel: oss_cdev_open(2): mixer, class=6, instance=0 Dec 28 21:13:47 wwmm kernel: oss_cdev_open(2): mixer, class=6, instance=0 Dec 28 21:16:43 wwmm kernel: oss_cdev_open(2): mixer, class=6, instance=0 Dec 28 21:16:43 wwmm kernel: oss_cdev_open(3): oss/oss_envy24ht0/mix0, class=6, instance=0

- These lines appears when I'm playing a stereo file with vmix enabled and set to stereo:

Code: Select all: Dec 28 21:20:11 wwmm kernel: oss_cdev_open(4): oss/oss_envy24ht0/pcm0, class=12, instance=0 Dec 28 21:20:11 wwmm kernel: oss_audio_open_devfile(0, mode=0x2, excl=0) Dec 28 21:20:11 wwmm kernel: oss_audio_open_engine(5, mode=0x2) Dec 28 21:20:11 wwmm kernel: oss_audio_open_engine(0, mode=0x2) Dec 28 21:20:11 wwmm kernel: oss_audio_open_engine(4, mode=0x1) Dec 28 21:20:11 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 21:20:11 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 21:20:11 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 21:20:11 wwmm kernel: Expand factor was = 1024 (1.00) Dec 28 21:20:11 wwmm kernel: Expand factor inverted to = 1024 (1.00) Dec 28 21:20:11 wwmm kernel: No format conversions needed Dec 28 21:20:11 wwmm kernel: Setting up format conversions for device 5 Dec 28 21:20:11 wwmm kernel: Speed 44100->48000 Dec 28 21:20:11 wwmm kernel: Channels 2->2 Dec 28 21:20:11 wwmm kernel: Format 10/16(LE)->10/16(LE) Dec 28 21:20:11 wwmm kernel: Expand = 1114 (1.08) Dec 28 21:20:11 wwmm kernel: Convert = 00000001 / CNV_SRC Dec 28 21:20:11 wwmm kernel: Dec 28 21:20:11 wwmm kernel: Only SRC

- These when I set vmix to Multich and I don't have any errors:

Code: Select all: Dec 28 21:22:36 wwmm kernel: oss_cdev_open(4): oss/oss_envy24ht0/pcm0, class=12, instance=0 Dec 28 21:22:36 wwmm kernel: oss_audio_open_devfile(0, mode=0x2, excl=0) Dec 28 21:22:36 wwmm kernel: oss_audio_open_engine(5, mode=0x2) Dec 28 21:22:36 wwmm kernel: oss_audio_open_engine(0, mode=0x2) Dec 28 21:22:36 wwmm kernel: oss_audio_open_engine(4, mode=0x1) Dec 28 21:22:36 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 21:22:36 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 21:22:36 wwmm kernel: Enabling multi channel play mode, 6 hw channels Dec 28 21:22:36 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 21:22:36 wwmm kernel: Expand factor was = 1024 (1.00) Dec 28 21:22:36 wwmm kernel: Expand factor inverted to = 1024 (1.00) Dec 28 21:22:36 wwmm kernel: Setting up format conversions for device 0 Dec 28 21:22:36 wwmm kernel: Speed 48000->48000 Dec 28 21:22:36 wwmm kernel: Channels 2->6 Dec 28 21:22:36 wwmm kernel: Format 1000/32(LE)->1000/32(LE) Dec 28 21:22:36 wwmm kernel: Expand = 3072 (3.00) Dec 28 21:22:36 wwmm kernel: Convert = 00000040 / CNV_MULT Dec 28 21:22:36 wwmm kernel: Dec 28 21:22:36 wwmm kernel: Will use the default converter Dec 28 21:22:36 wwmm kernel: Setting up format conversions for device 5 Dec 28 21:22:36 wwmm kernel: Speed 44100->48000 Dec 28 21:22:36 wwmm kernel: Channels 2->2 Dec 28 21:22:36 wwmm kernel: Format 10/16(LE)->10/16(LE) Dec 28 21:22:36 wwmm kernel: Expand = 1114 (1.08) Dec 28 21:22:36 wwmm kernel: Convert = 00000001 / CNV_SRC Dec 28 21:22:36 wwmm kernel: Dec 28 21:22:36 wwmm kernel: Only SRC Dec 28 21:22:36 wwmm kernel: oss_cdev_open(4): oss/oss_envy24ht0/pcm0, class=12, instance=0 Dec 28 21:22:36 wwmm kernel: oss_audio_open_devfile(0, mode=0x2, excl=0) Dec 28 21:22:36 wwmm kernel: oss_audio_open_engine(5, mode=0x2) Dec 28 21:22:36 wwmm kernel: oss_audio_open_engine(0, mode=0x2) Dec 28 21:22:36 wwmm kernel: oss_audio_open_engine(4, mode=0x1) Dec 28 21:22:36 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 21:22:36 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 21:22:36 wwmm kernel: Enabling multi channel play mode, 6 hw channels Dec 28 21:22:36 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 21:22:36 wwmm kernel: Expand factor was = 1024 (1.00) Dec 28 21:22:36 wwmm kernel: Expand factor inverted to = 1024 (1.00) Dec 28 21:22:36 wwmm kernel: Setting up format conversions for device 0 Dec 28 21:22:36 wwmm kernel: Speed 48000->48000 Dec 28 21:22:36 wwmm kernel: Channels 2->6 Dec 28 21:22:36 wwmm kernel: Format 1000/32(LE)->1000/32(LE) Dec 28 21:22:36 wwmm kernel: Expand = 3072 (3.00) Dec 28 21:22:36 wwmm kernel: Convert = 00000040 / CNV_MULT Dec 28 21:22:36 wwmm kernel: Dec 28 21:22:36 wwmm kernel: Will use the default converter Dec 28 21:22:36 wwmm kernel: Setting up format conversions for device 5 Dec 28 21:22:36 wwmm kernel: Speed 44100->48000 Dec 28 21:22:36 wwmm kernel: Channels 2->2 Dec 28 21:22:36 wwmm kernel: Format 10/16(LE)->10/16(LE) Dec 28 21:22:36 wwmm kernel: Expand = 1114 (1.08) Dec 28 21:22:36 wwmm kernel: Convert = 00000001 / CNV_SRC Dec 28 21:22:36 wwmm kernel: Dec 28 21:22:36 wwmm kernel: Only SRC

- This is what happens when I start to seek:

Code: Select all: Dec 28 21:25:20 wwmm kernel: osscore: Output timed out on audio engine 5/'VIA Vinyl Tremor Audio front out (vmix)' (count=0) Dec 28 21:25:20 wwmm kernel: oss_cdev_open(4): oss/oss_envy24ht0/pcm0, class=12, instance=0 Dec 28 21:25:20 wwmm kernel: oss_audio_open_devfile(0, mode=0x2, excl=0) Dec 28 21:25:20 wwmm kernel: oss_audio_open_engine(5, mode=0x2) Dec 28 21:25:20 wwmm kernel: oss_audio_open_engine(0, mode=0x2) Dec 28 21:25:20 wwmm kernel: oss_audio_open_engine(4, mode=0x1) Dec 28 21:25:20 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 21:25:20 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 21:25:20 wwmm kernel: Enabling multi channel play mode, 6 hw channels Dec 28 21:25:20 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 21:25:20 wwmm kernel: Expand factor was = 1024 (1.00) Dec 28 21:25:20 wwmm kernel: Expand factor inverted to = 1024 (1.00) Dec 28 21:25:20 wwmm kernel: Setting up format conversions for device 0 Dec 28 21:25:20 wwmm kernel: Speed 48000->48000 Dec 28 21:25:20 wwmm kernel: Channels 2->6 Dec 28 21:25:20 wwmm kernel: Format 1000/32(LE)->1000/32(LE) Dec 28 21:25:20 wwmm kernel: Expand = 3072 (3.00) Dec 28 21:25:20 wwmm kernel: Convert = 00000040 / CNV_MULT Dec 28 21:25:20 wwmm kernel: Dec 28 21:25:20 wwmm kernel: Will use the default converter Dec 28 21:25:20 wwmm kernel: Setting up format conversions for device 5 Dec 28 21:25:20 wwmm kernel: Speed 44100->48000 Dec 28 21:25:20 wwmm kernel: Channels 2->2 Dec 28 21:25:20 wwmm kernel: Format 10/16(LE)->10/16(LE) Dec 28 21:25:20 wwmm kernel: Expand = 1114 (1.08) Dec 28 21:25:20 wwmm kernel: Convert = 00000001 / CNV_SRC Dec 28 21:25:20 wwmm kernel: Dec 28 21:25:20 wwmm kernel: Only SRC

- Here's what appear playing a stereo file with vmix disabled:

Code: Select all: Dec 28 21:29:34 wwmm kernel: oss_cdev_open(4): oss/oss_envy24ht0/pcm0, class=12, instance=0 Dec 28 21:29:34 wwmm kernel: oss_audio_open_devfile(0, mode=0x2, excl=0) Dec 28 21:29:34 wwmm kernel: Trying engine=0 Dec 28 21:29:34 wwmm kernel: oss_audio_open_engine(0, mode=0x2) Dec 28 21:29:34 wwmm kernel: Engine 0 opened Dec 28 21:29:34 wwmm kernel: Setting up format conversions for device 0 Dec 28 21:29:34 wwmm kernel: Speed 44100->44100 Dec 28 21:29:34 wwmm kernel: Channels 2->2 Dec 28 21:29:34 wwmm kernel: Format 10/16(LE)->1000/32(LE) Dec 28 21:29:34 wwmm kernel: Expand = 2048 (2.00) Dec 28 21:29:34 wwmm kernel: Convert = 01004000 / CNV_F16bit CNV_T32bit

- Playing a 6 channels dvd with vmix enabled and no noise:

Code: Select all: Dec 28 22:03:32 wwmm kernel: Will use the default converter Dec 28 22:03:32 wwmm kernel: No format conversions needed Dec 28 22:03:33 wwmm kernel: oss_cdev_open(4): oss/oss_envy24ht0/pcm0, class=12, instance=0 Dec 28 22:03:33 wwmm kernel: oss_audio_open_devfile(0, mode=0x2, excl=0) Dec 28 22:03:33 wwmm kernel: oss_audio_open_engine(5, mode=0x2) Dec 28 22:03:33 wwmm kernel: oss_audio_open_engine(0, mode=0x2) Dec 28 22:03:33 wwmm kernel: oss_audio_open_engine(4, mode=0x1) Dec 28 22:03:33 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 22:03:33 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 22:03:33 wwmm kernel: Enabling multi channel play mode, 6 hw channels Dec 28 22:03:33 wwmm kernel: Can't set speed: open_count 2, ratelock 0 Dec 28 22:03:33 wwmm kernel: Expand factor was = 1024 (1.00) Dec 28 22:03:33 wwmm kernel: Expand factor inverted to = 1024 (1.00) Dec 28 22:03:33 wwmm kernel: Setting up format conversions for device 0 Dec 28 22:03:33 wwmm kernel: Speed 48000->48000 Dec 28 22:03:33 wwmm kernel: Channels 2->6 Dec 28 22:03:33 wwmm kernel: Format 1000/32(LE)->1000/32(LE) Dec 28 22:03:33 wwmm kernel: Expand = 3072 (3.00) Dec 28 22:03:33 wwmm kernel: Convert = 00000040 / CNV_MULT Dec 28 22:03:33 wwmm kernel: Dec 28 22:03:33 wwmm kernel: Will use the default converter Dec 28 22:03:33 wwmm kernel: No format conversions needed

- And here the logs when a 6 channels dvd is played with vmix disabled and without noise:

Code: Select all: Dec 28 21:32:08 wwmm kernel: oss_cdev_open(4): oss/oss_envy24ht0/pcm0, class=12, instance=0 Dec 28 21:32:08 wwmm kernel: oss_audio_open_devfile(0, mode=0x2, excl=0) Dec 28 21:32:08 wwmm kernel: Trying engine=0 Dec 28 21:32:08 wwmm kernel: oss_audio_open_engine(0, mode=0x2) Dec 28 21:32:08 wwmm kernel: Engine 0 opened Dec 28 21:32:08 wwmm kernel: Setting up format conversions for device 0 Dec 28 21:32:08 wwmm kernel: Speed 48000->48000 Dec 28 21:32:08 wwmm kernel: Channels 6->6 Dec 28 21:32:08 wwmm kernel: Format 10/16(LE)->1000/32(LE) Dec 28 21:32:08 wwmm kernel: Expand = 2048 (2.00) Dec 28 21:32:08 wwmm kernel: Convert = 01004000 / CNV_F16bit CNV_T32bit

Nothing new appears together with the noise when playing a multichannels file(independently of vmix being enabled or disabled). What do you think guys?

by **igorzwx** » Wed Dec 29, 2010 12:54 am

I think that it might be difficult to localize the problem.
Multimedia apps in Arch Linux are fundamentally buggy.
For example, MPlayer cannot play FLACs encoded with the standard FLAC codec.
I have already recompiled mplayer-vaapi. It seems to play everything now.
pacman is also buggy.

by **wwmm** » Wed Dec 29, 2010 11:56 am

One question guys, in the error messages osscore says that the output timed out in audio engine 5, but when I run osstest the displayed number of audio engines goes from zero to 4. In ossinfo the devices index is also numbered from zero to 4. Where is this engine 5 displayed in the error logs? Or the part of the source code responsible for the log start to count the engines in the number 1?

by **igorzwx** » Wed Dec 29, 2010 12:45 pm

wwmm wrote:One question guys, in the error messages osscore says that the output timed out in audio engine 5, but when I run osstest the displayed number of audio engines goes from zero to 4. In ossinfo the devices index is also numbered from zero to 4. Where is this engine 5 displayed in the error logs? Or the part of the source code responsible for the log start to count the engines in the number 1?

It seems that I have 5 engines (numbered from 1 to 5):

Code: Select all: $ ossinfo -v9 Version info: OSS 4.2 (b 2003/201012180115) (0x00040100) GPL Platform: Linux/i686 2.6.36-ARCH #1 SMP PREEMPT Fri Dec 10 20:01:53 UTC 2010 Number of audio devices: 7 Number of audio engines: 11 Number of MIDI devices: 0 Number of mixer devices: 1 Device objects 0: osscore0 OSS core services 1: oss_hdaudio0 Intel HD Audio interrupts=576 (880) HD Audio controller Intel HD Audio Vendor ID 0x80862668 Subvendor ID 0x17c02017 Codec 0: AD1986A (0x11d41986/0x17c02017) Codec 1: Motorola3055 (0x10573055) 2: oss_usb0 USB audio core services MIDI devices (/dev/midi*) Mixer devices 0: High Definition Audio AD1986A (Mixer 0 of device object 1) Device file /dev/oss/oss_hdaudio0/mix0, Legacy device /dev/mixer0 Priority: 10 Caps: Device handle: PCI201717c0-0000:00:1b.0-mx01 Device priority: 10 Audio devices HD Audio play front /dev/oss/oss_hdaudio0/pcm0 (device index 0) Legacy device /dev/dsp0 Caps: DUPLEX TRIGGER MMAP Modes: IN/OUT Out engine 1: 0/HD Audio play front Available for use Engine 2: 7/HD Audio play front (vmix) Available for use Engine 3: 8/HD Audio play front (vmix) Available for use Engine 4: 9/HD Audio play front (vmix) Available for use Engine 5: 10/HD Audio play front (vmix) Available for use Input formats (0x00001010): AFMT_S16_LE - 16 bit signed little endian AFMT_S32_LE - 32 bit signed little endian Output formats (0x00001010): AFMT_S16_LE - 16 bit signed little endian AFMT_S32_LE - 32 bit signed little endian Device handle: PCI201717c0-0000:00:1b.0-au01 Related mixer dev: 0 Sample rate source: 0 Preferred channel configuration: Not indicated Supported number of channels (min - max): 2 - 8 Native sample rates (min - max): 8000 - 48000 (8000,11025,16000,22050,32000,44100,48000) HW Type: Not indicated. Minimum latency: Not indicated HD Audio play rear /dev/oss/oss_hdaudio0/pcm1 (device index 1) Legacy device /dev/dsp1 Caps: TRIGGER MMAP Modes: OUTPUT Out engine 1: 1/HD Audio play rear Available for use Input formats (0x00001010): AFMT_S16_LE - 16 bit signed little endian AFMT_S32_LE - 32 bit signed little endian Output formats (0x00001010): AFMT_S16_LE - 16 bit signed little endian AFMT_S32_LE - 32 bit signed little endian Device handle: PCI201717c0-0000:00:1b.0-au02 Related mixer dev: 0 Sample rate source: 0 Preferred channel configuration: Not indicated Supported number of channels (min - max): 2 - 2 Native sample rates (min - max): 8000 - 48000 (8000,11025,16000,22050,32000,44100,48000) HW Type: Not indicated. Minimum latency: Not indicated HD Audio play center/LFE /dev/oss/oss_hdaudio0/pcm2 (device index 2) Legacy device /dev/dsp2 Caps: TRIGGER MMAP Modes: OUTPUT Out engine 1: 2/HD Audio play center/LFE Available for use Input formats (0x00001010): AFMT_S16_LE - 16 bit signed little endian AFMT_S32_LE - 32 bit signed little endian Output formats (0x00001010): AFMT_S16_LE - 16 bit signed little endian AFMT_S32_LE - 32 bit signed little endian Device handle: PCI201717c0-0000:00:1b.0-au03 Related mixer dev: 0 Sample rate source: 0 Preferred channel configuration: Not indicated Supported number of channels (min - max): 2 - 2 Native sample rates (min - max): 8000 - 48000 (8000,11025,16000,22050,32000,44100,48000) HW Type: Not indicated. Minimum latency: Not indicated HD Audio play spdif-out /dev/oss/oss_hdaudio0/spdout0 (device index 3) Legacy device /dev/dsp3 Caps: TRIGGER MMAP Modes: OUTPUT Out engine 1: 3/HD Audio play spdif-out Available for use Input formats (0x00000410): AFMT_S16_LE - 16 bit signed little endian AFMT_AC3 - AC3 (Dolby Digital) encoded audio Output formats (0x00000410): AFMT_S16_LE - 16 bit signed little endian AFMT_AC3 - AC3 (Dolby Digital) encoded audio Device handle: PCI201717c0-0000:00:1b.0-au04 Related mixer dev: 0 Sample rate source: 0 Preferred channel configuration: Not indicated Supported number of channels (min - max): 2 - 2 Native sample rates (min - max): 44100 - 48000 (44100,48000) HW Type: Not indicated. Minimum latency: Not indicated HD Audio play modem /dev/oss/oss_hdaudio0/mdmout0 (device index 4) Legacy device /dev/dsp4 Caps: TRIGGER MMAP Modes: OUTPUT Out engine 1: 4/HD Audio play modem Available for use Input formats (0x00000010): AFMT_S16_LE - 16 bit signed little endian Output formats (0x00000010): AFMT_S16_LE - 16 bit signed little endian Device handle: PCI201717c0-0000:00:1b.0-au05 Related mixer dev: 0 Sample rate source: 0 Preferred channel configuration: Not indicated Supported number of channels (min - max): 1 - 1 Native sample rates (min - max): 8000 - 16000 (8000,9600,16000) HW Type: Not indicated. Minimum latency: Not indicated HD Audio rec rec-srcmic-mix /dev/oss/oss_hdaudio0/pcmin0 (device index 5) Legacy device /dev/dsp5 Caps: DUPLEX TRIGGER MMAP Modes: IN/OUT In engine 1: 5/HD Audio rec rec-srcmic-mix Available for use Engine 2: 7/HD Audio play front (vmix) Available for use Engine 3: 8/HD Audio play front (vmix) Available for use Engine 4: 9/HD Audio play front (vmix) Available for use Engine 5: 10/HD Audio play front (vmix) Available for use Input formats (0x00001010): AFMT_S16_LE - 16 bit signed little endian AFMT_S32_LE - 32 bit signed little endian Output formats (0x00001010): AFMT_S16_LE - 16 bit signed little endian AFMT_S32_LE - 32 bit signed little endian Device handle: PCI201717c0-0000:00:1b.0-au06 Related mixer dev: 0 Sample rate source: 0 Preferred channel configuration: Not indicated Supported number of channels (min - max): 2 - 2 Native sample rates (min - max): 8000 - 48000 (8000,11025,16000,22050,32000,44100,48000) HW Type: Not indicated. Minimum latency: Not indicated HD Audio rec modem /dev/oss/oss_hdaudio0/mdmin0 (device index 6) Legacy device /dev/dsp6 Caps: TRIGGER MMAP Modes: INPUT In engine 1: 6/HD Audio rec modem Available for use Input formats (0x00000010): AFMT_S16_LE - 16 bit signed little endian Output formats (0x00000010): AFMT_S16_LE - 16 bit signed little endian Device handle: PCI201717c0-0000:00:1b.0-au07 Related mixer dev: 0 Sample rate source: 0 Preferred channel configuration: Not indicated Supported number of channels (min - max): 1 - 1 Native sample rates (min - max): 8000 - 16000 (8000,9600,16000) HW Type: Not indicated. Minimum latency: Not indicated Nodes /dev/dsp -> /dev/oss/oss_hdaudio0/pcm0 /dev/dsp_in -> /dev/oss/oss_hdaudio0/pcm0 /dev/dsp_out -> /dev/oss/oss_hdaudio0/pcm0 /dev/dsp_ac3 -> /dev/oss/oss_hdaudio0/spdout0 /dev/dsp_mmap -> /dev/oss/oss_hdaudio0/pcm0 /dev/dsp_multich -> /dev/oss/oss_hdaudio0/pcm0

by **wwmm** » Wed Dec 29, 2010 1:12 pm

Ok, with ossinfo -v9 it is easier to understand. In my ossinfo -v9 output the engines are also numbered from 1 to 5:

Code: Select all: [wallace@wwmm ~]$ ossinfo -v9 Version info: OSS 4.2 (b 2003/201012281411) (0x00040100) OSS_HG Hg revision: changeset: 920:232d0de71550, tag: tip, date: Tue Nov 02 23:45:15 2010 +0200, summary: Misc changes to ossplay Platform: Linux/x86_64 2.6.36-ARCH #1 SMP PREEMPT Fri Dec 10 20:32:37 CET 2010 (wwmm) Number of audio devices: 5 Number of audio engines: 9 Number of MIDI devices: 0 Number of mixer devices: 1 Device objects 0: osscore0 OSS core services 1: oss_envy24ht0 VIA Vinyl Tremor Audio 2: oss_usb0 USB audio core services MIDI devices (/dev/midi*) Mixer devices 0: VIA Vinyl Tremor Audio (VT1612A (Mixer 0 of device object 1) Device file /dev/oss/oss_envy24ht0/mix0, Legacy device /dev/mixer0 Priority: 2 Caps: Device handle: PCI24031412-0000:03:05.0-mx01 Device priority: 2 Audio devices VIA Vinyl Tremor Audio front out /dev/oss/oss_envy24ht0/pcm0 (device index 0) Legacy device /dev/dsp0 Caps: DUPLEX TRIGGER MMAP Modes: IN/OUT Out engine 1: 0/VIA Vinyl Tremor Audio front out Available for use Engine 2: 5/VIA Vinyl Tremor Audio front out (vmix) Available for use Engine 3: 6/VIA Vinyl Tremor Audio front out (vmix) Available for use Engine 4: 7/VIA Vinyl Tremor Audio front out (vmix) Available for use Engine 5: 8/VIA Vinyl Tremor Audio front out (vmix) Available for use Input formats (0x00001000): AFMT_S32_LE - 32 bit signed little endian Output formats (0x00001000): AFMT_S32_LE - 32 bit signed little endian Device handle: PCI24031412-0000:03:05.0-au01 Related mixer dev: 0 Sample rate source: 0 Preferred channel configuration: STEREO Supported number of channels (min - max): 2 - 6 Native sample rates (min - max): 8000 - 192000 (8000,9600,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,176400,192000) HW Type: ANALOG_OUT Minimum latency: Not indicated VIA Vinyl Tremor Audio c/l out /dev/oss/oss_envy24ht0/pcm1 (device index 1) Legacy device /dev/dsp1 Caps: TRIGGER MMAP Modes: OUTPUT Out engine 1: 1/VIA Vinyl Tremor Audio c/l out Available for use Input formats (0x00001000): AFMT_S32_LE - 32 bit signed little endian Output formats (0x00001000): AFMT_S32_LE - 32 bit signed little endian Device handle: PCI24031412-0000:03:05.0-au02 Related mixer dev: 0 Sample rate source: 0 Preferred channel configuration: STEREO Supported number of channels (min - max): 2 - 2 Native sample rates (min - max): 8000 - 192000 (8000,9600,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,176400,192000) HW Type: ANALOG_OUT Minimum latency: Not indicated VIA Vinyl Tremor Audio side out /dev/oss/oss_envy24ht0/pcm2 (device index 2) Legacy device /dev/dsp2 Caps: TRIGGER MMAP Modes: OUTPUT Out engine 1: 2/VIA Vinyl Tremor Audio side out Available for use Input formats (0x00001000): AFMT_S32_LE - 32 bit signed little endian Output formats (0x00001000): AFMT_S32_LE - 32 bit signed little endian Device handle: PCI24031412-0000:03:05.0-au03 Related mixer dev: 0 Sample rate source: 0 Preferred channel configuration: STEREO Supported number of channels (min - max): 2 - 2 Native sample rates (min - max): 8000 - 192000 (8000,9600,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,176400,192000) HW Type: ANALOG_OUT Minimum latency: Not indicated VIA Vinyl Tremor Audio digital out /dev/oss/oss_envy24ht0/spdout (device index 3) Legacy device /dev/dsp3 Caps: TRIGGER MMAP Modes: OUTPUT Out engine 1: 3/VIA Vinyl Tremor Audio digital out Available for use Input formats (0x00001400): AFMT_AC3 - AC3 (Dolby Digital) encoded audio AFMT_S32_LE - 32 bit signed little endian Output formats (0x00001400): AFMT_AC3 - AC3 (Dolby Digital) encoded audio AFMT_S32_LE - 32 bit signed little endian Device handle: PCI24031412-0000:03:05.0-au04 Related mixer dev: 0 Sample rate source: 0 Preferred channel configuration: STEREO Supported number of channels (min - max): 2 - 2 Native sample rates (min - max): 8000 - 192000 (8000,9600,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,176400,192000) HW Type: DIGITAL_OUT Minimum latency: Not indicated VIA Vinyl Tremor Audio analog in /dev/oss/oss_envy24ht0/pcmin0 (device index 4) Legacy device /dev/dsp4 Caps: DUPLEX TRIGGER MMAP Modes: IN/OUT In engine 1: 4/VIA Vinyl Tremor Audio analog in Available for use Engine 2: 5/VIA Vinyl Tremor Audio front out (vmix) Available for use Engine 3: 6/VIA Vinyl Tremor Audio front out (vmix) Available for use Engine 4: 7/VIA Vinyl Tremor Audio front out (vmix) Available for use Engine 5: 8/VIA Vinyl Tremor Audio front out (vmix) Available for use Input formats (0x00001000): AFMT_S32_LE - 32 bit signed little endian Output formats (0x00001000): AFMT_S32_LE - 32 bit signed little endian Device handle: PCI24031412-0000:03:05.0-au05 Related mixer dev: 0 Sample rate source: 0 Preferred channel configuration: STEREO Supported number of channels (min - max): 1 - 2 Native sample rates (min - max): 8000 - 192000 (8000,9600,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,176400,192000) HW Type: ANALOG_IN Minimum latency: Not indicated Nodes /dev/dsp -> /dev/oss/oss_envy24ht0/pcm0 /dev/dsp_in -> /dev/oss/oss_envy24ht0/pcm0 /dev/dsp_out -> /dev/oss/oss_envy24ht0/pcm0 /dev/dsp_ac3 -> /dev/oss/oss_envy24ht0/spdout /dev/dsp_mmap -> /dev/oss/oss_envy24ht0/pcm0 /dev/dsp_multich -> /dev/oss/oss_envy24ht0/pcm0 /dev/dsp_spdifout -> /dev/oss/oss_envy24ht0/spdout

I think that the number 5 in my error messages:

Code: Select all: osscore: Output timed out on audio engine 5/'VIA Vinyl Tremor Audio front out (vmix)' (count=0)

is related to this line in ossinfo output:

Code: Select all: Engine 2: 5/VIA Vinyl Tremor Audio front out (vmix)

Comparing your ossinfo output with mine I noticed that my devices only accept the AFMT_S32_LE format as input, while yours accept the AFMT_S16_LE too. Is it normal that a soundcard only accepts the 32 bits format? Or there is a problem in my configuration?

by **igorzwx** » Wed Dec 29, 2010 1:33 pm

Format may depend on the particular driver. It is normal (in this sense). Nothing is perfect (especially drivers).
If your driver does not support 16bit, you may try Pertrov's pcm_conv viewtopic.php?f=3&t=3543&start=45#p15974
It is a kind of portable converter/resampler, it can also convert stereo to surround.

Code: Select all: $ pcm_conv -H Usage: pcm_conv <input file> [output file] [-c number of channels] [-b number of bits] [-f frequency] [-T trans] [-W win] [-n] [-i] [-h|-H] Options: input file Input WAVE file output file Output WAVE file (by default is "convert.wav") -c Number of output channels: 1 - mono 2 - stereo 3 - 2/1 surround 4 - 2/2 quadro 5 - 3/2 surround 6 - 3/2+SW dolby -b Number of output bits: 8, 16 .. 32, 32f or 64f -f Output sample rate (in Hz). Tested: from 6000 to 192000 -T Transform type: dct, fft (default: dct) -W Window type: vorbis, hanning (default: vorbis) -n Show internal information -i Show wide modules information -h Show this message -H Show all help info

by **wwmm** » Wed Dec 29, 2010 1:40 pm

Looking at one of my previous posts where I pasted the logs with the option detect_trace enabled I realized that the driver is converting the 16 bits format of the input file to the 32 bits input format of the soundcard:

Code: Select all: Dec 28 21:29:34 wwmm kernel: oss_cdev_open(4): oss/oss_envy24ht0/pcm0, class=12, instance=0 Dec 28 21:29:34 wwmm kernel: oss_audio_open_devfile(0, mode=0x2, excl=0) Dec 28 21:29:34 wwmm kernel: Trying engine=0 Dec 28 21:29:34 wwmm kernel: oss_audio_open_engine(0, mode=0x2) Dec 28 21:29:34 wwmm kernel: Engine 0 opened Dec 28 21:29:34 wwmm kernel: Setting up format conversions for device 0 Dec 28 21:29:34 wwmm kernel: Speed 44100->44100 Dec 28 21:29:34 wwmm kernel: Channels 2->2 Dec 28 21:29:34 wwmm kernel: Format 10/16(LE)->1000/32(LE) Dec 28 21:29:34 wwmm kernel: Expand = 2048 (2.00) Dec 28 21:29:34 wwmm kernel: Convert = 01004000 / CNV_F16bit CNV_T32bit

So everything must be ok.

by **igorzwx** » Wed Dec 29, 2010 1:52 pm

Yes. If this conversion does not produce artefacts such as noise, harmonic distortions, and the like.

by **cesium** » Wed Dec 29, 2010 3:20 pm

Yea, it's normal for envy24(ht) cards to do only 32bits. Anyhow, I rather doubt it's the conversion's fault here [we'd have a lot more complaints from envy24(ht) owners] - and you can convert multich files to 32bits with sox [sox (inputfile) -4 (outputfile)], and check if they still have the noise (I think they will) to test this.

I'd like to clarify something: You said you could hear the noise even without vmix, but only in multichannel, right? I guess you only tested 6 channels, right? What happens if you try a 4ch file like this (make sure vmix is off and/or use ossplay -R to test)? Play it in 'ossplay -R (etc)'.

by **wwmm** » Wed Dec 29, 2010 5:34 pm

Yes, I can hear noise without vmix when doing a seek in multichannel files. If no seek is done the file plays without noise.

I tried to play your file with ossplay -R but it failed:

Code: Select all: /dev/dsp doesn't support this audio format (10/1000).

I was able to play it without the -R option and with mplayer. In both programs there was no noise. This doesn't surprises me because it is impossible to seek in a file so small, and without doing that all files play well here, including mines.

Anyway, one thing caught my attention when playing your file. The sound corresponding to "surround" was played in one of the channels named by ossxmix as "c/l" and not in the one named "side" as I was expecting(I noticed this listening to the sound and watching the level meters in ossxmix, the options mix-lfe2front and mix-rear2front were disabled). The sound corresponding to "center" played in the expected channel. Thinking about that I remember that sometimes(both in mplayer and vlc) the channels were messed when I paused the players or entered fullscreen. The side channels suddenly exchanged place with the "c/l" ones. At that time vmix was always enabled, I don't know if this happens without vmix. I will try to do some tests...

What do you think?

by **cesium** » Wed Dec 29, 2010 5:45 pm

wwmm wrote:This doesn't surprises me because it is impossible to seek in a file so small, and without doing that all files play well here, including mines.

Sorry. You can use sox to create a 4 channel file: 'sox (inputfile) -c 4 (outputfile)'. I wonder if this issue is localized to 6ch files (there's a little special code in the driver for those) or all multichannel use.

wmmm wrote:Anyway, one thing caught my attention when playing your file. The sound corresponding to "surround" was played in one of the channels named by ossxmix as "c/l" and not in the one named "side" as I was expecting(I noticed this listening to the sound and watching the level meters in ossxmix, the options mix-lfe2front and mix-rear2front were disabled). The sound corresponding to "center" played in the expected channel.

Hmm.. is the physical connection right? Or maybe changing mixer settings can correct this?

wwmm wrote:Thinking about that I remember that sometimes(both in mplayer and vlc) the channels were messed when I paused the players or entered fullscreen. The side channels suddenly exchanged place with the "c/l" ones. At that time vmix was always enabled, I don't know if this happens without vmix. I will try to do some tests...

Possibly this is related to messed channels issue?

by **igorzwx** » Wed Dec 29, 2010 6:04 pm

The wave "4ch.wav" is "Uncompressed 16-bit PCM audio". Right?
"ossplay -R" should not play it, because this format is not supported, according to "ossinfo -v9". Right?

If I am not mistaken, noise is somehow caused by "conversion+seeking".
The trouble might be caused by dbus, or libpulse, or other things which may have nothing to do with OSS4.
It might be a new bug in dbus (it was updated not long ago), or old bugs in MPlayer, or else.
There is the "ultimate documentation" for MPlayer, I presume. It may help to find out how "seek" works in MPlayer.

cesium wrote:Possibly this is related to messed channels issue?

The real reason to the problem is that mplayer causes frequent
underruns. I don't remember exactly what problem was but I recall
mplayer doesn't use normal blocking writes or select/poll to syncronize
with audio. Instead it calls SNDCTL_DSP_GETOSPACE to guess how long it
should wait and then it waits by calling usleep() (or was it select()
with a timeout). This is doomed to fail because the sound card works
asynchronously with system timer interrupts that controls usleep(). This
should be fixed instead of adding nasty workarounds to OSS. http://mailman.opensound.com/pipermail/ ... 00846.html

MPlayer is buggy (especially in Arch Linux). It makes sense to recompile mplayer-vaapi (it seems to work better).
pacman is also buggy, and, therefore, you should be careful about dependencies.

In fact, there is not any reliable "open source" player for OSS4 (except, perhaps, for old xmms).
There is also Petrov's pcm_play (it supports seeking) and plugin for the Russian Ultimate player (Petrov's magic tools are not open source, but they are free).

The Russian Ultimate player is already infected with PulseAudio and included into the "community repository" of Arch Linux

Code: Select all: # $Id: PKGBUILD 36041 2010-12-25 20:18:47Z lfleischer $ # Maintainer: Lukas Fleischer <archlinux at cryptocrack dot de> # Contributor: Alexey Yakovenko <waker@users.sourceforge.net> pkgname=deadbeef pkgver=0.4.4 pkgrel=2 pkgdesc='An audio player for GNU/Linux based on GTK2.' arch=('i686' 'x86_64') url='http://deadbeef.sourceforge.net' license=('GPL2') depends=('gtk2' 'libsamplerate' 'alsa-lib') makedepends=('gtk2' 'libsamplerate' 'libvorbis' 'libmad' 'flac' 'curl' 'alsa-lib' 'wavpack' 'libsndfile' 'libcdio' 'libcddb' 'ffmpeg' 'libx11' 'faad2' 'zlib' 'intltool' 'pkgconfig' 'libpulse') optdepends=('libvorbis: for Ogg Vorbis playback' 'libmad: for MP1/MP2/MP3 playback' 'flac: for FLAC playback' 'curl: for Last.fm scrobbler, SHOUTcast, Icecast, Podcast support' 'wavpack: for WavPack playback' 'libsndfile: for Wave playback' 'libcdio: audio cd plugin' 'libcddb: audio cd plugin' 'ffmpeg: for WMA, AA, OMA, AC, etc.' 'libmms: for MMS protocol support' 'faad2: for AAC/MP4 support' 'dbus: for OSD notifications support' 'pulseaudio: for PulseAudio output plugin' 'libx11: for global hotkeys plugin') options=('!libtool') install='deadbeef.install' source=("http://downloads.sourceforge.net/project/${pkgname}/${pkgname}-${pkgver}.tar.bz2") md5sums=('546e63d456d6a5625461019b15501e38') build() { cd "${srcdir}/${pkgname}-${pkgver}" ./configure --prefix=/usr make } package () { cd "${srcdir}/${pkgname}-${pkgver}" make prefix="${pkgdir}/usr" install }

by **wwmm** » Wed Dec 29, 2010 6:15 pm

Hi,

From one stereo mp3 I created 2 files using sox. One with 4 channels and other with 6. The one with 4 channels didn't produced any noise but with the 6 channels file there was a lot. I repeated the "seek" test many times and I have no doubts, it is a problem with six channels files(though I still don't understand why vmix set to Multich produce noise with stere files...).

About the messed up channel, the physical connection is right. Unfortunatly it doesn't seem to be possible to correct with the mixer settings, as the only options present are mix-lfe2front and mix-rear2front. Thereś nothing to exchange side channels with "c/l". Maybe using vmixctl...

I have a test file similar to the one you passed me but with 6 channels instead of 4. And with it things are worst, the center sound appears in the side channels and in the side ones appear in "c/l"

Open Sound System

Noise in ice1724 based soundcard

Re: Noise in ice1724 based soundcard

Re: Noise in ice1724 based soundcard

Re: Noise in ice1724 based soundcard

Re: Noise in ice1724 based soundcard

Re: Noise in ice1724 based soundcard

Re: Noise in ice1724 based soundcard

Re: Noise in ice1724 based soundcard

Re: Noise in ice1724 based soundcard

Re: Noise in ice1724 based soundcard

Re: Noise in ice1724 based soundcard

Re: Noise in ice1724 based soundcard

Re: Noise in ice1724 based soundcard

Re: Noise in ice1724 based soundcard

Re: Noise in ice1724 based soundcard

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