With VMIX audio output seems like it is being played very slowly, more of a variable
frequency buzzing with clicks, with VMIX disabled through ossmix, the audio
is played at almost the correct speed but has replay echoes and crackling.
Moving the mouse, or accessing the disk (find, ls, etc) pretty much corrects
the audio speed, removes the replay echoes, leaving some clicks. The audio
output then reverts to above broken modes when mouse movement/disk access stops.
ossplay'ing the same audio test song generates the same number of interrupts
regardless of whether running in broken mode or almost correct, with find(1)
accessing the disk.
Adjusting vmix0-src, vmix0-channels, max_intrate, src_quality and dma_buffsize
doesn't appear to make any difference.
Neither does changing kernel clocksource and noapic, etc.
Any ideas anyone ?
thanks.
ossinfo -v3:
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Version info: OSS 4.2 (b 2000/200909171030) (0x00040100) OSS_HG
Platform: Linux/i686 2.6.26-2-686 #1 SMP Sun Jun 21 04:57:38 UTC 2009 (debian-5.0)
Number of audio devices: 4
Number of audio engines: 8
Number of MIDI devices: 0
Number of mixer devices: 1
Device objects
0: osscore0 OSS core services
1: oss_hdaudio0 nVidia HD Audio interrupts=31503 (36026)
HD Audio controller nVidia HD Audio
Vendor ID 0x10de0ac0
Subvendor ID 0x10decb84
Codec 0: Unknown (0x14f15051/0x18951114)
2: oss_usb0 USB audio core services
MIDI devices (/dev/midi*)
Mixer devices
0: High Definition Audio 0x14f1505 (Mixer 0 of device object 1)
Device file /dev/oss/oss_hdaudio0/mix0, Legacy device /dev/mixer0
Priority: 10
Caps:
Device handle: PCIcb8410de-0000:00:08.0-mx01
Device priority: 10
Audio devices
HD Audio play pcm1 /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 pcm1
Busy (OUT) label 'VMIX'
Engine 2: 4/HD Audio play pcm1 (vmix)
Busy (OUT) by PID 3413 / ossplay songname 'test_tune.wav' label 'ossplay'
Engine 3: 5/HD Audio play pcm1 (vmix)
Available for use
Engine 4: 6/HD Audio play pcm1 (vmix)
Available for use
Engine 5: 7/HD Audio play pcm1 (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: PCIcb8410de-0000:00:08.0-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): 44100 - 192000 (44100,48000,96000,192000)
HW Type: Not indicated.
Minimum latency: Not indicated
HD Audio play pcm2 /dev/oss/oss_hdaudio0/pcm1 (device index 1)
Legacy device /dev/dsp1
Caps: TRIGGER MMAP
Modes: OUTPUT
Out engine 1: 1/HD Audio play pcm2
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: PCIcb8410de-0000:00:08.0-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): 44100 - 192000 (44100,48000,96000,192000)
HW Type: Not indicated.
Minimum latency: Not indicated
HD Audio play spdifout /dev/oss/oss_hdaudio0/spdout0 (device index 2)
Legacy device /dev/dsp2
Caps: TRIGGER MMAP
Modes: OUTPUT
Out engine 1: 2/HD Audio play spdifout
Available for use
Input formats (0x00001410):
AFMT_S16_LE - 16 bit signed little endian
AFMT_AC3 - AC3 (Dolby Digital) encoded audio
AFMT_S32_LE - 32 bit signed little endian
Output formats (0x00001410):
AFMT_S16_LE - 16 bit signed little endian
AFMT_AC3 - AC3 (Dolby Digital) encoded audio
AFMT_S32_LE - 32 bit signed little endian
Device handle: PCIcb8410de-0000:00:08.0-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): 44100 - 96000 (44100,48000,96000)
HW Type: Not indicated.
Minimum latency: Not indicated
HD Audio rec fp-mic /dev/oss/oss_hdaudio0/pcmin0 (device index 3)
Legacy device /dev/dsp3
Caps: DUPLEX TRIGGER MMAP
Modes: IN/OUT
In engine 1: 3/HD Audio rec fp-mic
Busy (IN) label 'VMIX_IN'
Engine 2: 4/HD Audio play pcm1 (vmix)
Busy (OUT) by PID 3413 / ossplay songname 'test_tune.wav' label 'ossplay'
Engine 3: 5/HD Audio play pcm1 (vmix)
Available for use
Engine 4: 6/HD Audio play pcm1 (vmix)
Available for use
Engine 5: 7/HD Audio play pcm1 (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: PCIcb8410de-0000:00:08.0-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 - 96000 (44100,48000,96000)
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
ossmix
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Selected mixer 0/High Definition Audio 0x14f15051
Known controls are:
jack.fp-green.mode <pcm1|pcm2> (currently pcm1)
jack.fp-pink [<leftvol>:<rightvol>] (currently 39.9:39.9 dB)
record.fp-mic [<leftvol>:<rightvol>] (currently 64.9:64.9 dB)
misc.pcm1 [<leftvol>:<rightvol>] (currently 59.9:59.9 dB)
misc.pcm2 [<leftvol>:<rightvol>] (currently 59.9:59.9 dB)
misc <-28.-8dB|-19.-2dB|-9.-6dB|0.0dB> (currently -9.-6dB)
vmix0-enable ON|OFF (currently ON)
vmix0-rate <decimal value> (currently 48000) (Read-only)
vmix0-channels <Stereo|Multich> (currently Stereo)
vmix0-src <Fast|High|OFF> (currently Fast)
vmix0-outvol <monovol> (currently 25.0 dB)
vmix0-invol <monovol> (currently 25.0 dB)
vmix0.pcm4 [<leftvol>:<rightvol>] (currently 25.0:25.0 dB) ("ossplay")
vmix0.pcm5 [<leftvol>:<rightvol>] (currently 25.0:25.0 dB)
vmix0.pcm6 [<leftvol>:<rightvol>] (currently 25.0:25.0 dB)
vmix0.pcm7 [<leftvol>:<rightvol>] (currently 25.0:25.0 dB)
/proc/interrupts:
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CPU0 CPU1
0: 65 0 IO-APIC-edge timer
1: 2 0 IO-APIC-edge i8042
7: 1 0 IO-APIC-edge
8: 5 0 IO-APIC-edge rtc0
9: 0 0 IO-APIC-fasteoi acpi
12: 4 0 IO-APIC-edge i8042
20: 7460 0 IO-APIC-fasteoi ohci_hcd:usb2
21: 1502 0 IO-APIC-fasteoi ohci_hcd:usb1
22: 2 0 IO-APIC-fasteoi ehci_hcd:usb4
23: 39645 0 IO-APIC-fasteoi ehci_hcd:usb3, oss_hdaudio0
221: 7454 0 PCI-MSI-edge ahci
NMI: 0 0 Non-maskable interrupts
LOC: 432134 432111 Local timer interrupts
RES: 970 1086 Rescheduling interrupts
CAL: 120 299 function call interrupts
TLB: 214 519 TLB shootdowns
TRM: 0 0 Thermal event interrupts
SPU: 0 0 Spurious interrupts
ERR: 1
MIS: 0