I have problem with my UCB1400 sound card: there is always loud noise
(something like white noise with periodical clicks) when calling another
client or when i loopback microphone to the speaker. All other
recording/playing programs works fine. pjsystest detects clock drifts:
06:13:41.452 systest.c Running Audio Device Test
06:13:41.693 os_core_unix.c Info: possibly re-registering existing thread
06:13:41.693 audiotest.c Please wait while test is in progress (~11
secs)..
06:13:53.742 pjsua_media.c Set sound device: capture=-1, playback=-2
06:13:53.742 pjsua_media.c .Opening sound device PCM at 8000/1/20ms
06:13:53.779 os_core_unix.c Info: possibly re-registering existing thread
Audio Device Test
Here are the audio statistics:
Rec : interval (min/max/avg/dev)=
0/32/20/15 (ms)
max burst=2
Play: interval (min/max/avg/dev)=
0/32/20/15 (ms)
burst=2
There could be 1 problem(s) with the sound device:
1: Clock drifts detected. Capture is 16 samples/sec faster than the
playback device
But sndtest doesn't detect any drifts:
./sndtest -r 8000 -n 1
06:16:21.475 os_core_unix.c !pjlib 2.0.0-beta for POSIX initialized
06:16:21.517 pa_dev.c PortAudio sound library initialized, status=0
06:16:21.517 pa_dev.c PortAudio host api count=1
06:16:21.517 pa_dev.c Sound device count=1
06:16:21.518 pjlib select() I/O Queue created (0x508cc)
06:16:21.518 sndtest.c Found 1 devices:
06:16:21.518 sndtest.c 0: /dev/dsp (capture=16, playback=16)
06:16:21.526 sndtest.c Testing playback device /dev/dsp
06:16:21.526 sndtest.c Testing capture device /dev/dsp
06:16:21.747 sndtest.c Please wait while test is in progress (~11
secs)..
06:16:33.772 sndtest.c Dumping results:
06:16:33.773 sndtest.c Parameters: clock rate=8000Hz, 80
samples/frame
06:16:33.773 sndtest.c Playback stream report:
06:16:33.773 sndtest.c Duration: 10s.020
06:16:33.773 sndtest.c Frame interval: min=0.002ms, max=16.210ms
06:16:33.773 sndtest.c Jitter: min=5.893ms, avg=13.497ms,
max=16.205ms
06:16:33.773 sndtest.c Capture stream report:
06:16:33.773 sndtest.c Duration: 10s.020
06:16:33.773 sndtest.c Frame interval: min=0.003ms, max=16.147ms
06:16:33.773 sndtest.c Jitter: min=5.892ms, avg=13.492ms,
max=16.139ms
06:16:33.773 sndtest.c Checking for clock drifts:
06:16:33.773 sndtest.c No clock drifts is detected
06:16:33.773 sndtest.c Test completed with some warnings
sndinfo:
./sndinfo
06:18:08.884 os_core_unix.c !pjlib 2.0.0-beta for POSIX initialized
06:18:08.930 pa_dev.c PortAudio sound library initialized, status=0
06:18:08.930 pa_dev.c PortAudio host api count=1
06:18:08.930 pa_dev.c Sound device count=1
06:18:08.930 pjlib select() I/O Queue created (0x4f4c4)
Device #00:
Name : /dev/dsp
# of input channels : 16
# of output channels: 16
Default clock rate : 44100 Hz
Any suggestions?
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