Alec Leamas wrote: > >> Its setup is: >> stream : PLAYBACK >> access : RW_INTERLEAVED >> format : S16_LE >> subformat : STD >> channels : 2 >> rate : 44100 >> exact rate : 44100 (44100/1) >> msbits : 16 >> buffer_size : 22050 >> period_size : 5512 >> period_time : 125000 >> tstamp_mode : NONE >> period_step : 1 >> avail_min : 5512 >> period_event : 0 >> start_threshold : 22050 >> stop_threshold : 22050 >> silence_threshold: 0 >> silence_size : 0 >> boundary : 1445068800 >> >>
I attach more output. What you have seen so far was the log when ekiga plays the ring tone (by far the most damaged sound). When running the echo test the setup is different stream : PLAYBACK access : RW_INTERLEAVED format : S16_LE subformat : STD channels : 1 rate : 8000 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< exact rate : 8000 (8000/1) <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< msbits : 16 buffer_size : 800 period_size : 160 period_time : 20000 tstamp_mode : NONE period_step : 1 avail_min : 160 period_event : 0 start_threshold : 1 stop_threshold : 800 silence_threshold: 0 silence_size : 0 boundary : 1677721600 And I cannot see any underrun at all. My echo test uses PCMA. It is possible that with a better codec (i.e. higher rate that 8000), we see them again. Don't really know how to test. I would say that the quality of the echo test with or without pulse is the same (but being only 8000 Hz, it is already not perfect and more difficult to judge). All my tests so far have been run in debug, so the speed of ekiga/opal/ptlib is already lower the release. The quality of the ring tone is though more or less the same. I will try to rerun everything in release. I have 2 points 1) Is the following true: ekiga-pulse gives bad audio quality because there are underruns. So, if for some connection there are no underruns (e.g. my echo test) then, the quality is not expected to be lower than alsa-direct, and we should not complain about pulse. 2) If underruns are (the) evil (or at least the biggest problem), then it would be good to print some indication of how close to the underrun we are. Does alsa provide that? Is it already part of my log? I still have not fully understood your comments about the values printed in the log. I need to get familiar with the terminology. And I have not yet checked for overruns when reading from the microphone. Andrea
echo.direct.txt.gz
Description: GNU Zip compressed data
echo.pulse.txt.gz
Description: GNU Zip compressed data
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