'Twas brillig, and Colin Guthrie at 27/09/10 10:34 did gyre and gimble: > 'Twas brillig, and David Henningsson at 27/09/10 09:53 did gyre and gimble: >> So over the previous weeks I've been working on a small script which >> tests whether the ALSA mixer lives up to PA's expectations. If you are >> familiar with dbmeasure or dbverify by Lennart Poettering, this >> application's purpose is very similar, but this one is hopefully easier >> to set up, more user friendly, and also tests that the names of the >> volume controls are correct. >> My hope is that this will aid as a debugging tool for all these >> "everything below 20% of my speaker is muted, and then 21% blows my >> speakers" bugs. >> >> To use the tool, you'll need some kind of loopback. You can e g use a >> loopback cable and connect that between line in and line out, or test >> your laptop's internal speakers with your laptop's internal mic (just >> stop humming when you do so :-) ). Just set up the recording levels >> appropriately. >> >> Alsamixertest is available for Ubuntu Lucid and Ubuntu Maverick from >> these PPAs: >> Lucid: https://launchpad.net/~diwic/+archive/ppa >> Maverick: https://launchpad.net/~diwic/+archive/maverick >> >> For other distributions, download the tarball: >> https://launchpad.net/~diwic/+archive/ppa/+files/alsamixertest_47.14.tar.gz >> Unpack and read the readme file for compilation and install instructions. >> >> When it is installed, run "alsamixertest -r" for a small tutorial and >> "alsamixertest -h" for command line options help. >> >> Looking forward to your comments about this new little tool! I think it >> should be considered "beta" quality at this point. > > Cool. Packaged up for Mandriva too now. What license do you use. > Couldn't seem to find any reference to it... > > Not tried it yet but will try and take it for a spin soon. OK, for reference here is my output: I don't actually have a specific headphones profile (no separate mixer for headphones) but the results are more or less the same with and without the -p argument (the only thing different appears to be the range of the PCM tests). Ultimately the results seem to indicate that "Master" is OK, but out by a bit, but PCM is all kinds of broken. FWIW, the testing for -18.0, expected -21.04 measure -20.03dB is all a little confusing. When testing for -18.0, why is 021.04 expected? Perhaps some more explanation would be nice as to why the expected values differ from the test value. Anyway the output: [colin at jimmy pulse]$ alsamixertest -p analog-output-headphones INFO:root:Running initial test signal. INFO:root:Testing that Master actually mutes the signal INFO:root:Running test for mixer Master, level -3.00dB INFO:root:Running test for mixer Master, level -4.50dB INFO:root:Running test for mixer Master, level -6.00dB INFO:root:Running test for mixer Master, level -9.00dB INFO:root:Running test for mixer Master, level -10.50dB INFO:root:Running test for mixer Master, level -12.00dB INFO:root:Running test for mixer Master, level -15.00dB INFO:root:Running test for mixer Master, level -16.50dB INFO:root:Running test for mixer Master, level -18.00dB ERROR:root:Error 6: Mixer Master has invalid dB data for dB=-18.0, expected -21.04dB but measured -20.03dB. INFO:root:Running test for mixer Master, level -21.00dB ERROR:root:Error 6: Mixer Master has invalid dB data for dB=-21.0, expected -24.04dB but measured -22.72dB. INFO:root:Running test for mixer Master, level -22.50dB ERROR:root:Error 6: Mixer Master has invalid dB data for dB=-22.5, expected -25.54dB but measured -24.09dB. INFO:root:Running test for mixer Master, level -24.00dB ERROR:root:Error 6: Mixer Master has invalid dB data for dB=-24.0, expected -27.04dB but measured -25.40dB. INFO:root:Running test for mixer Master, level -27.00dB ERROR:root:Error 6: Mixer Master has invalid dB data for dB=-27.0, expected -30.04dB but measured -28.16dB. INFO:root:Running test for mixer Master, level -28.50dB ERROR:root:Error 6: Mixer Master has invalid dB data for dB=-28.5, expected -31.54dB but measured -29.30dB. INFO:root:Running test for mixer Master, level -30.00dB ERROR:root:Error 6: Mixer Master has invalid dB data for dB=-30.0, expected -33.04dB but measured -30.70dB. INFO:root:Running test for mixer Master, level -33.00dB ERROR:root:Error 6: Mixer Master has invalid dB data for dB=-33.0, expected -36.04dB but measured -33.43dB. INFO:root:Running test for mixer Master, level -34.50dB ERROR:root:Error 6: Mixer Master has invalid dB data for dB=-34.5, expected -37.54dB but measured -34.67dB. INFO:root:Running test for mixer PCM, level -2.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-2.0, expected -5.04dB but measured -3.05dB. INFO:root:Running test for mixer PCM, level -4.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-4.0, expected -7.04dB but measured -3.12dB. INFO:root:Running test for mixer PCM, level -6.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-6.0, expected -9.04dB but measured -3.11dB. INFO:root:Running test for mixer PCM, level -8.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-8.0, expected -11.04dB but measured -3.11dB. INFO:root:Running test for mixer PCM, level -10.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-10.0, expected -13.04dB but measured -3.12dB. INFO:root:Running test for mixer PCM, level -12.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-12.0, expected -15.04dB but measured -3.12dB. INFO:root:Running test for mixer PCM, level -14.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-14.0, expected -17.04dB but measured -3.11dB. INFO:root:Running test for mixer PCM, level -16.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-16.0, expected -19.04dB but measured -3.11dB. INFO:root:Running test for mixer PCM, level -18.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-18.0, expected -21.04dB but measured -3.12dB. INFO:root:Running test for mixer PCM, level -20.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-20.0, expected -23.04dB but measured -3.12dB. INFO:root:Running test for mixer PCM, level -22.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-22.0, expected -25.04dB but measured -3.12dB. INFO:root:Running test for mixer PCM, level -24.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-24.0, expected -27.04dB but measured -3.11dB. INFO:root:Running test for mixer PCM, level -26.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-26.0, expected -29.04dB but measured -3.12dB. INFO:root:Running test for mixer PCM, level -28.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-28.0, expected -31.04dB but measured -3.12dB. INFO:root:Running test for mixer PCM, level -30.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-30.0, expected -33.04dB but measured -3.11dB. INFO:root:Running test for mixer PCM, level -32.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-32.0, expected -35.04dB but measured -3.11dB. INFO:root:Running test for mixer PCM, level -34.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-34.0, expected -37.04dB but measured -3.12dB. INFO:root:Running test for mixer PCM, level -36.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-36.0, expected -39.04dB but measured -3.11dB. INFO:root:Running test for mixer PCM, level -38.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-38.0, expected -41.04dB but measured -3.12dB. INFO:root:Running test for mixer PCM, level -40.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-40.0, expected -43.04dB but measured -3.12dB. INFO:root:Running test for mixer PCM, level -42.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-42.0, expected -45.04dB but measured -3.12dB. INFO:root:Running test for mixer PCM, level -44.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-44.0, expected -47.04dB but measured -3.10dB. INFO:root:Running test for mixer PCM, level -46.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-46.0, expected -49.04dB but measured -3.12dB. INFO:root:Running test for mixer PCM, level -48.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-48.0, expected -51.04dB but measured -3.12dB. INFO:root:Running test for mixer PCM, level -50.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-50.0, expected -53.04dB but measured -3.11dB. INFO:root:Running test for mixer PCM, level -51.00dB ERROR:root:Error 6: Mixer PCM has invalid dB data for dB=-51.0, expected -54.04dB but measured -3.12dB. -- Colin Guthrie gmane(at)colin.guthr.ie http://colin.guthr.ie/ Day Job: Tribalogic Limited [http://www.tribalogic.net/] Open Source: Mageia Contributor [http://www.mageia.org/] PulseAudio Hacker [http://www.pulseaudio.org/] Trac Hacker [http://trac.edgewall.org/]
