07-23-2014
Problems with audio recording in Audacity 2.0.5. Slackware64 14.1; Intel HD Audio.
I'm trying to record audio using Audacity 2.0.5 installed from SlackBuilds. My system is 64-bit Slackware 14.1 and a sound card is Intel HD Audio. I didn't change my sound system to OSS. (Default sound system in Slackware 14.1 is ALSA, isn't it?) First, I set Internal Microphone slider in KMix to the maximum level. It is strange, that everything, I've been saying into the microphone was immediately played. Then I opened Audacity and started recording. Audacity didn't record anything.
In Ubuntu 14.04&12.10 there wasn't such thing.
Help me solve this problem! Thanks in advance!
// Sorry for my broken English. Could you tell me, please, where are mistakes?
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LEARN ABOUT DEBIAN
osstest
osstest(1) OSS User Commands osstest(1)
NAME
osstest - Open Sound System audio self test applet.
DESCRIPTION
The osstest applet is a simple test application that can be used to test functionality of the sound hardware installed in the system.
osstest performs a playback test for each installed audio device. If there are any "machine detectable" problems they will be reported. You
will first hear an audio sample played on the left speaker, then the right speaker and finally in stereo on both speakers.
It's user's responsibility to listen if the test sound is audible. If no sound output can be heard the possible reason is one of the fol-
lowing:
1. An error was reported by osstest. In this case there will usually not be any sound output. The error needs to be fixed before running
osstest again.
2. There is no headphones or speakers connected. Or the connection is not made correctly.
3. The mixer volume level is set to a too low value. By default it should be OK. The mixer level can be adjusted using the mixer, ossmix
and ossxmix utilities distributed with OSS.
4. Some notebooks have nonstandard volume control and/or speaker selection hardware that is not supported by OSS. It's very likely that
OSS doesn't support such vendor specific additions.
If no errors were reported and the test sound was audible it means that OSS and your sound hardware is functioning correctly. If you still
encounter problems with some sound applications the reason is almost certainly in the application. Check it's configuration or try to use
another equivivalent application.
If you are having problems with JDS, KDE and/or Gnome system sounds, you need to make sure that OSS gets started before the GUI environ-
ment. Refer to your operating system's startup procedures.
SAMPLE RATE DRIFT
The osstest utility measures a sample rate drift value after playing back the test sound. Ideally it should be 0% but in practice there
will be an error of few percents. 0% means that the 48000 Hz test file was played exactly at 48000 Hz sampling rate.
The sample rate measurement is based on the system timer which has limited precision. It's likely that less than 1% differenc between the
nominal and the measured sampling rates are actually caused by an error in the measurement. For this reason the drift reported by osstest
should not be used as any kind of quality measurement. However if the drift is very large it means that there is something wrong in the
system. The oscillator chip used with the sound chip is broken or the system clock is running at a wrong speed.
USING OSSTEST MANUALLY
The osstest utility is located in the /usr/bin directory. It can be run manually to test functionality of OSS and your sound hardware. When
invoked without any command line parameters osstest performs the default test on all devices. However it will skip some of the devices base
on the following rules.
o It is possible to test just one of the available audio devices by giving its number on command line (for example osstest 1). Use the
device index numbers reported by "ossinfo -a".
o Use the -l command line option to loop the test infinitely.
o Virtual mixer devices will not be tested. Use the -V command line option to force test of virtual devices.
o The actual (physical) audio devices will be tested directly (bypassing virtual mixer). If you want to test playback through vmix then
use the -V option.
o Multiple device files related with the same physical device will not be tested. Only the first one gets tested while the remaining ones
will be skipped. At this moment there is no way to force osstest to test this kind of devices.
o Only stereo devices will be tested. Future versions of osstest will be able to test mono and multi channel devices too. Also osstest
requires that the device supports the 16 bit signed format and 48kHz sampling rate.
o Send a SIGQUIT (Ctrl- on most terminals) to make osstest skip a device.
FILES
/usr/bin/osstest
SEE ALSO
savemixer(1)
AUTHOR
4Front Technologies
16 December 2012 osstest(1)