Red Hat Bugzilla – Bug 429778
Unable to record sound with OSS (SB Live)
Last modified: 2008-01-24 15:52:17 EST
Description of problem: I'm unable to record any sound using OSS device. Tested with Audacity 1.3.2 (with OSS device enabled), kiax (iax voip client using Port Audio v18) and "Sound Preferences" (/dev/dsp). Nothing is recorded. NOTE: I'm not sure which component is responsible for that. Feel free to change it. Version-Release number of selected component (if applicable): 1.0.15-1 How reproducible: Always Steps to Reproduce: 1. In Audacity select "OSS: /dev/dsp" device for recording (Edit -> preferences) 2. Try to record anything (record button) using a microphone Actual results: No input signal visible, nothing is recorded. Expected results: A voice is recorded Additional info: It's very unpleasant when you use VoIP software which hasn't been ported to ALSA. Sound card: Sound Blaster Live 5.1 There was a problem also with recording using ALSA device, but in current version I'm able to record from two devices: ALSA: SB Live 5.1: Multichannel Capture/PT Playback (hw:0:2) ALSA: iec958
Recording worked "fine" (at the end - there were always some issues after upgrade) with FC5 and FC6 (not tested with F7).
OSS in Audacity does not use alsa-lib, but the low-level OSS device interface (and hence ALSA's OSS emulation kernel modules). I'm not up-to-date on ALSA, but I think it doesn't do OSS in user-space yet. "rpm -qi alsa-lib" is a mystery to me right now. OSS based recording in Audacity work's here. You may need to choose a working input channel and un-mute it.
Thanks Michael. In fact it was problem with my settings. "AC97 Capture" was muted and not selected to be a source for recording (need to be selected together with "Capture" - I don't know really why). Sound quality hears to be worst, but it's probably my subjective opinion :). I have also problem with testing sound capture in gnome-sound-properties (I hear only a few first seconds), but I will wait to check if it also happens with 1.0.16rc1 (hopefully soon in devel).