Date: Wed, 29 Sep 2021 20:24:02 -0700 From: Pete Wright via freebsd-multimedia <freebsd-multimedia@FreeBSD.org> To: Hans Petter Selasky <hps@selasky.org>, freebsd-multimedia@FreeBSD.org Subject: Re: microphone issues - distorted audio Message-ID: <1c4ce76f-2b4d-bea0-88f5-881cdb66cce6@nomadlogic.org> In-Reply-To: <dd867ce4-21ac-bcd9-1f06-92ef32f0da90@selasky.org> References: <0089d0bd-a948-cff3-1cce-518f65a8bb57@nomadlogic.org> <dd867ce4-21ac-bcd9-1f06-92ef32f0da90@selasky.org>
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On 9/28/21 11:34 PM, Hans Petter Selasky wrote: > On 9/29/21 5:56 AM, Pete Wright via freebsd-multimedia wrote: >> hello, >> i have the following configuration for my audio system on current/amd64: >> >> $ cat /dev/sndstat >> Installed devices: >> pcm0: <ATI R6xx (HDMI)> (play) >> pcm1: <ATI R6xx (HDMI)> (play) >> pcm2: <ATI R6xx (HDMI)> (play) >> pcm3: <ATI R6xx (HDMI)> (play) >> pcm4: <ATI R6xx (HDMI)> (play) >> pcm5: <Realtek ALC892 (Rear Analog 7.1/2.0)> (play/rec) default >> pcm6: <Realtek ALC892 (Front Analog)> (play/rec) >> pcm7: <USB audio> (rec) >> No devices installed from userspace. >> >> >> I am having issues with recording audio, using both my Realtek ALC892 >> as well as via my USB webcam (pcm7). in both cases the audio sounds >> very distorted, if i talk into the microphone my voice is very >> distorted almost mechanical sound. it is interesting that i get the >> same experience with both my ALC892 and USB audio device. I've also >> tried adjusting various mixer settings, and adjusted my input gain to >> no avail. I'm kind of at a loss here to figure out what my next >> debugging steps should be - any pointers? > > Hi, > > In what what is the audio distorted? > > Did you check using "mixer" that the levels are appropriate? > > If you want to use one device for recording and another for playback, > installing a audio daemon like virtual_oss is recommended. It might > simply be a sample rate mismatch. > > Regarding the USB webcam, make sure you device is connected directly > to a port on the computer. > > If you install "sox", there is "rec" and "play" for simple testing. An > environment variable can override the audio device used. > Hey there HPS - thanks for you hints here. It ended up I did need to use virtual_oss, and after some fiddling on my end I am now able to successfully run zoom meetings in firefox with good audio and video quality. cheers! -pete > -- Pete Wright pete@nomadlogic.org @nomadlogicLA
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