On 28/03/2020 12:45, Jan Beich wrote: > Graham Perrin <grahamperrin_at_gmail.com> writes: > >> I can't get web browsers to recognise USB microphones. >> >> USB output (e.g. to my headphones) is OK. >> >> USB input (e.g. from the microphone part of the headphones) is not. >> >> Any suggestions? > Firefox uses "pulse-rust" cubeb backend *by default* if "pulseaudio" > package is installed. getUserMedia is supposed to preset a dropdown menu > to select a microphone. Make sure pulseaudio actually recognizes the > desired microphone e.g., debug via "pactl list" and "parec". > > I don't have a mic but, looking at the code, only pulse-rust or pulse > backends on Linux/FreeBSD support selecting non-default audio device. > It maybe possible to use other backends but if audio device used for > output and input are different that'd require routing defaults which can > be done via config file (e.g., ~/.asoundrc) or externally via virtual_oss. > >> pcm3: <USB audio> (play/rec) default >> pcm4: <USB audio> (rec) > Are these distinct physical devices? Yes. > >> hw.snd.default_unit: 3 > Have you tried using 4? I did, but decided that the device previously at 4 (Alctron USB700 <https://www.alctron-audio.com/EN/microphones/USB/USB700.html>) probably has a hardware fault. Worth noting: if I attempt to suspend the system whilst the device at 3 (SteelSeries Siberia 350 headphones with integral microphone <https://steelseries.com/gaming-headsets/siberia-350>) is physically connected, suspend sometimes fails; it becomes necessary to force off the computer. If I start the system with the headphones connected, then the microphone at 3 is usable at e.g. <https://www.podcastinsights.com/online-mic-test/> and <https://talky.io/> (see <https://i.imgur.com/Ch3SuZn.png>) but not in Microsoft Teams. If I disconnect the headphones (to minimise the risk of failure to suspend), then reconnect, the system seems unable to reuse the headphones (see <https://i.imgur.com/8Of5MUK.png>); a restart is required. In Microsoft Teams, neither 2 nor 3 is detected; there's only 1 (see <https://i.imgur.com/13HmxKi.png>) and after allowing use of /dev/dsp1 it 'disappears', leaving only the camera in use (head of <https://i.imgur.com/k5ak2jL.png>).Received on Mon Mar 30 2020 - 17:13:15 UTC
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