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2

There is a driver that replaces the standard driver for the ISA UART 16550 chip on IBM-compatible PCs (documentation), but this does not work on different architectures. To connect an existing /dev/tty* device with ALSA, try a daemon such as ttyMIDI.


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The dmix plugin works only with a hw plugin as slave. If you want to mix the output of Jack and other programs, use Jack on top of dmix, or consider using PulseAudio.


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Turns out each output device needs its own dmix: [!default] → multi → dmix → hw [normal] ↳ dmix → hw [loopback] I was missing a second dmix between the multi and loopback-hw, so although my usual card would have been fine, the loopback card had no mixing. Many thanks to CL. for patience and expertise. For the technical details, ...


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'Virtual' mixer controls are attached to the driver of a 'real' sound card, and are automatically saved to and restored from /var/lib/alsa/asound.state together with the other controls. To remove them, you must unload the driver module of your sound card (probably snd-hda-intel), and then remove the entries from /var/lib/alsa/asound.state before reloading ...


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The problem was rather simple, I needed to select Analog Stereo Duplex to get the mic and speakers working for things like Skype calls.


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I found out what the problem was. The command defaults because I wasn't specifying a 2-channel (stereo) 192kHz audio input. Here's an example of a command that did work: $ arecord -f S24_LE -c 2 -r 192000 -d 20 test.wav The -c 2 is what fixed my commands.


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I just tried this and it works for me (where my card is card 0): defaults.pcm.card 0 defaults.ctl.card 0 defaults.ctl.card 0 just add that to the top of your .asoundrc and restart firefox. The rest of the file does not actually need to be empty.


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In the end, the solution to alleviating the choppiness was removing pulseaudio (and pulseaudio-alsa, and configuring alsa correctly, for which I used asoundconf, and rebooting).


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Either there is a software problem or the hardware can't handle it. I cannot tell from your question. Anyways, I'm going to give you some generic advice which hopefully should work. Debug PulseAudio/Choppiness fix Edit /usr/local/etc/pulse/daemon.conf as root. There should be lines that read #default-fragments = 8 and #default-fragment-size-msec = 5. ...


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Finally doing alsamixer and using F6 to select the right soundcard did the job!



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