My confusion turned out to be with what exactly alsamixer does. I was getting playthrough because the "Mic" device was unmuted in the mixer. So alsa was doing the playthrough directly. I somehow had the impression that one used alsa mixer to set the input levels of various devices that were available to be opened by software talking to alsa. But by experimenting with audacity, I see that with Mic muted in alsamixer, audacity is able to get input from the Mic device via alsa. Does this imply that ALL input devices should be muted in alsamixer and apps are responsible for reading from the input? For example, it seems to not matter whether I've muted the CD or not.. AlsaPlayer can still play a CD. > On Jan 3, 2005, at 6:47 PM, Christoph Eckert wrote: >> >> Well, playthrough can bei two things: >> >> * The soundcard's input gets immediately visible on it's >> output, without going through your computer. Everything is >> done in the soundcard. Try a mixer application to enable this >> >> * You want to take the input signal, work on it maybe with >> jack-rach and put the changed signal out again. Try jack >> according to the videos, or any other application which can >> alter and output the incoming material. >> >> Let us know what you try to do so we can certainly can give >> some hints how to reach the desired results. >
