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How to change mixing of channels by pulse audio / alsa

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http://unix.stackexchange.com – I have a recent problem with my sound configuration. Basically, it's way too loud until I set the volume below 10%. And then it's very quickly too silent. Using the alsa mixer, I can set the headphone volume and PCM volume to about 50% and then obtain a reasonable range on the master. But any application using pulse will reset all the non-master channels to max and kill my ears instantly. Is there a way to force pulse to NOT change the other channels? I tried to look for information, and it seems that I need to change the channels from "mixin" to "ignore" in the configuration file, but there (HowTos)