Hot answers tagged alsa
As KDE 5 seems to be just frontend for PulseAudio, you can use direct access to PulseAudio with pactl command. You will have to experiment a little bit to find a correct settings for you exact setup, but I would recommend excellent Arch Linux wiki on Pulse Audio, the Pulse Audio Configuration and Examples. After figuring the correct commands, create a ...
It seems that this user-interface aspect is being redesigned at the moment. There is a blog post that is describing the problem, proposing a solution, and requesting feedback. Do check it out here: http://davidrosca.blogspot.ca/2016/04/audio-volume-improvements-in-plasma-57.html
You cannot have more than one options line for the same module. The first two indexes are taken by the two HDA devices, so it is not possible to force the USB device to have index 1. To move the second HDA device to the third index, use something like this: options snd-hda-intel index=0,2
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