Red Hat Bugzilla – Bug 979896
Volume scaling problems with Dragonfly USB DAC
Last modified: 2014-02-05 17:01:44 EST
Description of problem:
Hardware: The Dragonfly USB audio DAC:
It is detected by PulseAudio as "7 Series/C210 Series Chipset Family USB xHCI Host Controller Analog Stereo" and by lsusb as 21b4:0081.
This DAC works out of the box with PulseAudio on Fedora 18, but there are problems with volume scaling:
Problem #1: I can switch the output channel to play through the Dragonfly DAC, but at PulseAudio volume settings below 100%, the sound is barely audible. At volume settings above 100% (even 101-103%), the volume quickly shoots up to painful levels.
Problem #2: After setting the volume above 100%, the sound plays for a couple of seconds, then the volume is damped back down to inaudible levels, as if the slider were still set to 100% (but it is still showing whatever it was dragged to). It seems like there is a volume governer at work that is automatically turning down the sound.
Version-Release number of selected component (if applicable):
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