ucm2 USB-Audio: Add support for ASUS Xonar U7 - #622
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Add UCM profile for ASUS Xonar U7 USB audio interface (1043:8586). Hardware provides: - Analog multi-channel output (2/4/6/8ch) via hw:1,2 - Front headphone jack (hardware-switched with rear analog) - Rear outputs for surround setups - S/PDIF digital output via hw:1,0 Key improvements: - Direct hardware mixer control via PlaybackMixerElem - Eliminates double volume control (software + hardware) - Preserves full dynamic range and bit depth - System volume slider directly controls hardware PCM mixer (numid=7) - All output modes properly exposed (stereo, 4.0, 5.1, 7.1, S/PDIF) - Fixes incorrect generic UCM mapping of analog output to S/PDIF device Without this UCM, the generic USB-Audio profile incorrectly maps analog output to hw:1,0 (S/PDIF), resulting in no audio output.
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Please, correct the device names. https://github.com/alsa-project/alsa-lib/blob/master/include/use-case.h#L132 |
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Add UCM profile for ASUS Xonar U7 USB audio interface (1043:8586) to fix incorrect output mapping and enable hardware volume control.
Audio topology:
hw:1,0: S/PDIF PCM Output (rear panel)
hw:1,1: S/PDIF AC3 Passthrough (not exposed - compressed audio only)
hw:1,2: Analog Multi-Channel Output
-2ch: Front Headphone Jack
-4ch: Front + Rear outputs
-6ch: Front + Rear + Center/LFE outputs
-8ch: All outputs (Front + Rear + Center/LFE + Side)
Key changes:
Without this UCM, the generic USB-Audio profile incorrectly maps analog output to hw:1,0 (S/PDIF), resulting in no audio output when plugging in headphones.