Hello, This patches serie adds support for the Pioneer DJM-850 mixer. The mixer has a 24bits (little endian) sound card, which features 4 stereo channels for capture and 4 stereo channels for playback. The mixer also has controls to specify the capture source for each channels, and also a control to set the sample rate (44.1kHz, 48kHz, 96kHz). Thank you :) Signed-off-by: Nicolas MURE <nicolas.mure2019@xxxxxxxxx>