Audio setup

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Hardware: RME ADI-2 DAC FS (old version with AK4490 chip) connected via USB

/etc/sysctl.conf:

# audio
hw.snd.default_unit=4
hw.snd.feeder_rate_quality=4
dev.pcm.4.play.vchanmode=1
dev.pcm.4.play.vchanrate=48000
dev.pcm.4.play.vchanformat=s32le:2.0
dev.pcm.4.rec.vchanmode=1
dev.pcm.4.rec.vchanrate=48000
dev.pcm.4.rec.vchanformat=s32le:2.0
kern.timecounter.alloweddeviation=0
hw.usb.uaudio.buffer_ms=1
hw.snd.latency=0
hw.snd.latency_profile=0

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