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Date:      Sun, 19 Apr 2020 14:47:05 -0700
From:      Terin Stock <terinjokes@gmail.com>
To:        freebsd-multimedia@freebsd.org
Subject:   USB Audio Recording Yamaha MG12XU
Message-ID:  <CAAWJHN2YrWHRToi3KYFyeqC72BcqhkLyLqX5UGGYBBoGErp%2BTA@mail.gmail.com>

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I've recently installed FreeBSD 12.1-RELEASE-p3 and I'm having some
issues with many of my audio devices. I'll start with one, my Yamaha
MG12XU mixer and audio interface.

The device is found by snd_uaudio when it's connected.

    uaudio1 on uhub6
    uaudio1: <Yamaha Corporation MG-XU, class 239/2, rev 2.00/1.10,
addr 20> on usbus0
    uaudio1: Play: 192000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
    uaudio1: Play: 176400 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
    uaudio1: Play: 96000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
    uaudio1: Play: 88200 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
    uaudio1: Play: 48000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
    uaudio1: Play: 44100 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
    uaudio1: Record: 192000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
    uaudio1: Record: 176400 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
    uaudio1: Record: 96000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
    uaudio1: Record: 88200 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
    uaudio1: Record: 48000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
    uaudio1: Record: 44100 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
    uaudio1: No MIDI sequencer.
    pcm4: <USB audio> on uaudio1
    uaudio1: No HID volume keys found.

It appears in /dev/sndstat:

    Installed devices:
    pcm0: <Realtek ALC298 (Analog 2.0+HP/2.0)> (play/rec)
    pcm1: <Realtek ALC298 (Internal Analog Mic)> (rec)
    pcm2: <Intel Kaby Lake (HDMI/DP 8ch)> (play)
    pcm3: <USB audio> (rec)
    pcm4: <USB audio> (play/rec) default

While sndstat reports "play/rec" there seems to be no recording channel:

    $ mixer -f /dev/mixer4
    Mixer vol      is currently set to  75:75
    Mixer pcm      is currently set to  75:75

    $ systctl dev.pcm.4
dev.pcm.4.feedback_rate: 0
dev.pcm.4.bitperfect: 0
dev.pcm.4.buffersize: 0
dev.pcm.4.rec.vchanformat: s16le:2.0
dev.pcm.4.rec.vchanrate: 48000
dev.pcm.4.rec.vchanmode: fixed
dev.pcm.4.rec.vchans: 1
dev.pcm.4.play.vchanformat: s16le:2.0
dev.pcm.4.play.vchanrate: 48000
dev.pcm.4.play.vchanmode: fixed
dev.pcm.4.play.vchans: 1
dev.pcm.4.hwvol_mixer: vol
dev.pcm.4.hwvol_step: 5
dev.pcm.4.%parent: uaudio1
dev.pcm.4.%pnpinfo:
dev.pcm.4.%location:
dev.pcm.4.%driver: pcm
dev.pcm.4.%desc: USB audio
-- 
Terin Stock



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