[PROBLEM] MPD error Failed to opend audio output

[lastshots]

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I have searched Forum and try to find similar case, but didn't find captioned error, so please let me ask.

My DAC to be nicely reconigzed, and here's startup log

20211008 161240 worker: -- Start
20211008 161243 worker: Successfully daemonized
20211008 161742 worker: Integrity check (passed)
20211008 161743 worker: File check (OK)
20211008 161745 worker: Session vacuumed
20211008 161752 worker: Session loaded
20211008 161753 worker: Debug logging (OFF)
20211008 161753 worker: -- Audio debug
20211008 161753 worker: ALSA cards: (0:b1 | 1:Headphones | 2:FDigitalAmpD302 | 3:empty
20211008 161753 worker: MPD config: (2:NFJ F-DigitalAmpD302J+ | mixerPCM) | card:2)
20211008 161759 worker: ALSA mixer actual (PCM)
20211008 161759 worker: ALSA PCM volume set to (0%)
20211008 161759 worker: -- System
20211008 161802 worker: Host     (moode)
20211008 161802 worker: moOde    (7.3.0 2021-06-25)
20211008 161802 worker: RaspiOS  (10.6)
20211008 161802 worker: Kernel   (5.4.77-v7l+ #1371)
20211008 161802 worker: Platform (Pi-4B 1.2 4GB)
20211008 161802 worker: ARM arch (armv7l, 32-bit kernel)
20211008 161802 worker: MPD ver  (0.22.8_p0x3)
20211008 161802 worker: CPU gov  (ondemand)
20211008 161802 worker: USB boot not available
20211008 161803 worker: File system expanded
20211008 161803 worker: HDMI port on
20211008 161803 worker: -- Network
20211008 161803 worker: eth0 exists
20211008 161803 worker: eth0 wait 0 for IP address
20211008 161806 worker: eth0 wait 1 for IP address
20211008 161809 worker: eth0 wait 2 for IP address
20211008 161812 worker: eth0 wait 3 for IP address
20211008 161816 worker: eth0 wait 4 for IP address
20211008 161819 worker: eth0 address not assigned
20211008 161819 worker: wlan0 exists
20211008 161819 worker: wifi country (JP)
20211008 161819 worker: wlan0 trying SSID (YK50)
20211008 161821 worker: IP addr (192.168.3.16)
20211008 161821 worker: Netmask (255.255.255.0)
20211008 161823 worker: Gateway (192.168.3.1)
20211008 161823 worker: Pri DNS (2400:2410:8b00:9d00:1111:1111:1111:1111)
20211008 161823 worker: Domain  (192.168.3.1)
20211008 161824 worker: Pi integrated wlan0 power save disabled
20211008 161824 worker: -- Audio config
20211008 161824 worker: ALSA card number (2)
20211008 161825 worker: MPD audio output (NFJ F-DigitalAmpD302J+)
20211008 161825 worker: Audio formats (S16_LE, S24_3LE)
20211008 161825 worker: ALSA mixer name (PCM)
20211008 161825 worker: MPD volume control (none)
20211008 161825 worker: Hdwr volume controller exists
20211008 161825 worker: Max ALSA volume (100%)
20211008 161825 worker: ALSA output mode (Default: plughw)
20211008 161825 worker: ALSA loopback (On)
20211008 161825 worker: Reset renderer active flags
20211008 161825 worker: CamillaDSP (off)
20211008 161825 worker: -- MPD startup
20211008 161825 worker: MPD started
20211008 161826 worker: MPD accepting connections
20211008 161827 worker: MPD output 1 ALSA Default (on)
20211008 161827 worker: MPD output 2 ALSA Bluetooth (off)
20211008 161827 worker: MPD output 3 HTTP Server (off)
20211008 161827 worker: MPD crossfade (off)
20211008 161827 worker: MPD ignore CUE files (yes)
20211008 161827 worker: -- Feature availability
20211008 161827 worker: Source select (available)
20211008 161827 worker: Source select (source: MPD)
20211008 161827 worker: Source select (output: NFJ F-DigitalAmpD302J+)
20211008 161827 worker: Bluetooth (available)
20211008 161827 worker: Airplay renderer (available)
20211008 161827 worker: Spotify renderer (available)
20211008 161827 worker: Squeezelite (available)
20211008 161827 worker: RoonBridge renderer (not installed)
20211008 161827 worker: UPnP renderer (available)
20211008 161827 worker: DLNA server (available)
20211008 161827 worker: UPnP browser (available)
20211008 161827 worker: GPIO button handler (available)
20211008 161827 worker: Stream recorder (n/a)
20211008 161827 worker: -- Music sources
20211008 161827 worker: USB source (EFI)
20211008 161827 worker: NAS and UPnP sources (none configured)
20211008 161827 worker: -- Other
20211008 161827 worker: USB volume knob (Off)
20211008 161827 worker: USB auto-mounter (udisks-glue)
20211008 161827 worker: LED0 (On)
20211008 161827 worker: LED1 (On)
20211008 161827 worker: Saved MPD vol level (0)
20211008 161827 worker: Preamp volume level (0)
20211008 161828 worker: MPD volume level (0) restored
20211008 161828 worker: ALSA PCM volume (100%)
20211008 161828 worker: Auto-play (Off)
20211008 161828 worker: Maintenance interval (3 hours)
20211008 161828 worker: Screen saver activation (Never)
20211008 161828 worker: Session permissions (OK)
20211008 161830 worker: Watchdog started
20211008 161830 worker: Ready

[Tim Curtis]

The device prolly does not support Linux USB audio.

[lastshots]

Text.

The device prolly does not support Linux USB audio.

Thanks for replying

it is really shocked.

The device (=output: NFJ F-DigitalAmpD302J+) works on Macbook perfectly

[Tim Curtis]

Mac doesn't run Linux. It runs a variant of BSD Unix which uses different kernel, USB audio driver etc.

[lastshots]

Text.

Mac doesn't run Linux. It runs a variant of BSD Unix which uses different kernel, USB audio driver etc.

Thanks for reply anyway, have a good day