XMOS usb audio 2.0 og linux

[Roberth]

Hei

Har en dac med usb inngang basert XMOS usb audio 2.0, bruker Linux og MPD for musikk avspilling.

Her er alsa oppsettet i MPD:

[FONT=monospace][COLOR=#000000]audio_output {[/COLOR]
        type            "alsa"
        name            "My ALSA Device"
        device          "hw:2,0"
        format          "44100:16:2"
        auto_resample   "no"
        mixer_type      "none"
}
[/FONT]

Og alsamixer:

Disse volumkontrollene kan jeg bruke til å still volumet når jeg spiller med MPD.

Hvordan får jeg MPD til å ikke bruke noen mixer?

EDIT: Når jeg titter i loggene ser jeg dette:

[FONT=monospace][COLOR=#000000]Apr 21 05:51 : playlist: play 0:"Dr Hook/Dr Hook - [1971] Doctor Hook/01 Sylvia's Mother.flac"[/COLOR]
Apr 21 05:51 : client: [0] command returned 0
Apr 21 05:51 : playlist: queue song 1:"George Harrison/George Harrison - All Things Must Pass (2010 Remaster Web Download Resampled to 44-16) - FLAC/05 - What Is Life.flac"
Apr 21 05:51 : decoder_thread: probing plugin flac
Apr 21 05:51 : decoder: audio_format=44100:16:2, seekable=true
Apr 21 05:51 : alsa_output: opened hw:2,0 type=HW
Apr 21 05:51 : alsa_output: format=S32_LE (Signed 32 bit Little Endian)
Apr 21 05:51 : alsa_output: buffer: size=16..131072 time=362..2972155
Apr 21 05:51 : alsa_output: period: size=8..65536 time=181..1486078
Apr 21 05:51 : alsa_output: default period_time = buffer_time/4 = 500000/4 = 125000
Apr 21 05:51 : alsa_output: buffer_size=22050 period_size=5513
Apr 21 05:51 : output: opened plugin=alsa name="My ALSA Device" audio_format=44100:32:2
Apr 21 05:51 : output: converting from 44100:16:2
Apr 21 05:51 : client: [0] process command "status"
Apr 21 05:51 : client: [0] command returned 0
Apr 21 05:51 : client: [0] process command "replay_gain_status"
Apr 21 05:51 : client: [0] command returned 0
Apr 21 05:51 : client: [1] process command "idle"
Apr 21 05:51 : client: [1] command returned 1
Apr 21 05:51 : client: [0] process command "status"
Apr 21 05:51 : client: [0] command returned 0
Apr 21 05:51 : client: [0] process command "replay_gain_status"
Apr 21 05:51 : client: [0] command returned 0
Apr 21 05:51 : client: [1] process command "idle"
Apr 21 05:51 : client: [1] command returned 1
Apr 21 05:51 : client: [0] process command "currentsong"
Apr 21 05:51 : client: [0] command returned 0
[/FONT]

Ser ut til at MPD resampler også.

 

[nma]

Du dropper format: "xxx:xxx".
Alt går gjennom alsamixer, ellers må du selv kompilere alsa uten mixer-komponenten.