I am using MPD (music player daemon) for my music jukebox: a sheevaplug with an Audiophile USB attached to it.
On Ubuntu, the Audiophile USB is recognized as:
$ cat /proc/asound/cards
1 [tm ]: USB-Audio - Audiophile USB (tm)
M-Audio Audiophile USB (tm) at usb-orion-ehci.0-1, full speed
The following configuration is working well.
/etc/asound.conf:
defaults.pcm.rate_converter "samplerate_best"
pcm.!default {
type plug
slave.pcm hw
}
in /etc/mpd.conf:
audio_output {
type "alsa"
name "M-Audio Audiophile USB"
device "plughw:1,0" # optional
}
I am not very sure, but it seems that alsa is correctly avoiding needless sample rate
conversion.
Playing 48Khz source:
$ cat /proc/asound/card1/stream0
M-Audio Audiophile USB (tm) at usb-orion-ehci.0-1, full speed : USB Audio
Playback:
Status: Running
Interface = 2
Altset = 5
URBs = 2 [ 1 1 ]
Packet Size = 192
Momentary freq = 48000 Hz (0x30.0000)
...
Playing 44.1Khz source:
$ cat /proc/asound/card1/stream0
M-Audio Audiophile USB (tm) at usb-orion-ehci.0-1, full speed : USB Audio
Playback:
Status: Running
Interface = 2
Altset = 5
URBs = 2 [ 1 1 ]
Packet Size = 192
Momentary freq = 44100 Hz (0x2c.199a)
Interface 2
...
And an MPD client, Minion, makes MPD manipulations so comfortable. :-)
The only thing I badly want for MPD is practical cue sheet support :-(
