Thread: WIP: USB audio output - N900 as an "audiophile" portable music player
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joerg_rw is offline joerg_rw
2012-03-27 , 21:12
Posts: 2,222 | Thanked: 12,651 times | Joined on Mar 2010 @ SOL 3
#18
Originally Posted by fpp View Post
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I'm not clear about the reason for that though : is it because we're bypassing pulseaudio ? Or put otherwise, if we could use the standard Maemo media player with the USB output, would it be using the DSP ? Or is some totally different software needed ?
AIUI there's a PA /gstreamer plugin that does the mp3 decoding in DSP for mafw. madiaplayer just delegates the whole mp3 file to mafw to play it.
I dunno if this special plugin directly routes to DA-converter aka soundcard, or this is done the standard way of gstreamer plugin chains where this DSP plugin would stream the plain PCM (aka "wav") audio data to next plugin. IF the latter, then you of course could change the properties of (or the whole) sink plugin.

Originally Posted by fpp View Post
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About Easy Debian : I haven't really used this on the N900, so the question may be stupid... but will h-e-n and USB host still work for apps running under Debian ?
Should, as long as you map /proc and /sys and /dev into the changeroot

/j
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