From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pavel Hofman <pavel.hofman@insite.cz>
Subject: Re: Juli@ ICE1724 and 24 bit audio
Date: Wed, 11 Feb 2009 09:44:25 +0100
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To: Demian Martin <demianm_1@yahoo.com>
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Demian Martin napsal(a):
> I confirmed that aplay and plughw:0,1 work fine. Aplay and hw:0,1 don't work
> at all.
> 
> And that Xine is the culprit. Now to find out how to fix/work around Xine.
> 
> Demian Martin
> Product Design Services
> 
> 

The older aplay you most likely use does not support 24bit properly.
Install the latest alsa-utils from git and you will be fine.

Perhaps the Xine problem is caused by the passthrough mode. E.g. in
mplayer the hwac3/hwdts output decoders for passthrough run in 16bit
only, but they work actively with the non-audio format. You can check
xine/xinelib code, the alsa output should not be that difficult to analyze.

Regards,

Pavel.