[thetalm]

Hi all, I wish to enable MP3 passthrough over HDMI to let my Denon receiver doing decoding & D/A conversion.

My configuration is Acer Revo 3600+Ubuntu Karmic+Dharma.
All is working well, including AC3 passthrough.
I only want MP3 music is sent out completely untouched, without any conversion to PCM.

I'm aware that in Dharma release notes is stated:

"Removed AAC, MP1, MP2, and MP3 passthrough options settings from the GUI"

I understand the option is still present even if not GUI-accessible.
in my guisettings.xml file, the <audiooutput> section reports:

<audiooutput>
<ac3passthrough>true</ac3passthrough>
<audiodevice>alsa: plug:hdmi</audiodevice>
<channellayout>7</channellayout>
<customdevice>IEC958</customdevice>
<custompassthrough></custompassthrough>
<dontnormalizelevels>false</dontnormalizelevels>
<dtspassthrough>true</dtspassthrough>
<mode>2</mode>
<passthroughaac>false</passthroughaac>
<passthroughdevice>alsa:hdmi</passthroughdevice>
<passthroughmp1>false</passthroughmp1>
<passthroughmp2>false</passthroughmp2>
<passthroughmp3>false</passthroughmp3>
</audiooutput>

Reading the wiki, I discovered that I can override some guisettings setup by inserting the ovverrides in advancedsettings.xml

I saved in advancedsettings.xml (in the same dir of guisettings.xml) the following lines:

<advancedsettings>
<audiooutput>
<passthroughmp1>true</passthroughmp1>
<passthroughmp2>true</passthroughmp2>
<passthroughmp3>true</passthroughmp3>
</audiooutput>
</advancedsettings>

But MP3 music still outputs in PCM format to my receiver (i can see it on Denon display).

Where am I wrong ?
Thank you for any help

[thetalm]

Bump...
Nobody can help me?

[d3structivepyr0]

Sorry to bring up an old thread, but did you figure this out? I have updated my nvidia driver and changed my advancedsettings to enable mp3 passthrough, but my denon still sees PCM.

[jmarshall]

It likely only works with audio in videos (if it works at all), and it likely offers you no advantage whatsoever to do it in this way.