|
Hi to all Today Max Kellerman confirmed to me that mpd is capable of sending 24-bit audio output in true 3-byte sample format (so not the padded 4 byte samples) without the use of ALSA to do any conversions. As far as I understand it, this native mpd-support for 3-byte samples is for the S24_3LE format. I got his answer as a reply to my request to support true 3-byte sample output I posted on the Mantis bugtracker. Max replied he did not find Mantis suitable to ask questions, so I still have a question remaining I wish to post to you here. How do I configure mpd to make it send 24-bit audio as true 3-byte samples without using ALSA? I could not find any examples on the mpd-wiki configuration page. I assume that mpd is also still capable of sending the 32-bit samples with the 24-bit audio padded with zeroes. This would mean there has to be a switch/parameter indicating that a 24-bit sample size is wanted instead of 32-bit, but I don't know which one that would be. The audio_output section of the mpd.config now looks like this: audio_output {This belongs to mpd as implemented on the PopcornHour mediaplayer with a plugin developed to send the mpd-output straight into the Sigma Design SMP86xx processor. As you can see ALSA is not used here as the output is sent directly to the processor. This processor requires 24-bit audio to be sent in true unpacked 3 bytes per sample little endian format, as S24_3LE would be as I understand it, or in a DVD PCM 24-bit linear PCM as described here ( http://wiki.multimedia.cx/index.php?title=PCM#24-Bit_PCM ) which is somewhat more difficult to implement and also limited to 96kHz sample rate. But Max confirmed that 24-bit audio output in true 3-byte sample format is available as a native format from mpd, so that would be the best one. So can anyone instruct me how to make mpd output 24-bit audio as true 3-byte samples without the use of ALSA? Eagerly looking forward to your reply - aleg |
------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com
_______________________________________________ Musicpd-dev-team mailing list Musicpd-dev-team@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/musicpd-dev-team
