FCP Pro Studio HD and all the fixings with that. I used a variety of apps from Compressor to MpegStream clip to Quicktime Pro 7 and ffmpegX and came up with the following varieties for testing. I named the files according to how I transcoded them in the process. not one gave any audio at all, not even the hissing ones.so the audio results below are relating to the tower's speaker and the SPDIF connected directly to the tower at the same time. iTunes does a great job of playing full-rez WAV stereo using the Mac's audio as well as external interfaces, so encoded material should work as well.Īll the following files failed playback through Airport Express/iTunes. If you can make the above work, which should be no problem, the next test would be to import that same audio in WAV format into iTunes and try it again. It is just two channels, L & R as far as the hardware is concerned. Whether connected optical or analog makes no difference. What two-channel encoded formats are you aware of that are supposed to work with iTunes? Dolby Digital? That's the most common for consumer applications.Ĭan you play encoded material from your Mac to a surround decoder in any other application than iTunes? Any two-channel playback app or editor should be able to do this if the recorded material is encoded with the same format as your decoder. Since iTunes strictly handles two channels of audio, if 5.1 claims are being made, it is playing back two-channel encoded surround. However, I specialize in broadcast work with surround encoding so I am very familiar with the technology. I do not have specific knowledge of iTunes' ability to pass along two-channel encoded surround to a decoder, such as that in a surround receiver. So I guess Airplay/iTunes 10.x doesnt actually do 5.1? nor with iTunes read and playback a 5.1 thru optical direct as opposed to wirelessly? Havent managed to figure out how to stream to my network using the Streaming wizard of VLC yet, so thats only a prospect.
Playing to a N- Airport Express hooked up optically to a 5.1 surround stereo system and using latest iTunes.Īlso have the Mac tower connected optically to a 5.1 stereo for previewing and editing in surround I cannot seem to send audio of any sort in playback from a stereo coded.
aac, etc etc and confirmed in metadata of multiple channels including some 6 channel discrete attempts.Īlso tried the Chris Breen routine by setting up Audio Midi, used his code suggestions for A/52 in terminal, setup the output in Sound prefs pane, and all that other stuff.Īgain, kind of useless if this doesnt in fact work. I also thought I read somewhere that Airplay will wirelessly send to express/extreme units in 5.1 surround. I have tried all manner of transcoding of commercial and homemade 5.1 surround (done with Soundtrack Pro) and not gotten a wrapper or codec combination that works with the supposedly 'new playable 5.1 surround' iTunes.
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