How: Output audio to 2 different ports simultaneously?

Discussion in 'Digital Audio' started by dakhed, Feb 23, 2008.

  1. macrumors newbie

    Feb 23, 2008
    Hope I am just missing something really simple.

    I want to have simultaneous output from the USB port and Digital Optical to go to 2 different DACs but the new 'Aggregate Device' won't out put to both.

    been reading about combining inputs but combining outputs or sending iTunes to 2 different ports is not clear to me, I even tried, heard soundflower was needed......

    I tried 2 variations in the aggregate editor:
    1) Built in AUDIO + USB DAC
    2) Sound Flower (2ch) + USB DAC
    and chose these aggregates as the Default Output in the Audio MIDI Setup but...

    I only get output to either Optical or USB, but not both simultaneously. What am I missing?

    And what is Soundflower outputing exactly? how is it different than Built in Audio?

    I also just installed Apple AU Lab and don't get that either.

    Thanks, dakhed

    System: G5 Dual 2.3g PPC, OS 10.4.11
  2. thread starter macrumors newbie

    Feb 23, 2008
  3. thread starter macrumors newbie

    Feb 23, 2008
    No replies. I guess this is not really EASY to do?

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