Isadora Manual v1.3 - TroikaTronix

of the sound in three dimensions – this is best experienced with headphones. If you
have more than two outputs (e.g. a quadraphonic speaker setup), AUMixer3D will
spatialize the sound within the field of that speaker configuration.
1) Click on “Audio” in the Toolbox Filter to show only audio actors in the
Toolbox.
2) Add two AUAudioFilePlayer actors to the scene. Set the sound input of both
actors to the number in the Audio Files Bin of the sounds you want to play.
3) To the right of the AUAudioFilePlayers, add an AUMixer3D actor, and set its
inputs input to 2. This actor allows you to control the volume, azimuth,
elevation and distance of each sound stream, measured relative to the central
point in the current speaker configuration. (Which you selected in the Audio
MIDI Setup application.)
4) To the right of the AUMixer3D , add an DefaultOpututUnit actor. This sends
the mixed sound to the default audio output device.
5) Make links between the AUAudioFilePlayers’ audio outputs and the
AUMixer3D’s audio inputs. Connect a link from the AUMixer3D’s audio
output to the DefaultOutputUnit‘s audio input. As soon as you make this last
link, you will start to hear both sounds playing.
6) Try adjusting the various parameters on the AUMixer3D. Changing the azimuth
should move the sound in a circle around the central point. Changing the
elevation may give a sense of the sound going above or below you (not audible
in certain speaker configurations.) Finally, the distance controls the apparent
distance of the sound from the center point. Higher numbers make the sound get
softer, i.e. it is moving away from you.
7) Set the active input of the DeafultOutputUnit to off the sound.
Setting Up for Multi-Channel Sound in Windows
Vista
• In Windows Vista, install the audio driver for your device using the installer
program that came with the device. Then, after connecting the device, follow these
steps:
1) Go to the main menu (bottom left hand side) and open the Control Panel
window.
2) Click on the QuickTime icon in the list. The QuickTime Preferences window
will open. Click on the “Audio” tab.
3) Click the “Devices” popup menu to select your multi-channel output device.
4) In the “Play Audio Using” menu, select “Direct Sound”,
5) In the “Sound Out” menu, select the output format (Rate and Size) supported by
your audio hardware.
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