>Psychtoolbox>PsychDemos

BasicSoundChannelHoppingDemo([nrChannels][, device])

Opens a multi-channel sound card for output, then uses audio slave devices to
output a mono beep tone to each audio output channel in succession, “sweeping”
or “hopping” over all speakers / output channels of the sound card.

Press and hold a key to exit.

Optional parameters:

nrChannels = Number of channels to hop over. Tries to open first suitable audio
device with nrChannels output channels if ‘device’ is omitted.

device = Sound device index to choose. Will select ‘device’ by matching ‘nrChannels’
if omitted, or first audio device if both ‘nrChannels’ and ‘device’ are omitted.