By default adoutput~ outputs the audio driver's channel 1 out its left outlet and channel 2 out its right outlet. Optional arguments specify the channels you want. Remember, these are not the logical channels used by dac~ and adc~-- they are the audio driver object's "real" channels. A channel number of 0 turns off an output. Channel numbers higher than the number of real channels of the current audio driver also result in a zero output.
The arguments specify output channels of the current audiodriver. There is no limit to the number of channels you can specify. By default, adoutput~ creates two outlets and assigns the audio output from channels 1 and 2 of the current audiodriver to them. Note that these channel numbers are not the same as the logical channel numbers used by the dac~ and adc~ objects, but represent the "physical" outputs of the driver after any remapping has taken place. You configure the relationship between logical dac~ channels and the audiodriver's real channels with the I/O Mappings subwindow of the Audio Status window.
Common Box Attributes
Each outlet of adoutput~ outputs a signal from the assigned audiodriver channel, delayed by the number of samples of the current signal vector size.