Following these two related threads:

I`ve done some tests,

Using ASIO everything works as expected:

list devices to a txt file:

pd -asio -blocksize 256 -listdev -stderr 2> asio.txt -send "pd quit"

Call the device by name:

pd -asio -blocksize 256 -audioaddoutdev "ASIO:M-Audio USB ASIO"

note the “ “ for spaces in the device name.

Problems come with MMIO:

list to file OK,

pd -listdev -stderr 2> list.txt -send "pd quit"

This will name i.e: A, B and C.

When calling -audioaddoutdev “A”, I get “B” and when calling “B” I get “C”.

Not sure if this is a “Pd” thing or a “portaudio” thing.

Salutti,

Lucarda.