Analog sound cards are not supported, especially not the on-board variety. The parallel port support is handy, and I am probably it's biggest supporter! It certainly makes it easy to homebrew an interface for COS/PTT/AUX (or even use an IRLP board), but you'll still need a CM108 or CM119 USB fob to handle the audio. You won't need to modify the fob under most circumstances. 73, Kyle Yoksh K0KN Olathe, KS Allstar 2210-2219 --- Original Message --- For bench testing / monitoring / whatever purposes, can I use on-board audio devices? I see the chan_simpleusb/usbradio can use the parallel port for COR and PTT, I'm wondering if I can also use on-board audio... Assume the on-board device is supported by OSS. Couple use-cases: * bench-test / local monitor -- computer speakers, computer microphone * base-station / dispatch console * audio to a control-RX input on a collocated repeater controller -Matt-