Hi Rich,

There really should be a Tascam ASIO driver that you can use. If you don't see one, then the device's drivers aren't installed correctly.

That being said, ASIO4ALL will play through whichever device you tell it to. In the ASIO Audio Drivers window, you'd select ASIO4ALL and click the ASIO Driver's Control Panel button. A window will appear where you can select which device yo'd like to use.

Thanks
Kent
PG Music