Setup
Enable WDM
When first installed, the IF-FW/DM will 4 active stereo pairs of audio through its WDM driver. If you are using a DAW that can- not use ASIO and you want to access all 24 channels of audio, click this option. It may take 1 to 2 minutes for Windows to finish reconfiguring with a total of 12 stereo pairs of WDM audio. This affects the start-up time of the computer as well.
TASCAM IF-FW/DM Owner's Manual 11