I've downloaded the MultiMode demo. My SignaLink is connected to the FT-857D via the Data port, It's USB goes to the iMac's USB. The Signalink's speaker jack goes to the radeo's speaker jack. I can hear the CW audio coming through the iMac speakers, but the CW is not being decoded. I am not sure if the SignaLink is connected properly. In 1983, used a program called "SupeRat" with my Apple lle computer. The program was also multi mode and worked perfectly. If I can get the program to work properly with the SignaLink, I definitely would consider purchasing it.