PSR-SX900 / USB audio device / Zoom (for lessons or group play)

[Rcd_WB]

This is just a little bit of my experience using my PSR-SX900 along with a USB audio device, Microphone, and Zoom to interact with others (in my case, as a student taking lessons).

For my Windows laptop computer I obtained a USB stereo Input/Output device. The outputs of the USB device go to the Keyboard's AUX-IN connector, and the Keyboard's MAIN-OUT connections go back to the USB device's inputs (some adapters/cables are needed to go from Keyboard's 1/4" jacks to RCA connectors of the USB device). I also obtained a wireless low-latency microphone which connects to the MIC input on the keyboard. All this audio I/O can be managed with the SX900 mixer. I'm able to hear my teacher through the keyboard speakers, volume mixed with the keyboards sounds, and he can hear me along with my keyboard sounds and vocal (I don't/can't sing, just talk).

This has been working just great for a long time, but just recently, Zoom introduced a "Live Performance" mode, which has potential for better group play, less latency (delay) according to Zoom. However it has introduced an Echoing problem with my setup. Here's why... The audio coming into the AUX-IN inputs (my teacher) is going through the mixer and back out the MAIN-OUT outputs, which is then sent back to my teacher as an echo, just slightly delayed by Zoom and the Internet. I was thinking that the AUX-IN signal could be redirected to the SUB outputs using the MENU->Line Out control panel on the Keyboard, but of the 69 possible items that can be re-directed, the AUX-IN channel is not included (a Yamaha oversight in my opinion).

To cure this problem, I'm going to reorganize the USB device's output to go to my satellite speakers (instead of the keyboard AUX-IN), using some A/B switching apparatus, so that I can switch the keyboard back to the satellite speakers when I'm not taking a lesson.