drmarkod

The Stagescape can be used with EITHER a mometary switch, or a latching switch. I can't recall exactly where that setting is and I'm not in front of the unit right now, but there is a setting for "momentary" under the footswitch set up screen where you select the function that the footswitch is controlling. The Boss FS-6 is a two buttom switch that is ideal for the M-20d http://www.bossus.com/gear/productdetails.php?ProductId=686 The nice thing about this switch is that there is an LED that can signal the state of the switch without looking at the M20. We have also used a momentary switch (i.e. a keyboardist's sustain pedal) to turn off effects, but have the Stagescape set to expect a latching switch. When your foot is depressing the momentary switch, the effects are off. When you release, the effects turn back on. You have to be a little careful about the polarity of the switch. If memory serves me well, if you have the switch plugged in when you turn the Stagescape unit on, the M20d reads the state of the footswitch in the un-depressed state. If you plug it in after the unit is turned on, you may or may not get the results you are expecting (i.e. pressing the footswitch turns ON the effects). Hope that helps. Mark

How about using the Apple Airport Express and streaming the backing tracks from your iPad to the Airport Express, then into the M20d via 1/8 to 1/8 stereo patch cable? This would free the M20d from having to deal with the backing track altogether, except as a stereo input.

Not sure if this is of any importance with the slowed response time, but you noted that you are using a 64 GB card. It appears to me that the max is 32 GB. From a page that lists compatibility of SD cards http://line6.com/support/page/kb/_/live-sound/stagescape-m20d-mixer/wifi-usb-adapter-sd-card-compatibility-an-r112 "The following SD cards are compatible with the M20D: Any class 10 SD card is compatible with the M20D. Only class 10 SD cards formatted as FAT32 are compatible. 32 GB maximum SD storage space"