Gary, I see what your saying. Your thinking the outputs of the keyboards are being routed through the pedal and then from the pedal to the amp.

On the Tyros and the Triton, there is a stereo input specifically for pedals which as far as I know, do not intercept the input/output signal.

Al

The master volume on most amps, keyboard or otherwise, is usually prior to the the output transformer used to drive the speakers, mainly in the primary circuit of the amp's final stages. The input volume controlled through the mixer is most often a small, 20K-ohm pot that dampens the signal, then passes it through the EQ circuit, through the Pan circuit, through a pair of blocking diodes, and finally through the main gain and outputted into the output transformer's primary coils. The secondary coils are what then sends the signal to the speakers--at least that the way my Peavey's, Crates and Polytone amps are wired. I'm not sure about some of the other brands, but I did run across a keyboard several years ago that had a positive ground, which was used in some systems in the early days of keyboards. You couldn't even connect this particular keyboard to an amp that had anything other than a floating ground without blowing a circuit breaker. I rigged a resistance mixer with blocking diodes for the guy and he was able to then plug into most PA's without encountering a problem. The only test to determine the safety of hooking a "Y" connector to a single foot-volume control would be to measure the electrical potential betewen both keyboards using either a voltmeter or an oscilloscope. He could get lucky and everything might be OK, but I would be very cautious about this one.

Gary

This is exactly what I need:

YPP-308 STEREO ¼" PHONE (FEMALE) — TWO STEREO ¼" PHONE (MALES), 6 inches


Thank You, Thank You, Thank You!!!!!!
Regards,
Al

Hmmm,
I was talking a passive easy-in easy-out volume pedal, not a dedicated TRS type pedal that connects to a special jack. You can get a stereo volume pedal (Roland used to make one ... I think they still do)that has 2 ins and 2 outs. They are passive inputs and require no additional worry or connections. Use "Y" cords or sub mixers ... it won't matter. Just plug and play - couldn't be simpler.