Hello everybody,

this question has been discussed here before but up to now to no sufficient result: I would like to use the BOSS FV-500H Volume pedal at the same time as a volume pedal and as an expression pedal for two different effects, a line6 M5 and an EHX memory boy. the FV-500H has dual pots for volume and expression ( and a separate expression pedal input so this is  possible (i have the volume pedal in a loop so i can switch it on or off while using it as an exp-pedal and i also have a little lehle II stereo switcher for switching between the memory boy (needs TRS cabling) and the M5).

The Problem is: due to whatever reason I can either use the FV-500H as a volume pedal and an exp-pedal for the memory boy or as a stand-alone exp-pedal for the m5 since the exp-pedal will only work correctly with the m5 when the volume knob on the FV-500H (which controls the volume of the heel position of the pedal)  is set to maximum. Unfortunately this leaves me with an unusable volume swell range and a non-functional exp-function for the memory boy. at the moment i have to manually turn the knob on the FV-500H to  to be able to use it with the m5 which by itself is not a big deal but since i would like to use volume swells together with pitch bends (think pink floyd's "echoes" middle section) this does not work for me.

I guess the problem could be solved using some simple electronics since it is only the difference between a "min" and a "max" setting on a simple pot that makes it work but I need technical advice so I can tell my local music store tech to build me what i need (which I guess to be not more than a simple bux with an input and an output and a resistor of some sort) Modding the FV-500H is probably not an option since it works correctly with the EHX memory boy and also as a volume pedal.

any help (especially on the values needed and expected by the M5 for the two positions of the FV-500H to work properly other than "passive 10K ohm mono linear taper pot, using a standard 1/4 inch mono instrument cable") is greatly appreciated!

best regards,

Tony

some threads i have found on this issue:

http://line6.com/support/thread/25841

http://line6.com/support/message/254952

http://line6.com/support/thread/81159

http://acapella.harmony-central.com/archive/index.php/t-2822435.html