How can I improvise a low pass filter out of the EQ on my HD500 so that I can get only the E and A strings, like we get in the polyphonic mode in the Boss OC-3 pedal?
I've been trying to emulate the polyphonic mode found on the Boss OC-3 on my HD500.
I'm running two parallel effects lines, with a graphic EQ as a low pass filter on one (to get just the E and A strings) and a hi pass on the other (just to give some presence while trying to retain the natural sound as much as possible). My signal chain on the bass side is the EQ and a bass octaver running into a Flip Top amp (which has the bass boosted and mids, treb and presence turned off).
While I've gotten 70% there, I've run into some expected problems, mainly with the way the improvised low pass filter is working (it doesn't completely eliminate the other strings), because of which there is a constant compromise between the levels of the two channels, which either results in
1) the unwanted octaved D,G,B and E strings leaking in (if I want a stronger bass sound), which clashes horribly when I play chords, or
2) a softer bass sound with a trebly, unpleasant characteristic (owing to the EQ settings on the second effect line).
Any ideas on how to get around this problem? Any insight would be appreciated. The video I've attached demonstrates the sound I'm aiming at (it's time-stamped)