marco_jacobs1975 Posted March 27, 2018 Share Posted March 27, 2018 Not so much a question, but a finding which might beneficial for others: the Morley PVA (optical volume pedal) can be used as an expression pedal for the Helix. just connect the expression pedal jack to the output of the Morley using a normal TS-cable.Turn the minumum volume knob to the maximum position. It looks as if the Helix does an auto calibration (fw 2.53). For me, the advantage that the Morley has over other expression and volume pedals, is that it uses an optical circuit instead of a potentiometer. So no mechanical wear. BTW: the 9V dc is used only for the the optical circuit, further signal path is passive just like standard expression pedals. Quote Link to comment Share on other sites More sharing options...
highline-2004 Posted March 29, 2018 Share Posted March 29, 2018 Is that Morley heavy? I have been using my Ernie Ball Volume JR. for pitch shift expression. Quote Link to comment Share on other sites More sharing options...
marco_jacobs1975 Posted March 30, 2018 Author Share Posted March 30, 2018 Yes, the Morley is an all metal casing so it’s quite heavy. I had it lying around and I saw some YT instructions on how to use potmeter-type volume pedals. So I thought this option should be possible too for the optical type. Did some measurements on how the resistance changes. Now I only have to do the mod on the opening inside tge pedal to get a more linear path. Quote Link to comment Share on other sites More sharing options...
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