<div dir="ltr">> If there is a schematic for any poly-mod, each OBX-a voice would require a VCA for mod depth, and a couple of analog switches to choose between filter<div>> envelope and OSC2 sources, plus some more analog switches to choose the destinations. Not only would the VCA need a dedicated CV in the patch, but </div><div>> those switches would need a few bits of storage to select the modulation path in each voice.<br><div><br></div><div>Double the components, CV, and logic controls for the split/layer feature that the OB-Xa has.</div><div><br></div><div>MC</div></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Thu, Oct 2, 2025 at 10:19 PM brianw <<a href="mailto:brianw@audiobanshee.com">brianw@audiobanshee.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">Agreed.<br>
<br>
If there is a schematic for any poly-mod, each OBX-a voice would require a VCA for mod depth, and a couple of analog switches to choose between filter envelope and OSC2 sources, plus some more analog switches to choose the destinations. Not only would the VCA need a dedicated CV in the patch, but those switches would need a few bits of storage to select the modulation path in each voice.<br>
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Brian<br>
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On Oct 2, 2025, at 6:36 PM, Michael E Caloroso wrote:<br>
> I have never heard of an OB-Xa mod that adds P5-style polymod. Frankly it would be useless unless a new programmable CV for mod depth can be implemented.<br>
> <br>
> MC<br>
> <br>
> On Thu, Oct 2, 2025 at 3:14 PM ulfur hansson wrote:<br>
>> i came across this matrix-synth post that features images of an obx-a fitted with a mysterious JL-Cooper mod, allowing for prophet-5 style poly-mod.<br>
>> <br>
>> does anyone happen to have any information on the kits design?<br>
>> <br>
>> ...or if i should end up feeling brave and design a board to achieve something similar - any thoughts?<br>
>> <br>
>> thanks y'all!<br>
>> sincerely,<br>
>> -úlfur<br>
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<br>
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