> From: conorstrachan@...
>
> Paul you were right with the 4051, I swapped Z4 into Z3 and
> now the envelope depth is working! Many thanks!
>
> Just one question what uses The 4051 in Z4?

You can find the schematics on the rhodeschroma.com site. Here are all the assignments, sorted by slider position, left to right, with the non-slider inputs at the end:

pin in source
------------------
Z3-12 3 Master
Z3-13 0 Osc 1 Pulse Width
Z3-14 1 Osc 1 Pulse Width Mod
Z3-15 2 Osc 2 Pulse Width
Z4-1 4 Osc 2 Pulse Width Mod
Z4-2 6 Sweep Rate
Z4-4 7 Filter Cutoff
Z4-5 5 Filter Resonance
Z4-15 2 Filter Sweep Depth
Z4-14 1 Filter Env Depth
Z4-13 0 Filter Kybd Track
Z4-12 3 Envelope Attack
Z5-1 4 Envelope Decay
Z5-2 6 Envelope Sustain
Z5-4 7 Envelope Sustain Decay
Z5-5 5 Envelope Release
Z5-12 3 Volume Envelope Attack
Z5-13 0 Volume Envelope Decay
Z5-14 1 Volume Envelope Release
Z5-15 2 Assignable
Z3-5 5 Lever 1
Z3-1 4 Lever 2
Z3-2 6 Pedal
Z3-4 7 Battery

Z5 is on the right board. Here's the same list, sorted by input number.

pin in source
------------------
Z3-13 0 Osc 1 Pulse Width
Z3-14 1 Osc 1 Pulse Width Mod
Z3-15 2 Osc 2 Pulse Width
Z3-12 3 Master
Z3-1 4 Lever 2
Z3-5 5 Lever 1
Z3-2 6 Pedal
Z3-4 7 Battery
Z4-13 0 Filter Kybd Track
Z4-14 1 Filter Env Depth
Z4-15 2 Filter Sweep Depth
Z4-12 3 Envelope Attack
Z4-1 4 Osc 2 Pulse Width Mod
Z4-5 5 Filter Resonance
Z4-2 6 Sweep Rate
Z4-4 7 Filter Cutoff
Z5-13 0 Volume Envelope Decay
Z5-14 1 Volume Envelope Release
Z5-15 2 Assignable
Z5-12 3 Volume Envelope Attack
Z5-1 4 Envelope Decay
Z5-5 5 Envelope Release
Z5-2 6 Envelope Sustain
Z5-4 7 Envelope Sustain Decay

So now, Osc 1 Pulse Width Mod shouldn't work, since pin 14 on the 4051 is blown out.

--

Ciao, Paul D. DeRocco
Paul mailto:pderocco@...