Expanded I/O Interface for MSW SY-1 or Original Pearl Syncussion

Features:

CV input to filter frequency or Decay
Split outputs (Stereo) or Original Mixed outputs
Split Trigger Inputs (stereo TRS, Left Trig 1, Right Trig 2)
Split Tune Inputs with V/O Trim (stereo TRS, Left VC 1, Right CV 2)

Includes: SY-1 EX: Interface, 2m TRS 3.5mmm MIDI Cable, 2x 3.5mm to 1/4" TRS adapter

Installation instructions:

The main output can be configured in 2 different ways:

Original Syncussion Configuration:

This has the two voices MIXED into a MONO output.

Modification to SY-1 Board: None.
Modification to MIDI Board: Connect the supplied jumper to the shorter header pin 1 on one end and the two pin header on the other

Mod Syncussion Configuration:

This has the two voices SPLIT into individual channels via a TRS 1/4" Phone plug (TRS to 2x TS Phone plug required)

Modification to SY-1 Board: Remove R145 and R146 (upper right corner of control board)
Modification to MIDI Board: None

Connect the 2 pin header with short wires to the pads left by R145 and R146 as shown below

Channel 2 Pitch Control:

To control the pitch of the second voice, a resistor needs to be removed and the CV control for that channel must be connected

Modification to SY-1 Board: Remove R2 on control board, replace with wire to MIDI board (CV2)
Modification to MIDI Board: None

Channel 1 and 2 Mod Wheel destinations (optional):

MIDI Mod Wheel can control one additional parameter per voice

Instructions for these mods are located in the BOM, MODs tab:

Michigan Synth Works SY-1 1.1 BOM OFFICIAL - Google Sheets

Xena OLED upgrade

You might also like