SKU: 61650992620

MSW SY-1 / Pearl Syncussion Expanded I/O interface

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Description

MSW SY-1 / Pearl Syncussion Expanded I/O interfaceExpanded 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

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

 

 

 

 

 

 

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SKU: 61650992620

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Dawn H
Cuba, US
★★★★★ 5
Cool and comfy!
Color: 01-grey, Size: 20" X 26" (Pack of 2)
Very comfy and cooling. Great for hot sleepers!
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Reviewed in the United States on June 3, 2026
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Omaha, US
★★★★★ 5
keeps pillow secured and cool
Color: 05-purple, Size: 20" X 26" (Pack of 4)
just what I was looking for. A cooling pillow case with a zipper! my regular pillow cases slipped off my pillows So annoying. Now my pillows are staying put zipped in. so soft and cool. no more wrestling with the pillow case while trying to flip my pillow over trying to find a cool spot.
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Reviewed in the United States on May 7, 2026
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Chris
Boise, US
★★★★★ 4
Color is off, feels decent
Color: 07-beige, Size: 20" X 26" (Pack of 2)
Feels nice and very cooling to the touch. Although you can tell it definitely isn't cotton. I ordered the color beige but it is much more of a cream color.
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Reviewed in the United States on February 23, 2026
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Amazon Customer
Natrona Heights, US
★★★★★ 5
Good quality and value!
Color: 01-grey, Size: 20" X 26" (Pack of 2)
Washed nicely and cooled pretty well! Love thaf they stay on the pillow for my ASD son. Just what I was looking for! Would recommend!
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Reviewed in the United States on May 18, 2026
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DAVID
Massapequa, US
★★★★★ 5
Great case
Color: 03-dark Grey, Size: 20" X 26" (Pack of 2)
Love these pillow cases! FYI: 20" X 26" are PERFECT for supposed "queen size" feather pillows. 20" x 30" ones are too big and allow the feather pillow to flatten out too much. There is a bit of stretch to the cases. The "cool side" of the pillow case IS NOTICEABLY COOLER than the other side. Good zipper.
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Reviewed in the United States on March 31, 2026

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