Resource Library

Service Manuals

PSS-460 Service Manual
DigiTech-DSP-128-Plus-Schematics
Mattel Synsonics Service Manual

UMR2 Documentation

UMR2_Ultimate Manual
Highly Liquid UMR2 Keyboard Matrix Explained
UMR2-User-Manual-RevC-V1.0
Highly Liquid UMR2 MIDI Retrofit – Yamaha PSS-470
Highly Liquid UMR2 MIDI Retrofit – Casio SK-1
Highly Liquid UMR2 MIDI Retrofit – Teisco SX400