User Guide

Using Portamento on a Mono Synth
MIDI 1U responds to standard MIDI CC Portamento commands, allowing it to operate in portamento
mode. This slews the voltage change (with constant time) between pitches in a mono synth. Send
standard, channelized, MIDI CC messages from your DAW, sequencer or controller to turn that
channel’s Mono Synth Portamento on/off, and to set the portamento time. Specifically:
● CC 65 (Portamento Control) on MIDI Channel “x”.
Value 127 = Turns MIDI 1U Portamento ON for the mono synth assigned to channel ”x”
Value 0 = Turns MIDI 1U Portamento OFF for the mono synth assigned to channel ”x”
● CC 5 (Portamento Time MSB) on MIDI Channel “x”.
Values 0-127 = Sets the MIDI 1U’s portamento time from 0 seconds (CC 5 = 0) to about 1.1
seconds (CC 5 = 127), slewing the pitch output voltage from the mono synth assigned to
channel ”x”.
MIDI 1U System Manual 22