Info.nib
MidiEcho.nib
This example program takes MIDI through serial port B and generates echoes on successive MIDI channels. Note that you must have a synthesizer capable of multi-channel synthesis plugged into the serial port to hear the echoes. You must also be sure to configure your synthesizer to respond on MIDI channels 1-8.
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.