MidiPipe for Mac

From SubtleSoft:

MidiPipe is freeware and comes with no warranties. It has been well tested and has shown no major problems, but is not finished. It can be useful in a music studio or on stage.

• Midi In - connects a MIDI input to the pipe
• Midi Out - connects a MIDI output to the pipe
• AList - outputs messages to the screen
• Message Converter - converts messages from one type to an other
• Delay - delays the time for when the message is scheduled
• Transpose - transposes note to multiple keys, set velocity, delay and channel for each
• Message Filter - filters by messages
• Channel Filter - filters by channel
• Channel Router - routes channels
• Keyboard Split - moves note on/off messages above/below a split point to a different channel
• Randomizer - randomly changes any parameter value(s) of any channel message(s)
• Keyboard - play a on screen keyboard with your mouse or keys; will display arriving messages too
• MicroTuner - apply different scales
• Set - set any parameter value(s) of any channel message(s) to any value
• Duration - add a delay between Note On and Note Off messages
• Control Split - inverse, limit, scale, fade in/out, route and map MIDI controllers
• Control Slider - simple slider for control message input
• AppleScript Trigger - use the power of AppleScript to implement everything you want
• (N)RPN Mapper - map (N)RPNs
• Velocity Modifier - scale, shift, and clip the velocity of Note On and Note Off messages
• SMF Player - plays up to 128 MIDI Files; handles Song Select, Start/Stop/Continue messages
• Key Mapper - map keys
• DLS Synth - user interface for Apple's DLS Synth
• Double Filter - filters identical messages
• Monophonic - make monophonic