waylo MIDI plugin pack is a free studio tools VST, Audio Unit plugin developed by sean wayland waylo software. Compatible OS(s): macOS.
WayloChilli:
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A MIDI plugin that stores the last note played. The next note is created relative to the note played. Middle C will repeat notes. C# will move the notes up a half step. D will move them up a whole step. B next to middle C will move the next note down by a half step. Better tried out than explained.
Midi Latch:
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A MIDI plugin that acts as a MIDI latch/hold. A “note on ” message is converted to a note off for any playing notes. A “note off ” message sends a note on if a note is not playing and sets it to “playing”. This allows you to quickly play a chord and it will sustain until you play a new chord. Deactiviting the plugin will kill the last chord played.
Midi WayloSynth:
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A MIDI plugin that allows the bottom half of the keyboard to transpose the top half.
http://www.seanwayland.com