SimpleSynth

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SimpleSynth is a small and fast synth, perfect for when you want to try out a musical idea quickly. It's got a complete general MIDI instrument set built in, and it can load Soundfonts and DLS files.

Be warned though: I haven't updated it in a long time, so your mileage may vary under Lion and later. If you'd like to contribute fixes, you can find the source code on GitHub.

Released
5 September 2009
Version
1.1
Requirements
Mac OS X 10.4 or later, and a MIDI keyboard