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 AU-300 by tOSC is a Virtual Instrument Audio Plugin. It functions as an Audio Units Plugin.
Product AU-300
Developer tOSC
Price (MSRP)
Free (Donationware)
Type / Tags
Plug-in, App & Soundware Format(s)
Operating System Availability
Download Released
Downloads Released
Miscellaneous Information
Copy ProtectionNone

AU-300 is an Audio Unit Plug-in-based MIDI-Programmer for some famous Japanese synths from the Mid-'80s. It brings the modern DAW based working process together with the analogue sound of the Roland Alpha Juno Family.


  • Load it in your AU-Host and control the Alpha Juno or MKS-50 just like using a softsynth.
  • All settings are saved in the project file (and restored on load).
  • All parameters can be modulated and automation curves can be drawn.
  • You can save and restore .aupresets files and manage them on your computer.
  • If your Host is supporting MIDI learn, map your controller to it. This is usually only possible with Sysex-capable controllers.
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