Using Synthesizers
From the Insert menu, choose Soft Synth to add a soft synth bus control to the Mixing Console window.
Each soft synth bus control can represent a VST instrument or ReWire device application.
A VSTi soft synth bus control is like a virtual synthesizer module where you can route tracks. In the same way you can route a MIDI keyboard to an outboard synthesizer module, you can route each MIDI track to any soft synth you have set up for your project or play a soft synth with an external MIDI controller.
A ReWire soft synth bus control connects a ReWire device application with Acid software, which serves as a ReWire mixer application. When Acid software hosts a ReWire device application, playback is synchronized between the two programs, and the ReWire device application's audio is output through the Acid mixer. With ReWire 2.0 devices, you can also route MIDI tracks to synths in the ReWire device applications.
Use the soft synth bus control in the Mixing Console window to mute, solo, add effects to, and adjust the volume of each soft synth.
NOTE You can add up to 32 soft synth bus controls to your project. If the project includes VST instruments with multiple outputs, each output is added as a separate soft synth bus.
Using VST instruments
Automating VSTi parameters
Using ReWire devices
Adjusting a soft synth channel strip
Using external MIDI devices
Routing a track to a soft synth or MIDI port
Editing soft synth properties
Adding plug-ins to a soft synth
Last modified on July 01, 2026
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