VoiSona can be used in the following two ways.

Using VoiSona as a Standalone App

VoiSona can be launched and used immediately after installation. Even if you do not have a DAW (Digital Audio Workstation), you can use it with ease.
  1. Install the "VoiSona" application here.
  1. Tap the app icon on the home screen to start "VoiSona."
  1. If you agree to the Terms of Use, tap "Agree and Start the App".
  1. Tap "NEW."
  1. Enter any project file name and tap "Create." The VoiSona editing screen will be displayed, and the project file (.tsmsln) will be saved automatically.
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Saved project files can be found by opening the Files app and navigating to "On My iPhone (or iPad)" > "VoiSona" > "Projects" folder.

Using VoiSona as an Instrument Plug-in

If you have a DAW, you can use it as an Audio Units (AU) instrument plugin. As an example, here's how to use it in "GarageBand".
  1. Install the "VoiSona" application here.
  1. Launch "GarageBand".
  1. Tap "+" (Create Song).
  1. Tap "EXTERNAL".
  1. Tap "VoiSona Song Editor".
  1. Tap the icon in the red frame. The VoiSona editing screen will be displayed.