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Create a custom bass amp model in GarageBand on Mac
You can create your own bass amp model using the Amp and Cabinet pop-up menus, located at the bottom of the Bass Amp Designer window. After choosing an amp and cabinet, you can choose and place the microphone, use the bass amp controls, and adjust bass amp effects to further customize the sound.
Note: After you create your own custom bass amp model, you can save it as a custom patch in the Library.