GarageBand User Guide
- Welcome
-
- Play a lesson
- Choose the input source for your guitar
- Customise the lesson window
- See how well you played a lesson
- Measure your progress over time
- Slow down a lesson
- Change the mix of a lesson
- View full-page music notation
- View glossary topics
- Practise guitar chords
- Tune your guitar in a lesson
- Open lessons in the GarageBand window
- Get additional Learn to Play lessons
- If your lesson doesn’t finish downloading
- Touch Bar shortcuts
- Glossary
![](https://help.apple.com/assets/626AF5180443DA5E80375464/626AF5190443DA5E8037546C/en_GB/8326ebf9ac4b7010ffff4334ce27feb5.png)
Bass Amp Designer signal flow in GarageBand on Mac
Bass Amp Designer features a two-channel design — one channel for amp (which includes the pre-amp, power amp, cabinet and microphone) and one for the direct box. You can use these independently or blend them using the Blend controls at the bottom of the plug-in window. The two channels are always used in parallel unless the Blend slider is set to the far left or far right position.
![Bass Amp Designer Blend slider](https://help.apple.com/assets/626AF5180443DA5E80375464/626AF5190443DA5E8037546C/en_GB/71bb4df47d03617c9f414e52f1b9500b.png)
By choosing one of the Direct models from the Cabinet pop-up menu, you can remove the cabinet and microphone from the signal flow, sending either the pre-amp alone or pre-amp and power amp signal to the Channel 1 output.
When you choose Direct (PowerAmp Out) from the Cabinet pop-up menu, the Channel 1 routing goes to the pre-amp and power amp, with no cabinet or mic model. When you choose Direct (PreAmp Out) from the Cabinet pop-up menu, the Channel 1 routing goes to the pre-amp, with no power amp, cabinet or mic model.