Use the amp microphone in GarageBand on Mac
Amp Designer provides seven virtual microphone types. After choosing a cabinet, you can set the type of microphone to emulate and place the microphone, relative to the cabinet.
The Mic pop-up menu is near the right end of the black bar. The microphone placement graphic appears when you move your pointer in the area above the Mic pop-up menu.
By default, the microphone is placed in the center of the speaker cone (called on-axis). This placement produces a fuller, more powerful sound, suitable for blues or jazz guitar tones. If you place the microphone on the rim of the speaker (called off-axis), you obtain a brighter, thinner tone, making it suitable for cutting rock or R&B guitar parts. Moving the microphone closer to the speaker increases bass response.
