The GP-100 has 200 user programmable (001 to 200) and 200 preset patches (201 to 400). To scroll through patches one at a time, rotate the NUMBER knob. Pressing the NUMBER knob in while rotating it will change patches in increments of 10. Check out the following patches:

1. 001 CLASSIC STACK - 1959 Marshal stack with realistic dynamic control.

2. 002 JC-120 Clean - Original sound of the Roland JC-120 Jazz Chorus amplifier.

3. 007 5VOICE HARMONY - Thick harmony in the key of C.\

4. 011 BOOGIE LEAD - Mesa Boogie Lead channel with stack.

5. 012 VINTAGE TWIN - Classic Fender Twin with 2 x 12" speakers.

* All products are trademarks of their respective companies.