Origin Effects MAGMA57 Amp Vibrato & DriveMaker: Origin Effects Model: Cali76 Compact Bass Condition: New Description: Rich Amp style Drive and True Pitch Modulation Packing amp style overdrive and true pitch modulating vibrato into a rugged stompbox, the Origin Effects Magma57 is designed to perfectly complement practically any amp you plug into. There's a lot to explore here, and thankfully it's all easily accessible. On the front end, you have controls for Output, Tone, and Drive.