Positive Grid JamUp - Audio Interface for iPad, iPhone and iPod touch Download JamUp Guitar Multi-FX App for Free at iTunes App Store. Zero-latency and optimized circuit for guitar and bass. Special design feedback cancellation and ultra-low noise circuit. Works with JamUp, GarageBand, AmpliTube, Ampkit and most processing & recording iOS apps. Compatible with iPad iPad2 iPad3 iPad4, iPhone 3GS, iPhone 4, iPhone 4S, iPhone5 and iPod Touch (4th & 5th Gen).