Positive Grid JamUp Plug - Audio Interface for iPad, iPhone Download JAMUP and BIAS on 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 all iPad and iPad mini, iPhone 3GS and up, and iPod Touch 4th gen and up.