Recording Session Mix Down: You can now mix a wet guitar recording with its backing track.

Multitasking Support / Background Audio: AmpKit can now keep operating and produce audio when running in the background – perfect for looking at scrolling tab notation in TabToolkit while continuing to play using your favorite AmpKit setup.

Next-generation Noise Gate: Even better control of your favorite high-gain amps and pedals.

Solo & Mix Output Shaping: Toggle between Solo mode, which pumps up bass frequencies for the best possible tone when practicing and playing for fun, and Mix mode, which gives a brighter tone when you want to mix with other instruments for recording or playing with a band.The result: an amazing increase in the fidelity of the incoming guitar signal, and much richer amplified tone, regardless of amp and playing style. Adaptive Input Compensation: : Intelligently restores the bass frequencies lost through the headset circuitry on various iOS devices.Convolution-based Cabinet Simulation: Advanced technology (used in high-end desktop amp simulation software) for highly accurate cabinet simulations that produce even better, more realistic tone and dynamics.Dual-stage Amp Simulation: Doubles the simulation fidelity of all AmpKit amps on newer iOS devices including iPhone 4, iPad 1 & 2, and 4th generation iPod touch.Here’s the list of features (taken directly from Agile Partners’ web site):

Ampkit bass guitar