This video demos some live remixing on the iPhone with SoundTrends' Looptastic Gold.
Here's what Soundtrends has to say about Looptastic Gold:
Looptastic is a performance remix tool for the iPhone and iPod Touch. Tear apart tracks with your fingertips. Crossfade and filter. Play live through headphones or speakers. It’s a party in your pocket.
60 loops from world-renowned producers of electronic music
6 remixable tracks, each with 10 loops or “stems” that you can control individually, including drums, bass, synthesizers, and vocals
Free download of 10 more loops from Jordan Rudess using the Loop Store
In app previewing and purchase of even more loop sets
Combine loops between sets. Play up to 20 at the same time.
Mix recording for future playback and overdubbing
Export your mix to Mac or PC via Wi-Fi
Multitouch mixer with three zones and dj-style crossfader
Cool filter effects with control of frequency and resonance (low pass, high pass, band pass, notch)
Pricing and Availability
Looptastic Gold is a free app, and it's available now in the App Store. SoundTrends offers additional sample libraries as "in-app" purchases.