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Here’s what they have to say about TC-Performer:

Explore unreal synthesis with the most unique performance control on iOS! TC-Performer presents a multi-touch performance environment unlike any other synthesizer. Simply touch the screen; there are no buttons, keys, or sliders to hit. The sounds are generated entirely by your touch movements.

Each patch has a unique method of control. Pull, tap, drag, twist, and stretch your touches on the screen. There is no wrong way to play! Every instrument is a new landscape of sound creation. Pads, leads, effects, and indescribable oddities await.

You can download more patches in packs inside the app. There is also a transposition section available to change the key of the patch to fit your song, and Audiobus compatibility to record via inter-app audio.

TC-Performer is a free download. If you like the app’s approach to multi-touch control, but want editing features, check out TC-11.