SynthTronica is a synthesizer app for iPad that provides a full set of tools, including multiple keyboard layouts, a unique multi-touch filter, built-in recording, sound editing and more. The presets are a great place to start (all 92 of them), but you can build an almost limitless library of your own sculpted sounds. With "Formant Distortion Synthesis" and the ability to apply any audio clip as "grooves," you can even take the same synth presets and make them into entirely different synth progressions.
The multi-touch filter makes dynamic sweeps and live modulation a breeze, whether for recording or live performance. The keyboard remains visible while you work the filter, letting you play while doing multiple, simultaneous sweeps and band passes for some very cool effects.
The effects and audio quality in the videos stunned me. SynthTronica packs in a range of advanced features, such as MIDI control capabilities, the ability to share audio data between compatible apps, wireless sync-start technology that allows for wireless start between compatible apps on two iPads, to name a few.
Download From: iTunes App Store ($4.99)