There are plenty of features under the hood, such as resonant filters, delays and envelope. You can enable "stepped" mode to play your sounds like a traditional keyboard, or keep it in "free" mode for some microtonal madness.
Once you've recorded a sound, use the main area of the screen to play it back at different pitches (up to 5 fingers at a time). You can crop the sound by dragging a selection over the waveform. The crop area is also multitouch and you can adjust the crop while playing the sound too.
The y-axis is pitch of the sound, and the x axis is configurable to control filters or envelope.
You can record your performances on Sampletoy and send them via email within the app as a CD-quality wav file (mono or stereo)
Create your own instruments out of any sound.
Email your performances as audio files straight from the app.
Built-in resonant filters, delay and envelope.
Auto-saves current recording and state and recalls it again on next launch.
Stepped mode allows chromatic, major, minor, pentatonic and whole-tone scales to be played.
Totally multitouch - play up to 5 notes at once.
44kHz/16bit - professional quality sound.
Built-in comprehensive manual.
Sampletoy requires audio input, so works only with the iPhone (built-in mic or headset mic) and iPod Touch 2G (headset mic)