[thewebcount]

FWIW, the iPad is velocity sensitive. I haven't tried Logic Pro on it yet, but with Garage Band, it definitely plays louder if you hit it harder (for patches that support it). Some software synths in GB also have a pseudo-aftertouch where you slide your finger up after hitting the key to invoke aftertouch.

That said, I don't like playing on a screen. I'm a long-time piano and keyboard player so I just hook up an external instrument. But I was pleasantly surprised by what I could do just on the iPad with GarageBand.

[glhaynes]

I wonder if this works by measuring the size of your touch (i.e., how much your finger "splats" when it touches) or using the accelerometers/gyroscope or what.

[c-hendricks]

It just uses the accelerometer, it's just as neat and inaccurate as you can guess.