This video demonstrates how to control vintage analog synths, like the Roland Alpha Juno, using an iPhone.

Why would you want to do that?

One reason could be to make programming an entire generation of knob-free synths a lot easier.

Another reason could be to add new performance capabilities for synths that are knob-challenged.

via kosmotikshokk:

I’m controlling my Alpha Juno with the TouchOSC iPhone app, connected to puredata on my computer via the standard OSC protocol. This pd patch will work with the Juno 1 or 2, or the MKS-50 rack version. The same principle could be applied to any synthesizer with MIDI control.

Get the pure data patch here (requires “pd-extended” distribution): http://sites.google.com/site/kosmotikshokk/junOSC.pd

Get the touchOSC template here:
http://sites.google.com/site/kosmotikshokk/junOSC.touchosc