Reader Tracy Evans has put together a tutorial that looks at how to recreate David Gilmour‘s “Sound on Sound” effect, within Ableton Live.
David uses a dual amp setup to perform Shine On you Crazy Diamond and achieve an infinite sustain over which he can play solos.
Here’s an example of how he does this in a live performance:
And here’s Evans’ approach to achieving similar effects with Ableton Live:
You can download the Ableton Live set to create this effect here (.zip), MIDI map an expression pedal to the same controls as shown in the tutorial video, plug in a guitar and “shine on you crazy diamond”.
Nothing says that this technique is for guitars only, either.