are there any central resources on how one would map an object in Jitter [Gl and otherwise] so that you could visually control MSP/MIDI/AUDIO?

I see tonnes of audio reactive patches, but can't find too many useful resources on how visuals could control audio [such as animating or moving a graphic to produce sound]

I understand spill/peek/poke seem to be central to this - but anybody got some tutorial links/advice from outside the documentation?

Many thanks