Henry the Noise Box (http://www.youtube.com/watch?v=nvrEZd5LhPA#lq)
Any questions, please ask - it's pretty self explanatory...
What generates the clock signal that you mention? Also what does the clock signal control?
The box with the face on is just a Maplins 555 Sequencer kit with a couple of mods - That provides the clock in. The clock in controls that 'flutter' sound when various switches on the breakout box are flicked.