http://www.bugbrand.co.uk/pages/electronics.htm
Ik wil dit schematje maken, maar ik raak er niet aan uit waarvoor het onderste deeltje (IC3D, IC3E, IC3F) dient...
en hoe ik het moet verbinden
samples
http://www.bugbrand.co.uk/audio/bugcrusher/bugcrusher_606.mp3
http://www.bugbrand.co.uk/audio/bugcrusher/bugcrusher_voice.mp3
Ik wil dit schematje maken, maar ik raak er niet aan uit waarvoor het onderste deeltje (IC3D, IC3E, IC3F) dient...
en hoe ik het moet verbinden
samples
http://www.bugbrand.co.uk/audio/bugcrusher/bugcrusher_606.mp3
http://www.bugbrand.co.uk/audio/bugcrusher/bugcrusher_voice.mp3
The BugCrusher - Audio rate Sample & Hold for Bit Crush effects
Refer to the AD781 Datasheet
I'd wanted to make some sort of bit-crusher effect for ages, but never quite figured the way to use microprocessors or ADC/DACs. And then I came across the Analog Devices AD781 Sample & Hold Amp and it struck me that running this at audio rates would effectively give a simple means of changing the sampling rate - not true bit-crushing but it sounds great!
The AD781 is very easy to implement. All you need is a 5v trigger pulse at whatever rate - this must, however, be of very narrow pulses, so I used a 40106 chip (with 5v supply) to make a narrow pulse osc. You also need to keep the pulses narrow to avoid signal bleed through. From this point I added a Voltage Controlled Resistor onto the circuit to make the Trigger Osc voltage controllable. These circuits were designed for my modular system - they run off a +/- 12v bipolar supply
The 1st circuit is the simple stand-alone - simple & very effective. The 2nd circuit adds voltage control to the 1st circuit (along with some tweaks for the particular application). An LM13700 is used for a floating VC Resistor (resistor values found by trial & error!) and this is driven by a log converter based on a Ray Wilson Music From Outer Space schematic.
I daresay there's some refinements possible - please get in touch if you have ideas on how to make this better.!.
Steven Roeder has done a very compact stripboard layout for the stand-alone BugCrusher circuit - find it here
http://www.bugbrand.co.uk