This is a presentation showing the commission project I produced for Hannes Pasqualini from Paper Noise. If you would like one similar or have any other equipment you would like modifying, please contact me.
Commission SpecificationsCommissioned by Hannes Pasqualini fromPapernoiseModify a Casio VL-tone to include:• A low pass filter• Two audio oscillators, with patch bay• Voltage starve• As many circuit bends as possible• Mounted in a customised wooden case
Selecting a boxI had a selection of boxes in my workshop, luckilyI managed to find the exact size box that didn’tneed many modifications.
Top Panel DemoA wooden insert panel was made using ply woodand cut to size with a disc saw. The knobs wereused to keep a scale of perspective. The gaparound the edge of the keyboard is 1mm.
Panel Demo Design I made a quick sketch using word to show how the insert panel would look. AUDIO OUT ON/OFFMOD 1 RESETPITCH MOD 2 PITCH PITCH 1 &2 1&2 POWER PATCH BAY CIRCUIT BEND 1-11MOD 1 MOD 2
Panel Design OSCILLATOR A OSCILLATOR BOSCILLATOR A PITCH A Pitch B RESET POWER PITCHOSCILLATOR AMODULATION OSCILLATOR B PITCH FREQUENCYOSCILATOR A OSCILATOR B L.P.F. FEEDBACK STUTTER BASS STUTTER FOLLOWER BASS FOLLOWER The panel design was finalised in power point, the page size was set to the same size as the panel. The file was converted to 16-bit BMP format with the colours inverted. This is so that the file is compatible with the marker laser.
Box LogoThis is the Paper Noise logo. However, I forgot toinvert the colours, which meant that I had to make anew plywood panel and re-etch the surface.
Oscillator Circuit DiagramsI used two oscillators on this keyboard. The first was aHex Schmitt Inverter Oscillator and the second was astepped tone generator (atari punk console). Beloware the two circuit diagrams I used.
Low PAss Filter SchematicThe low pass filter is a passive design, this means itdoesn’t need any power to operate, the drawback tothis design is that it reduces the output signal by anoticeable amount. The resistor used was a 10K potentiometer, so the frequency could be adjusted.