This Module is a prototype or in a concept phase.
Analog drum synth based off Boss PC2
PClone2 from HotchK155 housed behind eurorack panel
•TRIG LEVEL - Sets the sensitivity of the trigger input. The voice circuit responds differently depending on the intensity of the trigger pulse (this is especially nice when tapping it with a finger). The TRIG LEVEL knob controls this response.
•PITCH - Sets the basic pitch of the oscillator. This works alongside the SWEEP controls.
•DECAY - Controls the decay of the volume envelope (so how long the sound takes to fade out after it is triggered) and also controls the sweep time. Sweep, pitch and decay interact in ways that reward experimentation.
•SWEEP AMOUNT - Each time the sound is triggered, the pitch of the oscillator can be swept up or down by a selectable amount. The circuit has a characteristic sweep where the pitch drops low and rises, or starts high and falls. In the original PC-2 a centre-tap potentiometer was used, so the centre detent turned the sweep off. Since it is difficult to obtain a suitable centre tap potentiometer at a reasonable price, the PCLONE2 uses a separate SWEEP DIR switch to control the sweep direction and the potentiometer just controls the sweep range - the end result is the same and this configuration actually gives a little more flexibility than the single control of the original
•MOD RATE and MOD DEPTH - The PCLONE2 has a Low Frequency Oscillator (LFO) which modulates the pitch. The wave form is selectable as a Triangle or a Square wave via the MOD WAVE switch. The LFO is key to getting some of the wackier bleepy-bloopy dub siren noises this thing can make - at the top end of the LFO rate, some FM or PWM-like sounds are possible.
•The CLICK switch enables the "attack sound" circuit that makes a click each time the sound is triggered. The PCK100 manual described this as the "realistic sound of a stick striking a skin". I am not so sure I quite agree with that but being able to switch this circuit in and out does open up a bit more sound variation (The original did not have this switch). The effect is often quite subtle.
•The VCO WAVE switch allows the voice oscillator to be switched between a mellow triangle wave and a harsher square wave (The original did not have this switch, although it was a common mod to add it)
NOTE: This kit is a recreation of the PC-2/PCK100 based on the original schematics. I needed to make a couple of modifications on account of the rarity of the Roland BA662 op-amp which was used in the original. This version uses the BA6110 op-amp with a current buffer circuit to more closely match the characteristics of the BA662
MODS:
Pitch CV, Decay CV and VCO waveform mix CV
Prototype 2017 RhythmDial
1 Users are observing this
