THIS IS THE PAGE FOR REV 1 QUANTIZER BORDS
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Quantizer

My goal was to create an updated version of the Serge Quantizer, which I always lusted after but never had.

The channels are independent but quantized all to the same selected scale.

VC or manual selectable scales (32 scales in 2 banks of 16)

VC or manual bank selection VC Hold or Sample and Hold function (switch selectable)

 

 

Quantizers take continuously varying voltages and translate them into steps, normally 1/12 volt which can then be used by VCOs to play "in tune"

This quantizer is capable of 24 notes/octave, allowing for quartertone scales. There are 8 channels of quantizing.

Each channel is independent, but shares the scale and hold/S&H settings.

Scales are arranged in 2 banks of 16 each.

Both bank selection and scale selection are voltage controllable.

Hold/S&H has 2 modes which are switch selected. In hold mode VC will cause the quantizer to hold its outputs regardless of what is at its inputs. In S&H mode a rising edge will cause the Quantizer to sample its inputs, which will then be held until the next rising edge.

The Quantizer is an advanced build. Parts count is high, it requires accurate calibration and a great deal of point to point wiring.

The Larger board contains the analog circuits including the Input/Output multiplexing and the CV conditioning circuits. The smaller board is the digital board containing the PIC chip and the D/A converter.

Documentation includes a BOM, resistor changes for 15V operation and for Buchla 1.2v/oct.

 

Maximum response times

Channel Response Time: 300us (or aprox 3k/second)

Channel to Channel Response: 40us

Scale Select Response Time: 31ms (aprox 32 times/sec)

Input Range: +/- 12v (negative voltages ignored)
Output Range: 0 to 10v

Channel 8 Bias Range: +/- 4.5 volts

Calibration Mode: Shorting the calibration header puts the Quantizer in calibration mode. The outputs no longer follow the inputs.

Outputs: Channel 1-6 = 0v to 5v, Channel 7= 7v and Channel 8= 10v.

The mode is used to adjust internal trimmers.

VERSION 1 Quantizer Build Notes

QuantLCDWEB

Analog board

Digital Board

QUANTFront
Scales:
Scales:
OUTPUTS