|Q172 Quantizer Aid|
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The Q172 Quantizer Aid operates in conjunction with the Q171 Quantizer Bank providing a fourth quantizer channel along with many unique features.
Note: The Q172 requires the Q171 to operate.
Features include rotary switch selection of the note group and the addition of new groups including quarter-tone, and 3 user-programmable groups.
A MIDI output jack produces digital notes matching the quantized output. This effectively turns our analog sequencers (Q119 and Q960) into MIDI sequencers and offers many interesting connectivity possibilities with digital equipment.
A Bypass switch provides real-time selection of a quantized or unquantized output.
A 3-position Transpose switch lets the operator add or subtract an octave to the quantized output in real-time. The transpose input jack provides voltage controlled transposition to the Pitch voltage output.
The MIDI input jack provides a simple method of programming the 3 user-programmable note groups. Simply plug in a keyboard controller and press the keys you'd like in your custom group. Groups are saved through power cycles.
The Gate input can be used to control the timing of quantization and allows operation as a digital Sample and Hold. The Gate output provides a pulse at each quantization output change to trigger external events such as envelope generators and sequencers.
Controls and Connectors
This does not have to be a pitch voltage, it can be any signal within the valid range.
Voltage range is 0-10 volts (10 octaves).
Voltages below 0 will be quantized as 0
and voltages above 10 will be quantized as 10.
To quantize bipolar signals such as -5v/+5v waveforms from an oscillator, use a Q125 Signal Processor to shift (add +5v offset) the signal to produce 0-10v.
The output voltage produced will be the closest match to a note within the selected note group. The output is low impedance capable of driving 6+ oscillators with minimal droop.
Usage and Patch Tips
To program a custom group, set the Note Group selection switch to the desired programmable group - 1, 2 or 3. Then patch the MIDI output of a MIDI controller (typically a keyboard) to the MIDI input on the Q172 panel. The MIDI controller must be set to MIDI channel 1.
Choose an octave (C thru B) on the MIDI controller to be used for programming. Begin pressing the desired notes. Pressing a note repeatedly will toggle the note On/Off - ie: add/remove it from the group. Pressing a key outside of the octave will cause all notes in the group to be cleared.
Each programmed key also includes pitch-bend data. Use the pitch-bend wheel on a controller then press a key to program the note. When a note is added to a group with pitch-bend, it must also have the exact same pitch-bend to removing it. This can be made easier by programming the Q172 using MIDI software running on a personal computer.
Programmable note groups are saved automatically to internal non-volatile memory if the quantizer does not receive a new MIDI note for 10 seconds.
Itís easier to program a group when you can hear what is happening. Patch the Pitch Out and Gate Out of the quantizer to a normal synthesizer patch (VCO,EG,VCA) so you can hear the output. Patch a Ramp waveform from a Q106 Oscillator through a Q125 Signal Processor, then to the Pitch In of the Quantizer.
Adjust the speed of the oscillator to about 5hz so you can hear the notes. Adjust the Offset and Gain of the Q125 to get a range of voltages that lets you hear all the notes in one or more octaves. Now you can hear the notes as you add and remove them from the programmable group.
Changing MIDI Output Channel #
Details about the Q172's connection to the Q171
End of Product Information