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Synthesizers.com - The new Q171 Quantizer Bank
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elektro80
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Joined: Mar 25, 2003
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PostPosted: Sat Nov 21, 2009 6:17 pm    Post subject: Synthesizers.com - The new Q171 Quantizer Bank
Subject description: Seems like a very good thing!
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http://www.synthesizers.com/q171.html


The Q171 Quantizer accepts a varying input voltage and produces a
voltage that is locked into a pre-selected scale.

The main purpose of a quantizer is to simplify tuning of an analog
sequencer, but there are many other musical applications. Any voltage
source can be processed by the quantizer including envelope generators,
oscillators, noise sources, etc. The Q171 can also be synchronized with
external events and operated as a programmable Sample & Hold using the Gate Inputs.

Three independent channels are provided. Each channel uses a 12-note
per-octave semitone scale unless an alternative scale is selected using the
option switches. Possible scales include Major, Minor, Augmented,
Diminished versions of 7-note scales, Triad chords, and Root+5th.


BTW, I´ve ordered one. Very Happy

And.. gee.. did this post ended up looking rather confused.. ? The "Right" attribute for images isn´t really that cute. I could possible throw in a gallery of black and white photos of Fidel Castro in order to lighten up this post? Right.. ok.. lemme think about that for a while.

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seraph
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PostPosted: Sun Nov 22, 2009 1:00 am    Post subject: Re: Synthesizers.com - The new Q171 Quantizer Bank
Subject description: Seems like a very good thing!
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elektro80 wrote:
I could possible throw in a gallery of black and white photos of Fidel Castro in order to lighten up this post? Right.. ok.. lemme think about that for a while.


What the world needs now is a "Castro Quantizer" Exclamation Right Question

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elektro80
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PostPosted: Sun Nov 22, 2009 6:24 am    Post subject: Re: Synthesizers.com - The new Q171 Quantizer Bank
Subject description: Seems like a very good thing!
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seraph wrote:
elektro80 wrote:
I could possible throw in a gallery of black and white photos of Fidel Castro in order to lighten up this post? Right.. ok.. lemme think about that for a while.


What the world needs now is a "Castro Quantizer" Exclamation Right Question


Well, wouldn´t that be way too late? They needed one back in the 60s.
BTW, I wonder how they would have wanted to scale and tweak a Castro. Perhaps like:

Input
( whatever left wing yadayada )


Output
-a slutty Winnie The Pooh with an
Ayn Rand wig

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DrJustice



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PostPosted: Sun Nov 22, 2009 7:23 am    Post subject: Re: Synthesizers.com - The new Q171 Quantizer Bank
Subject description: Seems like a very good thing!
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elektro80 wrote:
like:
Input
( whatever left wing yadayada )

Output
-a slutty Winnie The Pooh with an
Ayn Rand wig

That module may cause global instability, i.e. more synthesis than you might want Shocked

But back to the Q171, do they pull it off with all analogue circuitry or is there a microcontroller in there?

DJ
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DrJustice



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PostPosted: Sun Nov 22, 2009 7:34 am    Post subject: Reply with quote  Mark this post and the followings unread

^ I just checked on the synthesizers.som site and they do specify the method used:
"Quantization Method: Processor controlled using ADC/DAC"
Which is good, or it would most probably not have seen the light of day, nor would it had the triple sections and cool features...

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elektro80
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PostPosted: Sun Nov 22, 2009 7:58 am    Post subject: Reply with quote  Mark this post and the followings unread

Roger Arrick has pretty much promised another module soon that supposedly complements and extends the features of the Q171.
He kinda tends to do that, like with the Q141 Oscillator aid module for the Q106 Oscillator and the Q140 Fixed Filter Bank Aid for the Q127 Fixed Filter Bank.

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elektro80
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PostPosted: Sun Nov 22, 2009 8:17 am    Post subject: Reply with quote  Mark this post and the followings unread

I´m suggesting/guessing/wishing that such an Aid module for the Q171 would include something that would allow for quantized transposed scaling of say two of the channels of Q171. Imagine using that with a couple of Klee sequencers, a CV keyboard or what have you..
BTW.. a scaler that allows for easy setup of say a suboctave output would be nice as well. This is not difficult to patch out yourself, but the Q171 begs for something like this for its Aid Module. Very Happy
Another idea.. a switch that forces the quantized output to stay inside say a range of one octave ( which could be set by external CV control ) no matter if the pattern really spans say three octaves or whatever. The switch could also be stepped on/off by a gate signal?

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elektro80
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PostPosted: Thu Dec 03, 2009 7:15 pm    Post subject: Reply with quote  Mark this post and the followings unread



This new module really adds a significant number of enhancements to the Q171.

More info:

The Q172 Quantizer Aid operates in conjunction with the Q171 Quantizer Bank providing a forth quantizer channel along with many unique features.

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 effectivly 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 in any amount.

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.

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

Note Group Selection Switch
Determines the group of notes produced at the quantized output. Three of the groups are user-programmable.
MIDI Input

This jack allows programming of the 3 user-programmable note groups. Simply connect a keyboard controller set to channel 1, select the note group (Prog 1, Prog 2, Prog 3), then enter the notes desired. Quantization is performed in real-time as the notes are added to the group. The group is cleared when a note outside the octave is received. This offers many possibilities for real-time performances.
MIDI Output

This jack provides a source of MIDI notes that follow the quantized output. This allows any analog voltage source such as sequencers and oscillators to produce MIDI notes in real time. All notes are sent on channel 1.
Bypass Switch

Real-time switching of the pitch output between the original input signal and the quantized version.
Transpose Switch

Provides real-time transposition of the quantized output - plus 1 octave and minus 1 octave.
Pitch Input

Pitch voltage to be quantized.
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 the signal processor to shift (add +5v offset) the signal to 0-10v.
Pitch Output

Quantized pitch output.
The output voltage will be the closest match to a note within the selected note group. Low impedance capable of driving 6 oscillators with minimal droop.
Gate Input

Allows control of quantizing timing. When no plug is inserted, quantizing occurs continually with timing determined by the internal processor. When a plug is inserted, quantizing occurs on the rising edge of the signal (typically 0 - 5 volts). This allows the quantizer to operate as a Sample & Hold.
Gate Output

Short 5ms pulse (0 - 5 volts) is produced when quantization occurs and a new signal is present at the pitch output. A 2ms off-time is guaranteed.


Specifications
Panel Size: Single width 2.125"w x 8.75"h.
Quantization Method: Processor controlled using ADC/DAC.
ADC Inputs: 10-bit and precision buffer/scaler.
DAC outputs: 12-bit and precision buffer/scaler.
Power: none in addition to the Q171

http://www.synthesizers.com/q172.html

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