[sdiy] quantizer questions..(Ray Wilson model just built)

[Ray Wilson]

Samples are now on the web page for the Quantizer (YouTube is on the way).

Cheers

----- Original Message ----- 
From: "Ray Wilson" <raywilson at comcast.net>
To: "Dan Snazelle" <subjectivity at hotmail.com>; "Paul Perry" 
<pfperry at melbpc.org.au>; <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, September 21, 2008 8:12 AM
Subject: Re: [sdiy] quantizer questions..(Ray Wilson model just built)


> The Voltage Quantizer's initial voltage pot is similar to what Paul 
> suggested. If you just connect the quantizer's output to a VCO for example 
> and adjust the initial voltage pot from low to high you will hear the 
> effect of the quantization on the voltage coming from the pot (which is 
> wired as a variable voltage divider). So in 1/2 step mode you will hear 
> the oscillator rise in pitch in discrete 1/2 step intervals. When I refer 
> to half step I mean C, C#, D, D#, E, F, F#... etc. Whole steps would be: 
> C, D, E, F#, G#, A#, C... etc. Fourths mode would be: C, E, G#, C... etc. 
> The switches for 1/2 step, whole step, and fourths act immediately because 
> they change the configuration of the output D to A. The quantizer is meant 
> to follow voltages changes in the range of very low frequency to about 400 
> HZ. For example a sequencer running a sequence is typically about 2 or 
> three notes a second. A S&H is similar but sometimes up to 10 to 20 notes 
> a second. Once you start putting audible frequencies into the input the 
> output starts to become more wave like (still consisting of discrete 
> samples of the input but more cyclic in nature). So ideally if you want 
> the effect of random notes from the 12 tone scale (or whole or fourth note 
> scales) you want your S&H or sequencer to be changing at a rate that is 
> sub audible (20 HZ or less). You also need to make sure the input voltage 
> is in the range of 0 to +7 volts. Negative voltages will not be quantized 
> and the unit will simply output it's lowest voltage. (.08333 in 1/2 step 
> mode, 0 in other modes).
>
> You won't hurt the unit by applying out of range synth level voltages. 
> (e.g. -10V to +10V). The unit quantizes voltages in the range of 0 to 
> about 7 volts. It will not quantize negative voltages. So be sure to apply 
> offset to the signal being fed in to bring it into the 0 to +7V range.
>
> Cheers and good quantizing.
>
> Ray
>
>
>
> ----- Original Message ----- 
> From: "Dan Snazelle" <subjectivity at hotmail.com>
> To: "Paul Perry" <pfperry at melbpc.org.au>; <synth-diy at dropmix.xs4all.nl>
> Sent: Sunday, September 21, 2008 5:08 AM
> Subject: RE: [sdiy] quantizer questions..(Ray Wilson model just built)
>
>
>>
>> by complexity, what i meant was this. into a 1/voct input i would put 
>> something in that i was sure would trigger it. (a signal with peaks and 
>> valleys) and it would just put out one or two notes. annoying as hell.
>>
>> then as i said i tried the linear input..wow
>>
>>
>> i assume its made to work with linear inputs...i didnt do anything wrong 
>> now did I?
>>
>> thanks for the help.
>>
>>
>>
>> --------------------------------------------
>> check out various dan music at:
>>
>> http://www.myspace.com/lossnyc
>>
>>
>> http://www.soundclick.com/lossnyc.htm
>>
>>
>> http://www.indie911.com/dan-snazelle
>> (or for techno) http://www.myspace.com/snazelle
>>
>>
>>> From: pfperry at melbpc.org.au
>>> To: synth-diy at dropmix.xs4all.nl
>>> Subject: RE: [sdiy] quantizer questions..(Ray Wilson model just built)
>>> Date: Sun, 21 Sep 2008 17:16:44 +1000
>>>
>>> More simply, the input signal may not be covering the entire range.
>>>
>>> As for complexity..
>>> The output from a quantizer is going to be LESS complex thatn the input,
>>> because while the input signal can have any voltage over a range, the
>>> quantizer has only a limited number of defined voltages outout - that is
>>> what a quantizer is!
>>>
>>> The point to doing quantizing, is to turn a continuous varying signal 
>>> into a
>>> series of notes. It seems as though it is doing that, allright.
>>>
>>> I'd make a "test voltage" from a 9v battery and a pot, so I could dial 
>>> from
>>> 0 to +9V, you should get the full range of notes from 0 to 6V, then just 
>>> the
>>> highest.
>>>
>>> Mind you, I haven't built one yet..
>>>
>>> paul perry melbourne Australia
>>>
>>>
>>>
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at dropmix.xs4all.nl
>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
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