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Subject: Re: Clock Divider ideas

From: "Paul Schreiber" <synth1@...
Date: 1999-05-26

Errr...I said that. It divides from 2, 3, 4, 5, 7, 8, 9, 10.

Paul S.

-----Original Message-----
From: Dave Bradley <daveb@...>
To: motm@onelist.com <motm@onelist.com>
Date: Wednesday, May 26, 1999 8:27 AM
Subject: Re: [motm] Clock Divider ideas


>From: "Dave Bradley" <daveb@...>
>
>As usual, I have to chime in and ask for weird stuff...
>
>How about the ability to divide by non binary values - divide by 3, 5, 7
>etc. gives you the ability to set up and/or sequence poly rhythms easily.
>
>(Ducking)
>
>Dave Bradley
>Principal Software Engineer
>Engineering Animation, Inc.
>daveb@...
>
>> -----Original Message-----
>> From: Paul Schreiber [mailto:synth1@...]
>> Sent: Tuesday, May 25, 1999 10:09 PM
>> To: motm@onelist.com
>> Subject: Re: [motm] New modules Status
>>
>>
>> From: "Paul Schreiber" <synth1@...>
>>
>>
>> >These all sound great! I'm interested in what your thinking of
>> for both the
>> >Lag and Divider modules.
>> >
>>
>>
>>
>> The clock divider is "funny-looking" as in the simple form, has no pots
>> (only jacks) and switches.
>>
>> You have an INput, that is set with a LM311 for 2.4V switchpoint (TTL
>> compatible). Then, probably
>> a little Xilinx pre-programmed 44 pin FPGA with symmetrical
>> dividers from 2
>> to 10. A switch
>> to set outputs from 0-5V or +-5V (TTL mode or waveform mode). Or I
could
>> get fancy and have
>> a symm/non-symm function. In non-symm, you get 1 pulse out only at the
>> divide rate. In symm, you get a 50%
>> duty cycle square wave at the divide rate.
>>
>> So, it's like half of a '120 with individual outs.
>>
>> The circuit is simple: a LM311, the Xilinx part (PLCC in a socket) and 2
>> quad op amps, 9 jacks, 1 switch. 1U wide.
>>
>> The lag can be simple or complex, depending on price and the skill of the
>> designer.
>>
>> >>Then 2 more filters (Moog and SEM) and THEN work on Baby MOAS
Sequencer.
>> >
>> >>I am against VC-Q in general because it severly degrades CV
feedthrough.
>> >>I
>> >>may do
>> >>Thomas Henry's 3320-based LP/All-pass filter with VC-Q. The CEM
>> chips are
>> >>trimmed
>> >>by zener-zap to minimize CV feedthrough, and I have access to 12,000 of
>> >>them!
>> >
>> >
>> >Bummer! I figgered there was a reason you'd not mentioned VCQ in
>> the past.
>> >VCQ is really powerful though so I'd like to see you look into the 3320
>> idea
>> >-- I've been using some 3320s with their VCQ to great success.
>>
>>
>>
>> I may have VC-Q on the Moog filter if it doesn't muddy up the sound too
>> much.
>>
>> >
>> >And after all those modules....maybe... the fabulous MOTM Ribbon
>> >controller????
>>
>>
>>
>> Errr......don't hold your breath.
>>
>> Paul S.
>>
>>
>>
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