Doepfer

Thanx Tim, I should have looked more closely! Pretty obvious there is no CV but rather an ext. clock input.

Any idea how long is this sequence? Can you notice it repeat when using high frequency clocks?

Thanx dude,

tony

> To: Doepfer_a100@yahoogroups.com
> From: timothy@tstinchcombe.freeserve.co.uk
> Date: Sat, 3 May 2008 10:17:38 +0000
> Subject: [Doepfer_a100] Re: A-117 CV response question
> 
> Hi Tony,
> 
> > What is the A-117 CV response like? Is it vaguely exponential? 
> linear? 
> > 
> > Is this a Shift register based noise circuit where the CLOCK is 
> under VC?
> 
> Yes, the A-117 produces a simple shift register sequence, but no, it 
> is not under voltage control. Thus there is no 'CV response' to talk 
> of. 
> 
> With nothing plugged into the 'ext clc' socket, the register is 
> clocked by an internal oscillator, which is controlled manually by 
> the pot on the front. If you don't want to use this, then you can 
> plug an external oscillator in, so if you want voltage control, use a 
> VCO - the response then will by whatever the response of the VCO is.
> 
> For the internal oscillator, the rate pot is perhaps reverse from 
> what you'd expect: low knob settings give a fast clock (max f on mine 
> approx, 68kHz); turning clockwise to higher settings slows the clock 
> down (min f on mine, approx 90Hz). The pot is actually a log pot 
> (taper 'A'), and so the high frequency drops off rapidly from knob  
> setting 0 to about setting 2 (where it is approx 3kHz), and then much 
> more slowly down to the minimum at setting 10. (I did plot a very 
> rough graph, but it doesn't really tell you much, but I could post it 
> if you like..)
> 
> Tim
> 
> 
> ------------------------------------
> 
> Yahoo! Groups Links
> 
> 
> 

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