Titan/knob parameter jumping.

[Paul Schreiber]

This is how my HP1662 logic analyzer is. There is a "smoothing" profile with 8 
different possible "accelliration" profiles. Quite fun.

It's great that the creative juices are flowing!!!!

Paul Schreiber

----------
From: 	David Halliday (Volt Computer)[SMTP:a-davidh at microsoft.com]
Sent: 	Wednesday, April 23, 1997 10:42 PM
To: 	'cyborg0 at midwest.net'; synth-diy at horus.sara.nl
Subject: 	RE: Titan/knob parameter jumping.

> -----Original Message-----
> From:	Rob01 [SMTP:cyborg0 at midwest.net]
> Sent:	Wednesday, April 23, 1997 3:29 PM
> To:	Paul Schreiber; synth-diy at horus.sara.nl; 'gstopp at fibermux.com'
> Subject:	Re: Titan/knob parameter jumping.
> 
> 3) Yes, it has knobs. Just not pots! It uses Standard-Grigsby optical
> shaft
> encoders, PIC micros, and
> XICOR EEPOTS. Dig it!!
> 
> This sounds really great so far, but, if you could do ANYTHING for the
> synth world, it would be to implement an algorithm that makes it so
> that
> the parameter doesnt jump when you move the knob.. THAT is probably
> one of
> the MAIN reasons i dont replace all my analog gear with virtual
> stuff... I
> REALLY HATE PARAMETER JUMP! there, i feel better now... :))
> Im trying to figger out how that would be done with available
> components
> w/o using servo encoders.. but those WOULD be really nifty if
> implemented
> :)))))
> 
> 
> 
> Ya know...  <grin>  You could even improve ( Shhhh...  Don't listen to
> that heretic! ) the operation of the analog knobs by using digital
> pots with a nicley thought out acceleration algorithm...
> 
> Parameter jump happens with analog too and usually, I move the know a
> little bit too far nad it is hard to "get that sound back again" -
> especially when dealing with resonances near oscillation.
> 
> How about a digital pot with very low sensitivity when first touched,
> where the sensitivity ramps up about two or three times in the first
> few seconds and then stays there for most operation.  If you grabbed
> the pot and spun it sharply, the sensitivity would then jump to the
> maximum setting and stay there until movement slowed down.
> 
> This would be confusing at first but I bet that it would become second
> nature after a few hours use.  
> Want to barly tweak a value - do it slowly.
> Make a minor change, turn it for a few seconds, the sensitivity will
> increase.
> Want to move something several ocatves, jerk the knob back and forth
> to boost it's sensitivity. Fine tuning would then just be a matter of
> easing off on your movements until the sensitivity dropped back down
> to it's lower level.