[sdiy] Verniers for Patch Recording

[Ian Fritz]

Hi Martin --

At 05:21 AM 9/30/2003, Czech Martin wrote:

>Depends on how good your eyes are.

True.  Mine are just so-so. It also depends on how large the knob is.  I 
made a linear vernier about 5 cm long (corresponding to a typical small 
synth knob) and I can easily set and read the vernier at my normal reading 
distance.  It has a much coarser scale than I've seen on the old radio 
verniers. I did it that way to make it fairly easy to construct.  You could 
copy the image I posted into a graphics program and reduce it to different 
sizes to see how it works for your eyes.

>I guess some control voltage pathes are more
>sensitive than others.

Right.  But I think If you have a complex patch you may still want to get 
all the parameters quite accurately to avoid accumulated error.

>What about a range switch together with the pot?
>This will virtually increase the resolution of the pot.
>It can be a 2 position, a 3 postion, or the usual
>12 position switches depending on application.

Well, I did mention that at the end of the post.  Myself, I wouldn't 
consider that practical for every single control, but for some controls it 
would probably be necessary.  For example if you need to reproduce an FM 
patch, the frequency ratio needs to be very accurate.  The modulation 
amplitude I'm not sure about.  That could get tricky.

   Ian