[sdiy] pitch quantizing

[Mountain Man]

Thanks Mitchell, Edu, Rene, Ian for tips (hope I mentioned everyone!)   The window
comparator idea is an interesting one.  I have two reservations.  First, ability to
get acurate turning.  As someone mentioned, one trimpot per tone with tuning of each
is a possibility, but a real pain.  The other problem is the amount of circuitry to
cover a whole range of tones.  Just three octaves (which seems a minimum) would
require 9 quad comparator chips, with supporting circuitry.  I'm thinking that the
clocked stairstep approach might be a better bet.

Elby


Mitchell Hudson wrote:

>     I am a real begininer at all of this stuff but I had the idea a while back
> to make an analog quantiser from a bunch of comparators. The voltage steps would
> not be very accurate. The basic circuit was taken from the Forest Mims book and
> supposed to be an LED bar graph.
>
> http://www.webdevils.com/schematics/quantiser_01.jpg
>
>     I showed this to the list and a lot of people suggested using an LM3914,
> LM3915 or LM3916 Dot/Bar Display Driver. Find the data sheet for this one, I can
> email it you if you like.
>
> --M