[sdiy] Sound synthesis with microcontrollers

[Jaroslaw Ziembicki]

> Discrete resistors? I wonder how much true resolution this really
> gives to you. Have you tried if it sounds different with only the
> upper 8 bits connected?
>
> Ingo


Hi, Ingo!
I bought two 100 pcs. packages of 75k and 150k 1% metal resistors.
Then I selected resistor pairs for close matching for the most significant 4
bits.
What counts in this case is the resolution (16 bit), not the accuracy
(approx. 0.05%)
I got. Of course, I could use a sigma-delta codec chip (eg. Crystal). I
would
certainly do that if it was a professional project. But as hobbyist, I
prefer very simple
solutions!
In this case, I acted very spontaneous. I drove to an electronic store on
one Saturday
morning and bought all the parts. The synth board was ready on Sunday. After
two
weeks, the sound synthesis already worked (including LFO and ADSR). I had
really
much fun...

Regards
Jarek