[sdiy] Thoughts on drum synth

[matti]

On Sun, 31 Mar 2002, Tim Ressel wrote:

> Hi Y'all,
>
> Thought I would toss in my thoughts on the subject of
> drum synthesis. According to Olsen's "Music, Physics
> and Engineering", a drum has a six modes of
> oscillation which have a non-harmonic relationship.
> Here are the freqs:
>
> 1st mode      Fo
> 2nd mode      1.59Fo
> 3rd mode      2.14Fo
> 4th mode      2.3Fo
> 5th mode      2.92Fo
> 6th mode      3.6Fo
>
*snip*

Some things.

Does thebook mention eg a 6th mode excitation produces always 1st-5th
modes as well? Does it give any laws giving mode-amplitude ratios?

Dunno about bothering with NCOs. Analog biased - it seems twin-t
oscillators and simple transistor-diode-cap-pot EGs would work fine. This
is where the buchla in each of us gets to play. I don't think there could
be anything more boring than a row of six SPST momentary contact switches.


enjoy







-
I finally got to the toilet paper, but couldn't find the end of the roll.
I grabbed at the paper, clawing at it, but it felt like smoke. I
eventually managed to grab a fistful, and looking down at my hand, I
couldn't see anything, but I knew I had the paper. Somehow. I managed to
wipe, somehow, and while glancing down I noticed my legs had disappeared.
Oh, no, it's ok, there they are. No, they've gone again. How the fuck am I
supposed to wipe when my asshole keeps disappearing?