Chladnidrum

Drum based on Chladni's formula

 (27 Votes)
0.1 (Updated 14 years ago)
40.6kB
September 13, 2003
Reaktor 5 or lower
Instrument Other

DESCRIPTION

Drum with harmonics computed from chladni's formula - c(m+2n)^2

Started off as a modification of the snare in rhythmmaker (electronic ins vol 1.) It is a monophonic instrument but is internally poly. 1 voice per harmonic. The main thing is the way the frequency of the harmonics are calculated. Each voice has an M and an N value. N represents the concentric drum modes and M is the radial modes. The lowest frequency is 0,1 -> no radial mode, 1 concentric mode. This ens is by no means finished - just wanted to get it uploaded as I've never seen this sort of synthesis method before. Please can any brain help to make this a real quality ens i.e - help maybe with an event table for amp,Attack and decay parameters as the way ive done it wont save the params in the snap. Its a cpu eater - there was a short period at the start of each hit which was not generated correctly even with large attack times but i found there was a cpu spike there - increased soundcard latency fixed this. this has 210 voices initially but of course can be reduced. This ens can be optimised to a good extent cpu wise i think. There is only 2 audio modules in here - one osc and one envelope, the rest if for frequency calculation, amp, a and d. Needs more work though. Any comments/help is much appreciated.

COMMENTS  (11)

Please login to add a comment
Paule
11 months ago
Yes, 2 snaps on bank 2 and 35 in bank one. 209 vc & 88.2 kHz needs 11%
Paul Weber
6 years ago
Love it, especially driven with a good monome patch :-)
GG.G SakabeaT
14 years ago
phil do yourself a favor and buy a new computer.....it "only" eat 40% cpu here on my 2.5 years old pc.....i dont think the 200 voices were ecxessives.
Oliver Gla??l
15 years ago
I replaced the parabolic oscillators by bandpass filters with high resonance. It sounds better and is cheaper in calculation cost.
Micheal Quinlan
15 years ago
f ~ (m+2n)^2 haven't a clue how to use it but!
Phil Durrant
15 years ago
sorry i was a bit harsh with my comments yesterday. i have a cold so i ws not in the best of moods.
Phil Durrant
15 years ago
please people, when you upload something, please CLOSE all the structure panels BEFORE uploading. ok, i really do not see the point of combining a sample rate or 88200 with a 209 Voice yes a 209 voice instrument. you know, as uploaded there is no way this will work on a mac and i would suggest most pcs. so i closed all the panels and reduced the sample rate and voices to 12 yes 12. and yes i did get some sound. and yes you can get some interesting "FM" sounding metallic percussion sounds. but there are only 2 snaps. i am sure that hidden away in this is a useful device. but please make it a bit easier for us people who have not got a clue what chladni'e formula is but like expereimental reaktor ens.
Kevin Hopper
15 years ago
Sorry Barry doesn't work on my Mac/9.2/665/G4. The sample rate is set to a massive 88200 on loading with all the windows open, stalling my computer and a massage says' cannot process GUI'. I've tried lowering the rate and closing the window and re-saving but it doesn't work.
Kevin Hopper
15 years ago
David Coffin
15 years ago
Yet another Phys-Mod'ling synth that doesn't work on my G4/OSX...at least it doesn't crash; just can't get a peep out of it. Acoustring takes R4.0.3 out like a mosquito zapper...GRRRRR!
David Coffin
15 years ago
now