Simulation of rain sound

tux · July 26, 2023, 2:21am

Hello,
has anyone written some good Csound code to realistically simulate the sound of rain?
So far the simulations (not with Csound) that I’ve listened to are always too similar to simple white noise, not very realistic.
Thank you,
t.

dylan · July 26, 2023, 10:58am

Hi,

I don’t have any Csound code (new to Csound) but maybe these pure data patches will give you a starting point?

I own the book and the author gets into the details about the shape of a droplet and how it impacts different surfaces.

Right now I have no idea how a pure data patch would translate to Csound, but my sense is that it would be a few instruments, reading and writing from global busses.

Hearing the pure data patches might provide some ideas about how to approximate the sound without attempting to mirror the patches.

rory · July 26, 2023, 5:26pm

Iain McCurdy shared a simple weather instrument on the Cabbage forum some time back:

And his Shower instrument could also be put to use as a rain maker.

github.com

rorywalsh/cabbage/blob/develop/Examples/FunAndGames/Shower.csd


/* Attribution-NonCommercial-ShareAlike 4.0 International
Attribution - You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
NonCommercial - You may not use the material for commercial purposes.
ShareAlike - If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode */

; Shower
; Iain McCurdy, 2021

; Physical model of a shower including a squeaking tap

; TAP      - adjusts the intensity of the stream of water (density of drips)
; Duration - duration of the individual drips
; Pitch    - even though the pitches of the drips are slightly random, this controls the average pitch
; Spread   - random range of the pitches of drips

<Cabbage>
#define RSliderStyle  trackerInsideRadius(.9), trackerOutsideRadius(1), markerColour(100,100,255), markerThickness(2), trackerColour(130,130,255), trackerThickness(4), colour(60,65,80), fontColour(200,200,200), textColour(200,200,200), outlineColour(50,50,50), valuetextBox(1)
#define RSliderStyle2  trackerInsideRadius(.9), trackerOutsideRadius(1), markerColour(100,100,255), markerThickness(2), trackerColour(130,130,255), trackerThickness(4), colour(60,65,80), fontColour(200,200,200), textColour(200,200,200), outlineColour(50,50,50), valuetextBox(0)

This file has been truncated. show original

tux · July 26, 2023, 5:58pm

Very interesting, thank you.
t.

boonier · July 27, 2023, 9:50am

Hi I think I had a go at rain stuff a while back and came up with this

gkdens1 init 3.2
gkdens2 init 2.0

instr RainyNess
	amixal = noise:a(1, 0) * (pinker:a() * gkdens1)
	amixbl = amixal * (pinker:a() * gkdens2)
	afinl clip amixbl, 0, 1
	
	amixar = noise:a(1, 0) * (pinker:a() * gkdens1)
	amixbr = amixar * (pinker:a() * gkdens2)
	afinr clip amixbr, 0, 1

	afinl *= 0.5
	afinr *= 0.5
	
	out afinl, afinr
endin
schedule("RainyNess", 0, -1)

Could be improved no doubt about that!