Subject: [linux-audio-dev] Granular synthesis
From: Juhana Sadeharju (kouhia_AT_nic.funet.fi)
Date: la maalis 11 2000 - 20:08:10 EST
Hello. Following occured in Audiotechque mailing list archives:
Jarno (jams_AT_cs.tut.fi):
The granular mode idea sprung from a book (The Computer Music Tutorial
by Curtis Roads) where there was a chapter about granular synthesis. In the
book there was this granular idea for reverberation: you would synthesize a
cloud of grains (Gaussian PDF bell curves) in which the grains have random
location, 'pitch' and amplitude. This cloud would then be used as an impulse
response and convolved with a signal to produce reverb. The author called
this 'cloud reverb' and the gaussian grains' analogy are water drops.
-*-
So, anyone could dare to look at what more is written in the book
about this granular reverberation? What are the frequency properties
of one "bell curve" -- I guess its frequency range is narrow, right?
The application which I'm writing is such that user sketches energy decay
relief of the reverberation. (The relief can also be measured from a true
acoustic space.) Then the reverberation impulse response is generated
with noise function a la Moorer and shaped according to relief.
The EDR is a 2D mesh in 3D space. Some editing program is needed.
Are there any GNU editing software which could be used for this purpose?
Juhana
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