5 Feb
2005
5 Feb
'05
8:46 a.m.
On Saturday 05 February 2005 11.37, Jens M Andreasen wrote:
[...morphing between impulse responses etc...]
Why would you need to separate them? AFAIK, you only do that with
feedback networks and similar designs. The early reflections are just
a part of the impulse response.
Use a 'wobble-generator' to crossfade between
two (or more) samples
taken at different locations.
Cheat and 'Wobble' the input and 'wiggle' the tail slightly.
Another thought: It might be interesting to apply that idea to a set
feedback network delays or similar, with similar but different
tuning...
I *do* have an
idea about what kind of problems that would pull
in, though: It would be like looping a sampled waveform, except
each sample is an impulse response... So, you need a nice, click
free, non repetitive sounding loop. :-)
Good thinking!
Click free loop can be automated.
Quantifying 'nice' is harder ...
Non repetitive ... Say we morph between two 'nice' loops:
Loop A is 2.00 seconds
Loop B is 2.71 seconds
Crossfade 3.14 seconds (full circle)
... then we would get in the right ballpark for a simulation of the
sameness, though everchanging sound of complex sustained notes.
This is for the sustained part though, and might not translate
verbatim to the decay of a room? [...]
Yeah, that's probably more accurate.
This is a well known way to "cheat" to
save cycles.
Or perhaps it is:
A simplified model of a rooms characteristic decay combined with a
simplified model of the turbolence, sounds better than without the
simplified turbolence. In a parallel universe it could argued that, a
speech-synthesizer
singing 'Lieder' is much more convincing if you have the appropiate
Bontempi Piano to go along with it.
*hehe*
//David Olofson - Programmer, Composer, Open Source Advocate
.- Audiality -----------------------------------------------.
| Free/Open Source audio engine for games and multimedia. |
| MIDI, modular synthesis, real time effects, scripting,... |
`-----------------------------------> http://audiality.org -'
--- http://olofson.net --- http://www.reologica.se ---