convolution tool and reverbs

[Martin Czech]

:::This is truely great stuff. What I'd like to see is a tool to make
:::artificial room responses, by calculation. Imagine you'd describe the room
:::mathematically and calulate a response from that. That would give us the
:::possibility to use physically impossible responses, like walls that
:::amplify, or totally absorb energy. Cybersoundspace!

I thougth about that, too.
I don't have much information about the physics involved,
but one could try a raytracing approach (sinple minded).
One defines the six walls of a cube (reflection properties,
ie. filter, assuming that this does not depend on ray angle).
Then the virtual source emitts serveral rays in all or prefered
directions, ie. a pulse wave. These rays travel and get reflected
like optical rays, acording to the dispersion filter.
The virtual microphone collects all throughcomming rays
inside a certain volume.

This is totally simple minded and does not imply that 
traveling waves should be computed.

And it looks like a awfull lot of work, the debugging
must be horrible without special tools.

I better stick to baloons.

My experiments with noise pulses, or decaying noise showed,
that even such a total unphysical approach yields nice
results. Eg. with cool edit one can draw single reflections
or echoes at will.

I guess it would be better to have a reflection generator
that creates an impulse response according to some formula,
or table.

m.c.