I did not mean to overwhelm you guys with all that information.
The important question in all that was:

How does one denote the order an impulse will travel though the mass 
network?

The manual is not clear on this, can someone give me some feedback.




Anthony



----- Original Message ----- 
From: 
To: 
Sent: Thursday, June 26, 2008 4:30 PM
Subject: [Csnd] Scanned Synthesis Matrix question...


I have been doing some experimenting with scan and have some questions for
you scan users out there. Here is a blurb from the csound manual on scanned
synthesis...

"Scanned synthesis is a variant of physical modeling, where a network of 
masses connected by springs is used to generate a dynamic waveform. The 
opcode scanu defines the mass/spring network and sets it in motion. The 
opcode scans follows a predefined path (trajectory) around the network and 
outputs the detected waveform. Several scans instances may follow different 
paths around the same network.

The Csound implementation adds support for a scanning path or matrix. 
Essentially, this offers the possibility of reconnecting the masses in 
different orders, causing the signal to propagate quite differently. They do 
not necessarily need to be connected to their direct neighbors. Essentially, 
the matrix has the effect of “molding” this surface into a radically 
different shape."

Most of the matrix files I have seen, use 1 or 0 to represent if a mass is 
active or not.
How does one denote the order an impulse will travel though the mass 
network?

Also, I have been experimenting with different matrix designs. Sometimes I 
get interesting
results sometimes not. Has anyone gleaned any useful insight on how to 
design a
good matrix? Does it help to approach their design from a physical 
perspective?
For example I was thinking it would be interesting to apply Chladni plate 
mathematics
to scanned synthesis. Check it out...
http://local.wasp.uwa.edu.au/~pbourke/surfaces_curves/chladni/

Ernest Florens Friedrich Chladni (1756 - 1827) performed many experiments to 
study
the nodes of vibration of circular and square plates, generally fixed in the 
center and
driven with a violin bow. The modes of vibration were identified by 
scattering salt or
sand on the plate, these small particles end up in the places of zero 
vibration.

If the scan mass network matched these vibrational patterns would I get the
original sound?


Send bugs reports to this list.
To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe 
csound"