Re: changing a sound signal while listening to it

[Matt Flax <flatmax@xxxxxxxx>]

OK - but did you try vector graphic - kernel modulation yet ?
it has a piano like keyboard mapping ...
You can also do manual frequency products very accurately ... of the
same kernel.
http://mffmvectorbass.sourceforge.net/

It takes in vector graphics (one fig file) and outputs one wav file.

Matt
p.s. It is GPL'd free, thats general public license.
p.p.s. Needs plugin to handle visio

On Tue, 2010-08-10 at 19:54 +0800, Daniel Bowling wrote:
> Thanks to all who responded. This problem is now solved!
> 
> 
> Dan
> 
> On Tue, Aug 10, 2010 at 4:53 PM, Dan Stowell
> <dan.stowell@xxxxxxxxxxxxxxx> wrote:
>         
>         In SuperCollider this code does a simple version of what you
>         describe:
>         
>         (
>         s.waitForBoot{  
>          {
>            var centre = 440;
>            var beat = Integrator.kr(KeyState.kr(124) -
>         KeyState.kr(123))
>                   * 0.01 + 10;
>            var amp = Integrator.kr(KeyState.kr(126) -
>         KeyState.kr(125))
>                   .linexp(-5000, 5000, 0.001, 1);
>            (beat*2).poll(1, "beat freq");
>            SinOsc.ar([centre+beat, centre-beat], 0, amp).sum.dup;
>          }.play
>         }
>         )
>         
>         arrow keys up/down for volume, left/right for beat freq.
>         
>         Dan
>         
>         
>         On 10/08/2010 03:32, Daniel Bowling wrote:
>                 Dear List,
>                 
>                 I am trying to create a piece of software that will
>                 allow a subject to
>                 change the beat frequency and amplitude of a signal
>                 while listening to
>                 it in real time.
>                 
>                 More specifically, the signal will consist of two pure
>                 tones (e.g. T1 +
>                 T2), and the difference between them (T2 - T1) as well
>                 as the root mean
>                 square amplitude will be under the control of the
>                 subject via the keyboard.
>                 
>                 I have tried to execute this in Matlab using a loop,
>                 the problem is that
>                 the sound stops and then starts again at the beginning
>                 of each loop
>                 iteration.
>                 
>                 Can anyone suggest a way this might be implemented on
>                 a computer? Or
>                 perhaps just a suitable programming language?
>                 
>                 Thanks,
>                 
>                 Dan Bowling
>         
>         
>         -- 
>         Dan Stowell
>         Centre for Digital Music
>         Queen Mary, University of London
>         Mile End Road, London E1 4NS
>         http://www.elec.qmul.ac.uk/digitalmusic/people/dans.htm
>         http://www.mcld.co.uk/
>         
> 
>