Thanks a lot for the responses!
I tried my test.orc on Anthony's double-precision Csound 4.23: No 
noise!!! the sound fades smooth and clear. After that, I rendered with 
single precision...the noise was there again.

Ma++'s Version: Noise using butterhp, 32 bit perf  (sr 48 khz)
4.23f12(Antony's Version): Noise using butterhp if used with 32 bit 
perf (sr 44,1 khz)
4.23f12(Antony's Version): Clear sound using butterhp if used with 64 
bit perf (sr 44,1 khz)

On Win-Versions of Csound there has always been reported clear sound, 
so far.

Are there any ideas what the origin of the noise could be?


All the best
Jan Jacob



sound         |         movement          |          object         |   
        space
sonic architecture       |        site: http://www.sonicarchitecture.de
spatial electronic composition     |    2nd order ambisonic music 
  

I'm glad that the Mills Perf64 worked for you!

Different CPUs can give different results for floating-point operations.
Perhaps this is a difference between PowerPC and Pentium architectures.
Although, it may still be a bug in the butterhp code that only shows up on
PPC for some reason.

*shrug*

Anthony

Jan Jacob Hofmann wrote on 10/17/05 2:02 PM:

> Thanks a lot for the responses!
> I tried my test.orc on Anthony's double-precision Csound 4.23: No
> noise!!! the sound fades smooth and clear.

> On Win-Versions of Csound there has always been reported clear sound,
> so far.
> 
> Are there any ideas what the origin of the noise could be?