[music-dsp] Beginner's compressor, take 2

[Richard Dobson]

This points strongly to the presence of the "denormal" problem (numbers 
too small for the floating-point  representation), which is native to P4 
CPUs, but not (IIRC) to P3s or Athlons. As a quick check, try adding 
very low-level noise (e.g. amp = 1.0e-20) to the input signal. There is 
detailed information about this in the musicdsp source archive.

Richard Dobson

David Ross wrote:

> Hi Citizen,
> 
> 
> I think there is a compatibility issue somewhere. I just tested an old 
> plugin of mine I coded on my PIII. It used to work fine but now if I 
> load it up on my P4 it is a lot more cpu intensive. Perhaps it has 
> something to do with what platform the plug is compiled on??? who knows?
> 
> Cheers again,
> 
> David
> 
> 
>> re: CPU usage and P4. using the Task Manager as a reference, i am 
>> getting ~ 10-12 % CPU usage on my Athlon XP 1800 system and Wavelab. 
>> perhaps there is an incompatibility with P4 systems? i also get no 
>> sound out whenever i instantiate it in the Samplitude 7.2 demo, but 
>> that could be something else.
>>