[music-dsp] Beginner's compressor, take 2
richarddobson at blueyonder.co.uk
Sun Dec 14 12:17:01 EST 2003
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.
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,
>> 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.
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