[LAU] Wah update

[hermann]

Am Montag, den 17.08.2009, 00:00 -0700 schrieb Ken Restivo:
> On Mon, Aug 17, 2009 at 09:46:06AM +0300, Nedko Arnaudov wrote:
> > Ken Restivo <ken at restivo.org> writes:
> > 
> > > Also, strangely, it uses no CPU, until I play something through it,
> > > then it demands a lot of CPU and doesn't stop even if I stop putting
> > > sound through it.
> > 
> > This sounds like denormalize problem. What CPU are you on? Does it help
> > if you supply constant low level noise to the input? By using the
> > noise from soundcard input for example.
> > 
> 
> Interesting. The CPU is this:
> http://restivo.org/projects/eee/cpu.txt
> 
> Once it starts using up CPU, putting sound through doesn't seem to make a difference. It's like it hits a wall as soon as some sound goes in, and doesn't ever back off again.
> 
> -ken
ups, have only check it with guitar, there you have always a small noise
input.
Build it with the -mfpmath=sse flag enable. That would help. Or add a
denormal protection to it .

@211

                   for (int i=0; i<count; i++) {
				float 	S0[2];
				float fTemp0 = input0[i];
                   -            S0[0] = fTemp0;
                   +            S0[0] = fTemp0 + 1e-20;