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Re: [sc-dev] UnaryOpUGen with dbamp and ampdb broken for audio-rate?
The definitions are here:
inline float32 sc_ampdb(float32 amp)
{
return std::log10(amp) * (float32)20.;
}
inline float32 sc_dbamp(float32 db)
{
return std::pow((float32)10., db * (float32).05);
}
On 19.12.2014, at 14:59, Julian Rohrhuber <julian.rohrhuber@xxxxxxxxxxxxxxxxxx> wrote:
> Here is a general test:
>
> (
> f = { |operator ... args|
> {
> var cases;
> cases = args.collect { |x|
> [
> x,
> DC.kr(x),
> DC.ar(x),
> Duty.ar(1, 0, Dseq([x])),
> ]
> };
> cases.flop.collect { |x|
> var a, b;
> #a, b = x;
> K2A.ar(a.perform(operator, b))
> }
> }.loadToFloatArray(0.01, s, { |x| x.clump(4).at(100).postln })
> };
> )
> f.value(\ampdb, 0)
> f.value('+', 5, 4)
>
>
> On 19.12.2014, at 13:31, Hanns Holger Rutz <contact@xxxxxxxx> wrote:
>
>> Signed PGP part
>> So for inputs between -765 and -770, dbamp outputs -nan instead of zero!
>>
>> play {
>> DC.ar(-764).dbamp.poll(0, "A"); // 0
>> DC.ar(-765).dbamp.poll(0, "B"); // -nan
>> DC.ar(-770).dbamp.poll(0, "C"); // -nan
>> DC.ar(-771).dbamp.poll(0, "D"); // 0
>> 0.0
>> }
>>
>>
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