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Re: [sc-dev] UnaryOpUGen with dbamp and ampdb broken for audio-rate?
hmmm. but it must have something to do with the audio-rate, because it
works for control-rate. I don't think these two functions are the
culprits (why would -inf * 20 return anything but -inf). also if you use
the language primitives, there is not problem:
0.ampdb.dbamp // 0, ok
On 12/19/2014 03:01 PM, Julian Rohrhuber wrote:
> 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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