Hi Alexandre,
about FM and PM (probably my reply is late!), here's a simple
implementation using oscillators with sync(0):
/// m = mod osc; c = carrier osc;//
//SinOsc m => Gain g => SinOsc c => dac;//
//Step cm => g; //cm = carrier freq in Hz//
//
//
//while( true ){//
// modInd(10, 250); //arg: modInd, freq mod //
// cm.next(500);////carrier frequency
// second => now;//
//}//
//
//fun void modInd( float i, float f ){ //arg: modInd, freq mod//
// float am; //
//
// i*f => am; //(modInd = Am/Fm), then (Am = modInd*Fm)//
// m.freq(f);//
// m.gain(am);//
//}/
this is the simplest modulation, that usually is considered as FM, but
in the end is a PM.
without going into details, what's happening is:
FM (t)=sin(ω c t +Φ c + I sin (ω m t +Φ m ))
with ω c = carrier freq, ω m = mod freq, Φ = phase
Cheers,
Mario
On 04/06/17 07:34, Alexandre Torres Porres wrote:
2017-06-04 2:35 GMT-03:00 Alexandre Torres Porres <por...@gmail.com
<mailto:por...@gmail.com>>:
It's not easy to explain, but you found the magic number/formula
that makes Frequency modulation sound like Phase Modulation.
Actually, I shouldn't have said this, I don't wanna give you the idea
it comes down to this, but there are just too many details I didn't
want get into, sorry. What I can say is that you got pretty close, not
100% there yet, and that is not as simple as just doing this every
time, it gets more complicated.
Sorry again for not getting into the math and everything. What I'd
like to add is that people use phase modulation instead of trying to
replicate it via frequency modulation cause it's just more convenient
to do directly via phase modulation if you want it to behave like that.
cheers
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