When the attack time is set high on the exponential ADSR envelope, the level saturates very quickly, both not giving the wanted slow increase and also creating a long time with nothing happening before going to the decay stage. I propose something like this as a fix or a separate function
adsre_variable_attack(attT60,decT60,susLvl,relT60,gate) = envelope
with {
ugate = gate>0;
samps = ugate : +~(*(ugate)); // ramp time in samples
attSamps = int(attT60 * ma.SR);
//The function for the attack phase. Should go from 0-1 in attSamps samples. Here it is linear
attLvl = samps/attSamps;
//In the attack phase the target moves up following attLvl
target = select2(ugate, 0.0,
select2(samps<attSamps, (susLvl)*float(ugate), attLvl));
//Instead of attT60, we choose some very small number, such that there is virtually no smoothing in the attack phase
t60 = select2(ugate, relT60, select2(samps<attSamps, decT60, 0.0000001));
pole = ba.tau2pole(t60/6.91);
envelope = target : si.smooth(pole);
This gives a linear ramp up, but any function could in principle be used. I can make a pull request if you want?
When the attack time is set high on the exponential ADSR envelope, the level saturates very quickly, both not giving the wanted slow increase and also creating a long time with nothing happening before going to the decay stage. I propose something like this as a fix or a separate function
This gives a linear ramp up, but any function could in principle be used. I can make a pull request if you want?