Change Slower element maximum value?

[Kewl]

In SB1, what is the "Change Slower" element maximum value?

[makira]

There is, in theory, no maximum. In practice, you'll hit the limit due to the precision of the floating point number representations.

[Kewl]

OK, thanks.

If I wanted to construct from scratch a "change slower" circuit, what would be needed?

[dtpietrzak]

I think it can be done with an envelope detector. Just set the attack and release to the same values. http://musicdsp.org/archive.php?classid=2#97 This is an algorithm for an envelope detector. There's a few of 'em here.

[makira]

The algorithm is simple:
sr is sample rate, t is speed in milliseconds, i is input sample, o is output sample, c is a derived coefficient, and s is a state value.

Initialisation:
s = 0
c = 0.01**(1000 / (t * sr)) (where ** is the power operator)

Application:
s = c*s + (1-c)*i
o = s

You can also look at the smoother circuit in SBv2 which does the same thing, except it initiatize s to the first sample it sees.

[Kewl]

OK, thanks. It works, but it's too slow. The feedback element maybe?

Capture d’écran 2015-08-02 à 14.56.54.png

[makira]

Can't implement it manually in SBv1, since the feedback element delays the signal a full block instead of a single sample.

[Kewl]

Ah, OK... Thanks.