VarLag freezes input

Questions
1

Hi everyone,

I’m experiencing some problems with VarLag, which doesn’t change at all and simply freezes on what appears to be the first value of its input. For example:

(Running 3.13-rc1 on Ubuntu)

(
{
	var input = LFNoise1.kr(0.5, 50, 100).poll(label: \input);
	var varlag = VarLag.kr(input, 0.1).poll(label: \varlag);
}.play
)

produces:

input: 142.476
varlag: 143.096
input: 141.864
varlag: 143.096
input: 141.251
varlag: 143.096
input: 140.639
varlag: 143.096
input: 140.027
varlag: 143.096
input: 139.415
varlag: 143.096
input: 138.802
varlag: 143.096
input: 138.19
varlag: 143.096
input: 137.578
varlag: 143.096
input: 136.966
varlag: 143.096
input: 136.354
varlag: 143.096

It works with warp: \linear, but with other parameter settings, including the default, it keeps producing the same intial output value.

Cheers,
Luc

2

VarLag is really meant for stairstep signals, not continuously changing ones.

You can fake it like this:

(
{
	var input = LFNoise1.kr(0.5, 50, 100).poll(label: \input);
	var trig = Impulse.kr(ControlRate.ir * 0.5);
	var varlag = VarLag.kr(Latch.kr(input, trig), 0.1).poll(label: \varlag);
}.play
)

(Hint: VarLag is a real UGen for linear, but it’s an EnvGen for all other curvatures… now think about, what is the fastest possible rate at which an EnvGen can be triggered?)

hjh