Noise attack weirdness while filtered

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1

Okay, I’m fiddling around with trying to make a whistle sound, using resonant filters.
What I want is to have the noise have an attack, and the resonance for the filter also have an attack. But when I wrap the play command inside the fx command for the filter, the noise attack seems to go away:

with_synth :noise do
  handle = play :c3, attack: 0.25, decay: 0, sustain: 1.0, release: 0.25
end


sleep 2


with_fx :nrlpf, cutoff: :c6, res: 0 do |lh|
  with_fx :nhpf, cutoff: :c6 do
    with_synth :noise do
      handle = play :c3, attack: 0.25, decay: 0, sustain: 1.0, release: 0.25
    end
    sleep 0.125
    control lh, res: 0.99, res_slide: 0.25
    sleep 1.25
    control lh, res: 0.0, res_slide: 0.01
    
  end
end

Any idea what’s going on here? How do I hack around it? I’m trying to emulate a human whistle, which has a short attack at the beginning. The fadeout seems to be working, but the fade in is still problematic.
Any insights would be most appreciated.

1 Like
2

Okay, the problem seems to be with the normalized filters. If I use the non-normalized versions, it works okay.
Which makes sense – it’s normalizing the quiet part, aka making it loud!