Killing a sample softly on midi note_off

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1

Stopping a running sample on midi note_off using kill is working fine. Is it possible to invoke the release time rather than it just stopping it dead? Not the biggest deal, but it would be very nice.

2

I think after receiving the signal you can loop 8 times (for instance) and use control s, amp: (line 1, 0, steps: 8).tick to ā€œsimulateā€ a release.

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3

Thank you that works pretty well.

4

hi @soxsa
some code to illustrate your post would be welcome :slight_smile: we learn from others
cheers

5

Of course, see below. Iā€™ve tweaked the idea in a couple of ways:

  • Toggling the ā€˜obey note offā€™ feature using a special midi key (C3 in this case), so you can choose to let the sample run or not
  • Rather than use a linear tail-off for the amplitude, a hard-coded log-type which is bit more natural.

This snippet uses my local samples rather than builtin, but easy switch out. This code isnā€™t bullet proof as Iā€™m only saving a ref to one sample at a time, so you can fox it by hitting lots of keys at once. Ideally it could do with maintaining some kind of stack of refs. But itā€™s fine for what I want.

Hope this is of some use.

#Songo
#MIDI keyboard-triggered samples

use_bpm 180
d = $mymusicpath + "songo/stems/"
set :obey_note_off, true

live_loop "keys" do
  #Trigger samples based on the note_on
  #Choosing the sample based on the note played
  #Starting with C4=60
  use_real_time
  note,volume = sync "/midi:mpk_mini:2:1/note_on"
  puts "note " + note.to_s + " volume " + volume.to_s
  
  a = 0.4 #Scale the sample volume.
  with_fx :reverb, mix: 0.0 do
    with_fx :echo, phase: 1.5, mix: 0.0, decay: 10.0 do
      case note
      when 60
        s = sample d, "vox espeak I want free life", amp: a * 0.3
      when 61
        s = sample d, "vox i want free life", amp: a
      when 62
        s = sample d, "vox i wonder why", amp: a
      when 63
        s = sample d, "vox mmm", amp: a, release: 0.5
      when 64
        s = sample d, "vox the open air", amp: a
      when 65
        s = sample d, "vox the row began", amp: a
      end
      set "keysample", s
    end #echo
  end #reverb
end

live_loop "toggle_obeynoteoff" do
  #Toggle the 'kill on note_off' feature using the C3 key
  use_real_time
  note,volume = sync "/midi:mpk_mini:2:1/note_off"
  if note == 48 then
    o = get[:obey_note_off]
    o = !o
    set :obey_note_off, o
  end
end

live_loop "kill" do
  #Kill the note on midi note_off
  #First use a loop to tail off the sample
  #and simulate a slow release
  use_real_time
  note,volume = sync "/midi:mpk_mini:2:1/note_off"
  in_thread do
    s = get[:keysample]
    o = get[:obey_note_off]
    if s and o then
      #Use a log-type tail off
      tailoff = [1.0, 0.5, 0.2, 0.1, 0.05, 0.02, 0.01]
      7.times do
        #control the sample, setting the amp lower and lower
        control s, amp: tailoff.tick * 0.4
        sleep 0.5
      end
      #Finally kill the sample
      kill s
    end
  end
end
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