prototypical vocal synth

This assignment is to make a bank of recirculating comb filters with associated delays, all operating on an incoming sound so as to make copies of it with varying delays and pitches (imposed by the comb filters). The patch should be able to make outputs like these two.

• Make a sampler, which could be simply based on "tabplay", that plays from a wavetable pre-loaded with an audio recording. You can make your own short recording (a second or two is fine) or use this one. The sample should be read with a "loadbang" message using the soundfiler object, and should be long enough to hold the whole sample (hint: the soundfiler object can be directed to resize the wavetable to fit the sample you're loading).
• Make an abstraction that sends an audio input through BOTH a non-recirculating delay (to delay the sound) and a recirculating delay line with delwrite~ and delread4~ which will have a short delay time and a high feedback gain (such as 0.95), to give a pitch to the delayed sound. (Use the interpolating delread4~ object, not the non-interpolating delread~, to get accurate control over delay length - this will affect pitch accuracy). Make four copies of the abstraction, with arguments "1" through "4", to supply a voice number to the abstraction. Use a throw~ object inside the abstraction to send the output of each copy to one "catch~" in the main patch.
• Set up a control structure as follows. Make a receive object inside the abstraction with a "$1" in its name, so that different copies of the abstraction can receive the message under different names. The message should contain a pitch (in MIDI units) and a delay time (in milliseconds). The delay length for the recirculating delay should be set to 1000 divided by the pitch in Hz.
• Make message boxes, each of which sends a message to each of the abstraction copies. For instance, to make a chord, try:

  ;
  voice-1 67 0;
  voice-2 69 0;
  voice-3 72 0;
  voice-4 77 0;
  

  and to make delayed voices with different pitches,

  ;
  voice-1 60 0;
  voice-2 62 150;
  voice-3 65 300;
  voice-4 70 450;
  

• Make a button to play the recording back, and an output gain control, so that you can set the output gain, then click on one of the message boxes, then click the "playback" button, to hear the chord or delayed voices.

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