@seansleblanc/pink-trombone

headless port of Neil Thapen's Pink Trombone

npm i @seansleblanc/pink-trombone

import {
	Glottis,
	Tract,
} from './pink-trombone';

Glottis.isTouched = true;

notes

• alwaysVoice and autoWobble from the original are disabled, and not exposed
  • alwaysVoice is not needed, since you can set Glottis.isTouched = true and never turn it off to get the same behaviour
  • autoWobble is relatively simple to reproduce: it's just noise applied to the vibrato
• the interfaces are currently singletons and are initialized on import
• if running in chrome, autoplay restrictions will prevent the AudioContext from playing sound immediately; clicking or pressing a key will unmute it
• i'm no expert on linguistics/vocalization and the original source is not documented in much detail, so take my explanations of the api with a grain of salt

api

• Glottis.isTouched: whether it's speaking
  • just true or false
• Glottis.UIFrequency: pitch
  • usually want something in the triple digits
  • <50 is barely audible
  • >2000 is a screech and has audible artifacting
• Glottis.UITenseness: breathiness
  • usually want something around 0.5
  • 0 is more breathy
  • 1 is sharp and a bit robotic
  • >1 kinda does both
  • negative breaks it
• Glottis.vibratoAmount:
  • usually want 0 - 0.1 range
  • 0 is none
  • 1 is "full" range
  • >1 is broken cheeping
  • negative is the same
• Tract.velumTarget: back roof of the mouth; controls how nasal things sound
  • 0 is closed
  • 1 is very nasal
  • >1 is even more nasal
  • negative is the same
• Tract.diameter: shape of the tract, represented by a 44-index array from throat to lips
  • standard range of each point is roughly 0-3, with the throat being smaller
  • the original UI modifies the tract shape with radial deformers to simulate a tongue
• Tract.targetDiameter: interpolation target for Tract.diameter; usually you want to set this instead of modifying Tract.diamater directly
• Tract.restDiameter: initial shape of the tract; useful for resetting
• Tract.noseDiameter: shape of the nose, represented by a 28-index array from velum to nostril
  • standard range is roughly 0-2, with edges being smaller