Sonic Charge Bitspeek RE - Manual (Page 3)

Introduction
I N T R O D U C T I O N
Bitspeek is a real-time pitch-excited linear prediction codec effect. Right now
you are probably thinking, "oh, another one of those"? Or perhaps not. Chances
are that you have never heard about "linear prediction", although most of us
use it daily when we talk on our cell phones. Linear prediction coding is a voice
compression technology that appeared in commercial products in the
seventies and was implemented in some well-known speaking toys of the early
eighties.
We have applied this technology to create an audio effect that analyzes audio,
extracts a number of parameters (including pitch, volume and formant data)
and then resynthesizes the audio using a simple oscillator, noise and filter
architecture.
A number of playback parameters can adjust the pitch and tonal quality of the
sound. It is possible to play the pitch with MIDI notes and you can create
tempo-synchronized "formant freezing effects". Despite having only a few
simple controls, this box can produce a broad range of sounds from cheap
speaking toys to high-end vocoder and talkbox effects.
! © 2012 Sonic Charge! 3