rt_lpc is a light-weight application that performs real-time LPC analysis and synthesis. It features the following:
- real-time LPC analysis
- real-time LPC synthesis
- visualization of original, predicted, and error waveforms
- visualization of vocal tract shape from LPC coefficients
- adjustable LPC analysis order
- adjustable synthesis pitch shift
- MIDI controlled pitch (hit ‘m’)
- lots of other choices (pitch pulse source selection, emphasis filter)
- STFT plot
- modular LPC library
- available on MacOS X, Linux, and Windows under GPL
- part of the sndtools distribution

soundlab.cs.princeton.edu/software/rt_lpc/
en.wikipedia.org/wiki/Linear_predictive_coding
github.com/lewark/lpc.lv2








