X86 FIXED PT

1
REAL-TIME SYNTHESIZER
HARDWARE DEV.
SOFTWARE DEV.
MATLAB SOFTWARE SYNTHESIZER
X86 FIXED PT RESONATOR
PC TIMING INTERRUPTS
EXTERNAL SOURCE FORMANT ID
PC / OS INTERFACE
FIXED POINT SYNTHESIZER
ASPIRATION NOISE STUDY
FLOATING PT SYNTHESIZER
WIREWRAP CIRCUIT BRD.
FM NOISE STUDY
REAL-TIME SYNTHESIZER
AM NOISE STUDY
GLOTTAL SOURCE MODELING
Figure 6.1 Overview of research development.
Initial work resulted in a real-time synthesizer,
which employed X86 native signal processing
capability on a PC platform and a custom made
wirewrap adapter card with timing, interrupt, and
D/A circuitry. Work next focused on improvement
of the synthesizer glottal source waveform. A
MATLAB software synthesizer was then created to
more quickly evaluate new synthesizer algorithms.
Problems with modeling vowel quality then
motivated research into external source
identification of the vocal tract. Lastly,
nonperiodic properties were analyzed and modeled
as aspiration noise, FM (frequency modulation),
and AM (amplitude modulation).