INTERNATIONAL BUSINESS MACHINES CORP. (IBM) - continued

Armonk, New York


SSSHP 163  IBM TASS-III ELECTRONIC CHARACTERIZATION
                     (Pages 40 - 43z) 
 
 
                    CONTENTS


Page                       Description
 No.

40. Diphone Library 5B

File format, data format, hexadecimal to decimal conversion, byte 
assignment to synthesizer control channels, staggered byte-transfer, 
graphic display of control data.


40B-C. TASS-III block diagram and level calibration

Discussion of page 40H.


40D-E. Hex-to-decimal conversion charts


40F-G. IBM 2250 Graphic Display, control data


40H. TASS-III Block Diagram


41A-H. TASS-III transfer functions

Complex-plane transfer functions for the TASS-III circuits.
Fricative filter tuning formulas. Simplified circuit drawings of
Hiss Gen, summers, digital attenuators, formant filters, and
fricative zero.

 
42A. HISS Low Pass Filter response


42B. Filter KH transfer function measurement. 

KH compensates for missing formants above F4, making first four 
formant amplitudes about the same (see attachment 42D). 


42C-F. Formant-chain transfer function measurements


42G-H. Measurement of Fn-phase importance

Attachments 42G and 42H show the importance of the phase relation-
ship between FN and the formant chain. If the phase of FN is in-
verted (42H), a zero appears in the transfer function as AN is 
increased from "00". 


42I. Fricative Filter transfer function measurement

Attachment 42I is the transfer function of fricative filter with 3 
kHz high-pass filter temporarily bypassed. 


42J-K. TASS-II & TASS-II noise spectrum measurement

Attachments 42J and 42K show spectral measurements of the TASS-II 
and TASS-III noise sources, each made through a 4-pole 10 kHz 
maximally-flat filter.


43A-Z. TASS-III circuit diagram photocopies

Most of the TASS-III circuit diagrams were copied from 25-year old
faded blueprints. If a particular item is unreadable on one page,
it may be readable on another page.