Acorn Speech System User Guide [Remastered PDF]

avoid work duplication! collaborate on the archival of acorn literature!
Post Reply
User avatar
dv8
Posts: 333
Joined: Mon Jun 22, 2009 10:07 pm
Contact:

Acorn Speech System User Guide [Remastered PDF]

Post by dv8 » Thu Mar 21, 2019 2:44 pm

Attached is a remastered PDF of the Acorn Speech System User Guide.

The zip file also includes an SSD disc image containing the listings from the manual.

Speech_System_User_Guide.zip
(264.88 KiB) Downloaded 99 times

Other related manuals:
Computer Concepts Speech ROM Instructions
Last edited by dv8 on Fri May 29, 2020 4:09 pm, edited 2 times in total.

User avatar
vanekp
Posts: 907
Joined: Thu Nov 30, 2000 7:09 am
Location: The Netherlands
Contact:

Re: Acorn Speech System User Guide

Post by vanekp » Fri May 24, 2019 12:26 pm

Thanks :D
Peter.

User avatar
Rich Talbot-Watkins
Posts: 1662
Joined: Thu Jan 13, 2005 5:20 pm
Location: Palma, Mallorca
Contact:

Re: Acorn Speech System User Guide

Post by Rich Talbot-Watkins » Thu Jun 06, 2019 1:33 pm

What is the actual audio model used by the speech system? The manual states that audio is divided into frames of 1/40th second, each frame having "energy", "pitch" and ten "reflection parameters" denoted K1-K10, but gives no further indication of what that actually means.

Anyone know what algorithm the speech chip uses to convert this into audio, and conversely how one encodes audio in this format? The manual also tantalisingly states:
The Speech Processor decodes the data to construct a time-varying digital filter model of the vocal tract. This model is excited with a digital filter representation of either glottal air impulses (voiced sounds) or the rush of air (unvoiced sounds).
I couldn't find any details on the meaning of K1-K10 in the TMS 5220 datasheet either, although page 27 has a whole bunch of values corresponding to the bit values.

User avatar
tricky
Posts: 4687
Joined: Tue Jun 21, 2011 9:25 am
Contact:

Re: Acorn Speech System User Guide

Post by tricky » Fri Jun 07, 2019 7:28 am

Have a look for qboxpro, there is also a post on Atari age where someone reimplemented it for Mac and a command line python encoder.

User avatar
dv8
Posts: 333
Joined: Mon Jun 22, 2009 10:07 pm
Contact:

Re: Acorn Speech System User Guide

Post by dv8 » Fri Jun 07, 2019 9:45 am

The encoder for MacOS is here: https://github.com/patrick99e99/BlueWizard

The Python version is here: https://github.com/ptwz/python_wizard

Post Reply

Return to “scanning of books, magazines, ads and letters”