Thread View: comp.dsp
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Started by Andrew Nisbet (PhD)
Wed, 04 Nov 1992 14:17
SUMMARY Digital Effects Source Code request
Author: Andrew Nisbet (PhD)
Date: Wed, 04 Nov 1992 14:17
Date: Wed, 04 Nov 1992 14:17
95 lines
4164 bytes
4164 bytes
Hi,
I received a lot more "me too" requests than actual replies, but
any way here are the interesting replies.
From Jos.Groot@fel.tno.nl Fri Oct 30 11:22:47 1992
STUFF DELETED
Best regards, Jos Groot
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In reaction to requests of some people for details about the analog I/O
board I built for a PC, I recently uploaded the ADDA10.ZIP archive
(directory <MSDOS.SOUND>) to the SIMTEL anonymous FTP site (address
WSMR-SIMTEL20.ARMY.MIL, 192.88.110.20):
<MSDOS.SOUND>
ADDA10.ZIP ADC/DAC board for DSP experiments;TP src/exe
The archive describes how to build and use a simple low cost analog I/O
extension board for PC's. It utilizes the 8-bit AD7569 IC containing a
500 KHz analog-to-digital converter (ADC) and a 1 MHz digital-to-analog
converter (DAC). The card can for example be used to sample sound
with the ADC and play it back through the DAC in real time, possibly after
some `on-the-fly' digital signal processing. Files included are:
1. construction/operation description
2. electronic/layout sketch diagrams
3. Turbo Pascal 6.0 source and executable code for using the card. It includes
routines implementing two digital (guitar) sound effects, i.e., a distortion
and echo. These routines demonstrate the basics of the digital sound
processing techniques used in dedicated sound effect processors.
The files of 1. and 2. are suitable for downloading to HP Laserjet or
PostScript compatible printers.
--
Jos Groot (jos.groot@fel.tno.nl)
Physics and Electronics Laboratory TNO-FEL
P.O.box 96864
2509 JG The Hague, The Netherlands
Tel. (31) 70 3264221, ext. 262
----------------------------------------------------------------------------------
From jscw+@andrew.cmu.edu Sat Oct 31 08:39:58 1992
STUFF DELETED
I have a book that seems to descibe the process of creating digital
effects algorythms without actually supplying any useful code. Instead,
logical block diagrams and lengthy text explanations are provided. When
I get to the section in question, I'll have a bit more to say though. It
does cover several filter types, simple reverb, and chorus, but right
now I'm trying to figure out the FFT section.... The book is called
_Musical_Applications_Of_Microprocessors_, though you will probably have
no difficulty finding a better text, as this is only an introduction to
the basic concepts.
Jamieson Schulte
jscw@andrew.cmu.edu
------------------------------------------------------------------------
From voss@fubar.cs.montana.edu Tue Nov 3 06:25:50 1992
STUFF DELETED
This is Jim Voss (maybe again)
I'm not too sure If my last email will reach you or not
If not I may have some interesting DSP effects programs that
may interest you.
Reverb, Pitch shifting, distortion etc.
All for the Texas Instruments TMS320-25.
./
-------------------------------------------------------------
I have the source files (ASSEMBLY LANGUAGE), I would prefer to put
them on a ftp site rather than post them to USENET, so if some kind
soul could please give me the neccessary location of such a site that I could
upload these files to.
Thanks to all who replied (especially Mr Jim Voss), the only other
stuff I have to offer is to look into dr.bub Motorola source
code, which has stuff for ffts and virtually any kind of digital
filter you might want to try.
Thanks again,
Andy N.
--
Andy Nisbet, Dept. of Electrical Engineering, University of Manchester,
Manchester M13 9PL, England.
Internet: andy@spec0.ee.man.ac.uk Janet: andy@uk.ac.man.ee.spec0
ARPA: andy%ee.man.ac.uk@nsfnet-relay.ac.uk Wet String: (+44)-61-275-4561
Digital effects for musical applications
Author: Quinn Jensen
Date: Mon, 16 Nov 1992 17:34
Date: Mon, 16 Nov 1992 17:34
193 lines
7597 bytes
7597 bytes
Allow me to comment briefly on the FAQ about DSP effects. I'll forward a copy to Phil for the official FAQ if appropriate. Sample Mot DSP56001 code for stereo reverb, chorus, and flange is included with my freeware assembler for the 56001. V1.1 was recently posted to alt.sources and may be found (for the moment) via anonymous ftp on newsun.novell.com /pub/a56v.1.1.tar.Z. My reverb code, as well as another implementation can be found on Dr. Bubb. Attached are some additional postings with references, etc. Quinn Jensen jensenq@qcj.icon.com jensenq@novell.com ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ From: jk87377@cc.tut.fi (Juhana Kouhia) Newsgroups: comp.music,rec.music.synth,rec.music.makers Subject: Re: Effects Processing Algorithms? Date: 2 Aug 91 22:32:33 GMT In article <1991Aug2.122201.13558@unhd.unh.edu> pas1@kepler.unh.edu (Paul A Simoneau) writes: > >The only answer I have received was : > >Musical Applications of Microprocessors, 2nd Ed. >Hal Chamberlinj, Hayden Book Company, 1985. William Alves posted this recently, how did you *all* missed it? ========================================================================== From: alves@calvin.usc.edu (William Alves) Newsgroups: comp.music,rec.music.synth,rec.music.makers Subject: Re: Effects Processing Algorithms? Date: 26 Jul 91 18:23:10 GMT Here are some good references (in no particular order): Blesser, Barry and J. Kates. "Digital Processing in Audio Sinals." In A. V. Oppenheim, ed. Applications of Digital Signal Processing. Englewood Cliffs, NJ: Prentice-Hall, 1978. Digital Signal Processing Committee of IEEE Acoustics, Speech, and Signal Processing Society, ed. Programs for Digital Signal Processing. New York: IEEE Press, 1979. Strawn, John, ed. Digital Audio Signal Processing: An Anthology. Los Altos, CA: W. Kaufmann, 1985. [Contains Moorer J.A. "About This Reverb..." and contains an article which gives a code for Phase Vocoder -- great tool for EQ, for Pitchshifter and more --jk] Moorer, James A. "About This Reverberation Business." Computer Music Journal 3, 20 (1979): 13-28. (Also in Foundations of CM below). [Ok article, but you have to know basic DSP operations --jk] Dodge, Charles and Thomas A. Jerse. Computer Music: Synthesis, Composition, and Performance. New York: Schirmer Books, 1985. [Maybe you should leave this book and take...] Moore, F. Richard. Elements of Computer Music. Englewood Cliffs, NJ: Prentice-Hall, 1990. [...this book instead; recommented book --jk] Roads, Curtis and John Strawn, ed.The Foundations of Computer Music. Cambridge, MA: MIT Press, 1985. [Contains article on analysis/synthesis by Strawn, recommented article, also an another article maybe by Moorer J.A. --jk] Bill Alves ========================================================================== Check more articles from Journal of the Audio Engineering Society (JAES), for example more articles by Strawn. Start with "Elements of Computer Music" by Richard Moore.... Order it to your library if not exists! Juhana Kouhia -------------------------------------------------------------------------- -------------------------------------------------------------------------- From: jensenq@qcj.icon.com Subject: The Computer Music and Digital Audio Series Keywords: DSP, audio signal processing, effects, music Date: Wed, 28 Aug 91 15:00:28 GMT I just received _Digital Audio Signal Processing_ yesterday. I have been consuming it voraciously. I thank Bill Alves and Juhana Kouhia for the pointers. I also have ordered _Elements of Computer Music_ from Prentice Hall and am anxiously awaiting its arrival as well. Here is some ordering information for those who might be interested. Prentice Hall RTE. 9W Englewood Cliffs, NJ 07632 Individual ordering - 201-767-5937 _Elements of Computer Music_, $38.00 + $4.00 shipping UPS surface approx 2.5 weeks delivery ISBN: 0-13252-552-6 I called the publisher (W. Kaufmann) about _Digital Audio Signal Processing_ and they referred me to A-R Editions, who shipped the book the next day! I had it in my grasp in well under a week, via UPS surface. The shipping charge was $2.50 if I recall correctly. A-R Editions 801 Deming Way Madison, Wisconsin 53717 608-836-9000 (They accept VISA orders) This title and others in "The Computer Music and Digital Audio Series" are as follows: John Strawn, ed., _Digital Audio Signal Processing_, 283 pages, $34.95, ISBN 0-86576-082-9 Curtis Road, ed., _Composers and the Computer_, 201 pages, $27.95, ISBN 0-86576-085-3 John Strawn, ed., _Digital Audio Engineering_, 144 pages, $29.95, ISBN 0-86576-087-X Deta S. Davis, _Computer Applications in Music: A Bibliography_, 537 pages, $49.95, ISBN 0-89579-225-7 Ken C. Pohlmann, _The Compact Disc: A Handbook of Theory and Use_, 288 pages, $45.95 (cloth) ISBN 0-89579-234-6, $29.95 (paper) ISBN 0-89579-228-1 Forthcoming books: Curtis Roads, _A Computer Music History: Musical Automation from Antiquity to the Computer Age_ Joseph Rothstein, _MIDI: A Comprehensive Introduction_ David Cope, _Computer Analysis of Musical Style_ Dexter Morrill and Rick Taube, _A Little Book of Computer Music Instruments_ I would enjoy hearing any comments or discussions on these titles. Quinn Jensen jensenq@qcj.icon.com ------------------------------------------------------------------------- ------------------------------------------------------------------------- From: jensenq@qcj.icon.com (Quinn Jensen) Subject: Re: The Computer Music and Digital Audio Series Contents of _Digital Audio Signal Processing, An Anthology_: 1. Introduction to the mathematics of DSP (F. Richard Moore) (Not a bad little text) 2. Introduction to digital filter theory (Julius O. Smith) (Not a bad little text, either) 3. Spiral Synthesis (Tracy Lind Petersen) (first published account of a new synthesis technique) 4. Signal processing aspects of computer music (J. A. Moorer) (James Moorer's classic article--discusses many synthesis techniques. Reverb algorithms. More than 6 pages of refs) 5. An introduction to the phase vocoder (J. W. Gordon, J. Strawn) (Includes source code for a phase vocoder--a powerful method for synthesis, pitch shifting, time scale modification, etc) And from the dust jacket- The articles in this book were written for both the beginner and the advanced practitioner of digital signal processing, especially as it relates to digital audio. Digital signal processing gives insight into matters such as digitization and sampling, inherent in the creation of digital audio. Musically useful tools fot the manipulation of sound, such as filtering, reverberation, spectral analysis, and cross-synthesis, are anchored in digital signal processing as well. --
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