Re: Linear Prediction in Csound

Date	1999-03-16 13:19
From	Michael Gogins
Subject	Re: Linear Prediction in Csound
	One of the reasons to go with text is that the Document Object Model of the W3C defines an object oriented interface, already implemented in Java by Sun and in C++ by Microsoft, for parsing XML files into DOM objects. In practice, one's primary data object or model object is also, or is attached to, a DOM object. This parsing code is robust and easy to use, though not as fast as binary format reading and writing. The advantages of XML are many, but for musicians it is a standard form of notation that can be cut and pasted between applications and files without breaking anything, whether by hand or by program. This is one of the stated goals of SDIF, but XML has a far wider audience and is already understood. I have used a hybrid XML format in which the tags and some data is text, but other data is length-prefixed binary. This, for example, forms the element of the Csound structured data file (csd file), which I created. But I think the advantages of using binary format for the columns of a time/frequency analysis, as opposed to a text printout of the vector, are slight. -----Original Message----- From: Richard Dobson To: csound@maths.ex.ac.uk Date: Tuesday, March 16, 1999 4:23 AM Subject: Re: Linear Prediction in Csound >I'm not too worried about the disk - that's what it does. I'm thinking >of the poor human trying to scroll through it in WordPad or emacs... and >then trying to repair it when they make a typo... > >We can write pvoc data to a text file alreday, in CDP, but this is for >extra, diagnostic purposes. It is not the primary format, however. I >will soon adapt my play program to render analysis files directly, for >which the binary format is naturally appropriate, efficient and safe. > >There are times when it is useful to print out the sample values in a >WAVE file; but I can't imagine anyone would use text as the primary >working format for all their compositions! > >Richard Dobson > >Michael Gogins wrote: >> >> As for dealing with pvoc in text form, my disk is 14 gigabytes and only half >> full, even though loaded with C++, VB, Java, Csound, Silence, Mathematica, >> MS Office, all my pieces in mp3s, the master for one album and part of >> another. I think I can handle a few megabytes. Oh, and some games, Cool Edit >> Pro, and Emagic Gold. Oh, and parts of jam sessions recorded to HD in >> float... >> >> -----Original Message----- >> From: Richard Dobson >> To: csound@maths.ex.ac.uk >> Date: Monday, March 15, 1999 2:37 PM >> Subject: Re: Linear Prediction in Csound >> >> >I will take another look at the SDIF spec. If the format is still fluid, >> >than this may be an excuse to get it solidified. I remember feeling that >> >too many essential items of information were delegated to optional >> >chunks. >> > >> >A pvoc analysis file can be megabytes in size - easily larger than the >> >soundfile it represents. Can anyone really want to deal with it in text >> >form? >> > >> >Richard Dobson >> > >> > >> >Michael Gogins wrote: >> >> >> >> I suggest you use SDIF as this is more in keeping with the public-domain >> >> character of our work. I also believe it would be technically adequate. >> >> >> >> As an alternative, I suggest using Extensible Markup Language (tagged >> text >> >> files) as it is easier to code readers and writers for this type of >> format, >> >> and to use it from and for other applications. >> >> >> > >> >-- >> >Test your DAW with my Soundcard Attrition Page! >> >http://wkweb5.cableinet.co.uk/rwd >> >CDP homepage: http://www.bath.ac.uk/~masjpf/CDP/CDP.htm > >-- >Test your DAW with my Soundcard Attrition Page! >http://wkweb5.cableinet.co.uk/rwd >CDP homepage: http://www.bath.ac.uk/~masjpf/CDP/CDP.htm Received: from shaun.maths.bath.ac.uk by omphalos.maths.Bath.AC.UK id aa12578; 16 Mar 99 16:49 GMT Received: from [144.173.6.14] (helo=exeter.ac.uk) by shaun.maths.bath.ac.uk with esmtp (Exim 1.92 #2) for jpff@maths.bath.ac.uk id 10Mx2O-0002qY-00; Tue, 16 Mar 1999 16:49:52 +0000 Received: from noether [144.173.8.10] by hermes via SMTP (QAA10457); Tue, 16 Mar 1999 16:28:59 GMT Received: from exeter.ac.uk by maths.ex.ac.uk; Tue, 16 Mar 1999 16:28:45 GMT Received: from smtp1.fas.harvard.edu [140.247.30.81] by hermes via ESMTP (QAA17486); Tue, 16 Mar 1999 16:28:41 GMT Received: from [140.247.43.120] (nas3-46.fas.harvard.edu [140.247.43.146]) by smtp1.fas.harvard.edu with ESMTP id LAA08067; Tue, 16 Mar 1999 11:28:06 -0500 (EST) X-Sender: starrett@pop.fas.harvard.edu Message-Id: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Area: People, Technology and Music Date: Tue, 16 Mar 1999 11:25:51 -0500 To: Csound List From: Charles Starrett Subject: Re: phasor & tablemix Sender: owner-csound-outgoing@maths.ex.ac.uk Precedence: bulk I'm still stumped...I've tried all sorts of different methods to try to get rid of the click--mostly I'm focusing on the possibility that my cross-fade envelope ("kross") is not perfectly timed with the table swaps... Anyhow, my last post had a poor wrap in it, so I'm including the orc/sco pair again having made it a little more "email friendly." Thanks again! ~~Charles ;----------------------------------- ;clksweep.orc ; sr = 44100 kr = 4410 ksmps = 10 nchnls = 1 instr 3 iamp = p4 ; ipitch = p5 ; base pitch iseqfn = p6 ; f-table selection f-table istart = p7 ; start position on seqfn idir = p8/abs(p8) ; step dir. through table (1 or -1) idur = abs(p3/p8) ; duration of each crossfade irange = p8 - idir ; # of positions to step through ; lookup starting and ending f-tables for each cross-fade kphs phasor 1/p3 kndx = kphsp8 knxtndx = kndx+idir ktbl table kndx, iseqfn, 0, istart knxttbl table knxtndx, iseqfn, 0, istart printk (idur/2), kphs ; crossfade between two tables using ramp (f198) and write to f199 kross oscili 1, 1/idur, 198 kfade = 1 - kross tablemix 199, 0, 4096, ktbl, 0, kfade, knxttbl, 0, kross tablegpw 199 iattrel = .05 ; attack and release times kenv linseg 0, iattrel, iamp, p3-2iattrel, iamp, iattrel, 0 asig oscil kenv, cpspch(ipitch), 199, -.5 out asig endin ;----------------------------------- ;clksweep.sco ; ;-----------------\ ; function tables \ ;-----------------\ f1 0 4097 10 1 f2 0 4097 10 1 0 .333333 0 .111111 0 .037037 0 .012345 f3 0 4097 10 0 0 1 f4 0 4097 10 0 0 0 0 1 f5 0 4097 10 0 0 1 0 1 f6 0 4097 10 0 0 1 0 .6 0 1 f7 0 4097 10 0 0 0 0 0 0 1 0 1 f8 0 4097 10 1 .5 .333333 .25 .2 .166666 .142857 .125 .111111 .1 f9 0 4097 10 0 0 0 0 0 0 0 0 0 0 1 ; list of function tables to fade between f191 0 16 -2 2 8 1 1 3 4 5 6 7 9 ; iseqfn table ; other function tables f198 0 17 -7 0 4 0 8 1 4 1 ; kross table f199 0 4097 10 1 ; asig table ;-----------------\ ; note statements \ ;-----------------\ ;i3 0 2 10000 5.05 191 3 1 ;i3 + 7 10000 5.10 191 0 +9 i3 + 14 10000 5.05 191 9 -9 e -- /----Charles D. Starrett-----\ "I do not feel that \| / \| ____ \| \| ____ \| \| my research suffered unduly \| /\ \| \|-- \|-\| ___\| \| \| from the fact that I enjoyed it." \| \|___ \|____\| \| \|_____\| \| Daniel Miller, \--starrett@fas.harvard.edu--/ Modernity--an Ethnographic Approach Received: from shaun.maths.bath.ac.uk by omphalos.maths.Bath.AC.UK id aa13348; 16 Mar 99 21:36 GMT Received: from [144.173.6.14] (helo=exeter.ac.uk) by shaun.maths.bath.ac.uk with esmtp (Exim 1.92 #2) for jpff@maths.bath.ac.uk id 10N1VU-00031a-00; Tue, 16 Mar 1999 21:36:13 +0000 Received: from noether [144.173.8.10] by hermes via SMTP (VAA06309); Tue, 16 Mar 1999 21:32:06 GMT Received: from exeter.ac.uk by maths.ex.ac.uk; Tue, 16 Mar 1999 21:31:53 GMT Received: from jaguars-int.cableinet.net [193.38.113.9] by hermes via SMTP (VAA00109); Tue, 16 Mar 1999 21:31:53 GMT Received: (qmail 18271 invoked from network); 16 Mar 1999 21:28:22 -0000 Received: from unknown (HELO cableinet.co.uk) (194.117.146.42) by jaguars with SMTP; 16 Mar 1999 21:28:22 -0000 Message-ID: <36EECF1B.97A3911B@cableinet.co.uk> Date: Tue, 16 Mar 1999 21:37:31 +0000 From: Richard Dobson Organization: Composers Desktop Project X-Mailer: Mozilla 4.5 [en] (WinNT; I) X-Accept-Language: en MIME-Version: 1.0 To: csound@maths.ex.ac.uk Subject: Re: Linear Prediction in Csound References: <002d01be6faf$934fe800$79d496c0@Realizer.ngt.sungard.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-csound-outgoing@maths.ex.ac.uk Precedence: bulk Well, I will certainly look at an XML representation of pvoc analysis files with interest, but the main advantages for me of a binary format are streamability (as for ordinary soundfiles), and flexibility in defining multifarious pvoc formats (different analysis rates, decimation factors, window sizes, etc). The binary format will also be smaller than the text equivalent, by at least a factor of two - assuming that six decimal places plus the point are used for each value, and one tab, and one newline (two bytes on disk for DOS). If ad-lib white-space is used, the file-size will grow accordingly. At the moment, the Microsoft WAVE-EX format looks extremely attractive, as it is by definition streamable, and allows new sub-formats to be defined without the need to register them with Microsoft. One goal I have is a 'multi-channel' pvoc format (eg for stereo streams and above), and chaining of frequency-domain processes in real-time as in DirectShow. The analogy of editing pvoc files in the way one can edit a single time-domain sample does not quite hold, as in a pvoc stream of overlapping frames, several frames will need to be edited together. The potential for corruption of the format through manual editing and cut+paste must be very high. The text format will certainly have value for many purposes, but I cannot see it other than as supplementary to a main binary format. BTW: Martin Puryear has just posted a new version of the Microsoft WAVE-EX document, and I will send it to my website immediately. It looks as if the main format is now fixed, as the document concludes by saying that the format 'can be supported today'. Richard Dobson Michael Gogins wrote: > > I have used a hybrid XML format in which the tags and some data is text, but > other data is length-prefixed binary. This, for example, forms the > element of the Csound structured data file (csd file), which I > created. But I think the advantages of using binary format for the columns > of a time/frequency analysis, as opposed to a text printout of the vector, > are slight. > -- Test your DAW with my Soundcard Attrition Page! http://wkweb5.cableinet.co.uk/rwd CDP homepage: http://www.bath.ac.uk/~masjpf/CDP/CDP.htm Received: from shaun.maths.bath.ac.uk by omphalos.maths.Bath.AC.UK id aa13833; 17 Mar 99 1:06 GMT Received: from [144.173.6.14] (helo=exeter.ac.uk) by shaun.maths.bath.ac.uk with esmtp (Exim 1.92 #2) for jpff@maths.bath.ac.uk id 10N4nQ-00037f-00; Wed, 17 Mar 1999 01:06:56 +0000 Received: from noether [144.173.8.10] by hermes via SMTP (BAA13766); Wed, 17 Mar 1999 01:05:54 GMT Received: from exeter.ac.uk by maths.ex.ac.uk; Wed, 17 Mar 1999 01:05:42 GMT Received: from smtp0.mindspring.com [207.69.200.30] by hermes via ESMTP (BAA14709); Wed, 17 Mar 1999 01:05:41 GMT Received: from Realizer (user-38ld2qc.dialup.mindspring.com [209.86.139.76]) by smtp0.mindspring.com (8.8.5/8.8.5) with SMTP id UAA09563; Tue, 16 Mar 1999 20:05:38 -0500 (EST) Message-ID: <002d01be7012$53c51620$79d496c0@Realizer.ngt.sungard.com> From: Michael Gogins To: Richard Dobson , csound@maths.ex.ac.uk MMDF-Warning: Parse error in original version of preceding line at UK.AC.Bath.maths.omphalos Subject: Re: Linear Prediction in Csound Date: Tue, 16 Mar 1999 20:06:00 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3110.3 Sender: owner-csound-outgoing@maths.ex.ac.uk Precedence: bulk The XML format is, by definition, extensible and is, with careful naming of tags, to a certain degree self-documenting. If Microsoft has created an extensible WAV chunk system that does not require pre-registration, then that is a big plus that should be seriously considered. Could you briefly explain how it works? Most XML and XML like language is not actually edited much by hand. HTML is a good example. VRML is another. But it invariably turns out to be extremely handy to be able to edit it by hand (fix broken files, quickly touch something up, etc.). -----Original Message----- From: Richard Dobson To: csound@maths.ex.ac.uk Date: Tuesday, March 16, 1999 4:36 PM Subject: Re: Linear Prediction in Csound >Well, I will certainly look at an XML representation of pvoc analysis >files with interest, but the main advantages for me of a binary format >are streamability (as for ordinary soundfiles), and flexibility in >defining multifarious pvoc formats (different analysis rates, decimation >factors, window sizes, etc). The binary format will also be smaller than >the text equivalent, by at least a factor of two - assuming that six >decimal places plus the point are used for each value, and one tab, and >one newline (two bytes on disk for DOS). If ad-lib white-space is used, >the file-size will grow accordingly. > >At the moment, the Microsoft WAVE-EX format looks extremely attractive, >as it is by definition streamable, and allows new sub-formats to be >defined without the need to register them with Microsoft. One goal I >have is a 'multi-channel' pvoc format (eg for stereo streams and above), >and chaining of frequency-domain processes in real-time as in >DirectShow. > >The analogy of editing pvoc files in the way one can edit a single >time-domain sample does not quite hold, as in a pvoc stream of >overlapping frames, several frames will need to be edited together. The >potential for corruption of the format through manual editing and >cut+paste must be very high. The text format will certainly have value >for many purposes, but I cannot see it other than as supplementary to a >main binary format. > >BTW: Martin Puryear has just posted a new version of the Microsoft >WAVE-EX document, and I will send it to my website immediately. It looks >as if the main format is now fixed, as the document concludes by saying >that the format 'can be supported today'. > > >Richard Dobson > >Michael Gogins wrote: > >> >> I have used a hybrid XML format in which the tags and some data is text, but >> other data is length-prefixed binary. This, for example, forms the >> element of the Csound structured data file (csd file), which I >> created. But I think the advantages of using binary format for the columns >> of a time/frequency analysis, as opposed to a text printout of the vector, >> are slight. >> > > >-- >Test your DAW with my Soundcard Attrition Page! >http://wkweb5.cableinet.co.uk/rwd >CDP homepage: http://www.bath.ac.uk/~masjpf/CDP/CDP.htm Received: from shaun.maths.bath.ac.uk by omphalos.maths.Bath.AC.UK id aa14097; 17 Mar 99 3:19 GMT Received: from [144.173.6.14] (helo=exeter.ac.uk) by shaun.maths.bath.ac.uk with esmtp (Exim 1.92 #2) for jpff@maths.bath.ac.uk id 10N6rI-00039Z-00; Wed, 17 Mar 1999 03:19:04 +0000 Received: from noether [144.173.8.10] by hermes via SMTP (DAA14870); Wed, 17 Mar 1999 03:17:36 GMT Received: from exeter.ac.uk by maths.ex.ac.uk; Wed, 17 Mar 1999 03:17:25 GMT Received: from mtiwmhc04.worldnet.att.net [204.127.131.39] by hermes via ESMTP (DAA12441); Wed, 17 Mar 1999 03:17:24 GMT Received: from att.net ([12.72.103.243]) by mtiwmhc04.worldnet.att.net (InterMail v03.02.07 118 124) with ESMTP id <19990317031643.FQES19480@att.net> for ; Wed, 17 Mar 1999 03:16:43 +0000 Message-ID: <36EF2187.19B4D642@att.net> Date: Tue, 16 Mar 1999 19:29:18 -0800 From: SONICMAN X-Mailer: Mozilla 4.5 (Macintosh; U; PPC) X-Accept-Language: en MIME-Version: 1.0 To: Csound Q&A list Subject: Okay, now your fav' MATH books survey! Content-Type: text/plain; charset=iso-8859-1; x-mac-type="54455854"; x-mac-creator="4D4F5353" Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by exeter.ac.uk id DAA12441 Sender: owner-csound-outgoing@maths.ex.ac.uk Precedence: bulk Hello, I got some great suggestions regaurding DSP/audio code books, and because Csound has gotten me so inspired my interest in everything mathmatical has gone haywire! I want to know everything I can about the full depth of mathmatics but honestly I will need a really "GREAT" book that was written with an emphasis on learning not on the writer trying to show how brainy he is. I'm sure you all know what I'm talking about there. I once read 2 or 3 books on one subject still not understanding it, until I hapt across a ONE paragraph explanation in a magazine article and it was crystal clear. It is not WHAT is said but HOW it is said! So if y'all know of some powerful math books that could help a begginer mathmatician "LEARN" ...yes folks I actually want to learn, Please refer them to me! Your friend and future master of "Biotechmolecular Synthesis", =A91999 sonicman studios, SONICMAN! Received: from shaun.maths.bath.ac.uk by omphalos.maths.Bath.AC.UK id aa14117; 17 Mar 99 3:21 GMT Received: from [144.173.6.14] (helo=exeter.ac.uk) by shaun.maths.bath.ac.uk with esmtp (Exim 1.92 #2) for jpff@maths.bath.ac.uk id 10N6tk-00039l-00; Wed, 17 Mar 1999 03:21:36 +0000 Received: from noether [144.173.8.10] by hermes via SMTP (DAA07748); Wed, 17 Mar 1999 03:19:03 GMT Received: from exeter.ac.uk by maths.ex.ac.uk; Wed, 17 Mar 1999 03:18:52 GMT Received: from mtiwmhc04.worldnet.att.net [204.127.131.39] by hermes via ESMTP (DAA14834); Wed, 17 Mar 1999 03:18:49 GMT Received: from att.net ([12.72.103.243]) by mtiwmhc04.worldnet.att.net (InterMail v03.02.07 118 124) with ESMTP id <19990317031819.FQZY19480@att.net> for ; Wed, 17 Mar 1999 03:18:19 +0000 Message-ID: <36EF21E7.EE0279A5@att.net> Date: Tue, 16 Mar 1999 19:30:54 -0800 From: SONICMAN X-Mailer: Mozilla 4.5 (Macintosh; U; PPC) X-Accept-Language: en MIME-Version: 1.0 To: Csound Q&A list Subject: THANKS, to all the DSP book survey responses Content-Type: text/plain; charset=us-ascii; x-mac-type="54455854"; x-mac-creator="4D4F5353" Content-Transfer-Encoding: 7bit Sender: owner-csound-outgoing@maths.ex.ac.uk Precedence: bulk Just thought I'd let you all know I appreciate your help. I am obsessed with the goal of total DSP mastery! Thanks, SONICMAN=out Received: from wallace.maths.bath.ac.uk by omphalos.maths.Bath.AC.UK id aa14268; 17 Mar 99 4:46 GMT Received: from [144.173.6.14] (helo=exeter.ac.uk) by wallace.maths.bath.ac.uk with esmtp (Exim 1.92 #2) for jpff@maths.bath.ac.uk id 10N8DW-0006Np-00; Wed, 17 Mar 1999 04:46:06 +0000 Received: from noether [144.173.8.10] by hermes via SMTP (EAA11339); Wed, 17 Mar 1999 04:41:26 GMT Received: from exeter.ac.uk by maths.ex.ac.uk; Wed, 17 Mar 1999 04:41:18 GMT Received: from ccrma.Stanford.EDU [36.49.0.84] by hermes via ESMTP (EAA14805); Wed, 17 Mar 1999 04:41:17 GMT Received: from ccrma.stanford.edu ([207.97.74.44]) by ccrma.stanford.edu (8.8.8/8.8.8) with ESMTP id UAA15506; Tue, 16 Mar 1999 20:41:07 -0800 (PST) Message-ID: <36EF3107.47B50133@ccrma.stanford.edu> Date: Tue, 16 Mar 1999 23:35:19 -0500 From: Tobias Kunze X-Mailer: Mozilla 4.05 [en] (X11; I; IRIX 6.5 IP22) MIME-Version: 1.0 To: SONICMAN CC: Csound Q&A list Subject: Re: Okay, now your fav' MATH books survey! References: <36EF2187.19B4D642@att.net> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-csound-outgoing@maths.ex.ac.uk Precedence: bulk > It is not WHAT is said but HOW it is said! yeah, but that's different for everyone! I guess you will find that the read-one-book-and-get-it-all approach does never work. If you are serious about "total DSP mastery", you need to start with one, then cross-check with others. Problem with DSP is that it is heavily based on two unfortunately arcane fields: complex variables and the Fourier transform. Thus, and depending on where you stand, you probably need to allott three to six months to get a grasp of it. A good place to start is Ken Steiglitz: "A DSP Primer: With Applications to Digital Audio and Computer Music," Addison-Wesley, 1996, 314 pp. and several papers about DSP in the Computer Music Journal by Julius Smith, David Jaffe and especially the * Two-part tutorial on the "Mathematics of signal processing" by Andrew Moorer (also in: John Strawn, ed., Digital Audio Signal Processing: An Anthology, Los Altos, CA: W. Kaufmann, 1985.) Finally, you will need a good reference text. That would be either the classic "Oppenheim-Schafer": * A. V. Oppenheim and R. W. Schafer, Discrete-Time Signal Processing. Englewood Cliffs, NJ: Prentice Hall, 1989 or the newer * Sophocles J. Orfanidis: Introduction to Signal Processing, Prentice Hall. 1995. (798 pp., hardcover, $88) But check for instance http://shoko.calarts.edu/~glmrboy/musicdsp/dspbooks.html for other choices. -Tobias Received: from shaun.maths.bath.ac.uk by omphalos.maths.Bath.AC.UK id aa14678; 17 Mar 99 7:12 GMT Received: from [144.173.6.14] (helo=exeter.ac.uk) by shaun.maths.bath.ac.uk with esmtp (Exim 1.92 #2) for jpff@maths.bath.ac.uk id 10NAVb-0003Gp-00; Wed, 17 Mar 1999 07:12:55 +0000 Received: from noether [144.173.8.10] by hermes via SMTP (HAA01036); Wed, 17 Mar 1999 07:11:35 GMT Received: from exeter.ac.uk by maths.ex.ac.uk; Wed, 17 Mar 1999 07:11:23 GMT Received: from root@proxy4.ba.best.com [206.184.139.15] by hermes via ESMTP (HAA18216); Wed, 17 Mar 1999 07:11:21 GMT Received: from charlieb.com (baker.vip.best.com [206.86.232.121]) by proxy4.ba.best.com (8.9.3/8.9.2/best.out) with ESMTP id XAA26441; Tue, 16 Mar 1999 23:09:00 -0800 (PST) Message-ID: <36EF54F3.B7ECCA82@charlieb.com> Date: Tue, 16 Mar 1999 23:08:50 -0800 From: Charles Baker Reply-To: baker@charlieb.com X-Mailer: Mozilla 4.5 (Macintosh; U; PPC) X-Accept-Language: en MIME-Version: 1.0 To: Tobias Kunze CC: SONICMAN , Csound Q&A list Subject: Re: Okay, now your fav' MATH books survey! References: <36EF2187.19B4D642@att.net> <36EF3107.47B50133@ccrma.stanford.edu> Content-Type: text/plain; charset=us-ascii; x-mac-type="54455854"; x-mac-creator="4D4F5353" Content-Transfer-Encoding: 7bit Sender: owner-csound-outgoing@maths.ex.ac.uk Precedence: bulk Tobias Kunze (very correctly) recommends this old publication: > > * Two-part tutorial on the "Mathematics of signal processing" > by Andrew Moorer (also in: John Strawn, ed., Digital Audio > Signal Processing: An Anthology, Los Altos, CA: W. Kaufmann, > 1985.) > but I gotta point out the article in question was by F. Richard Moore, who also has good intro to computer music(heavy in c code examples) in "Elements of Computer Music" Prentice-Hall 1990 I personally found Dick Moore's "Mathematics of signal processing" article and especially also the Julius O. Smith Digital Filter theory article that follows in that book to be key in developing what understanding I have of D.S.P.. ( my main background was as a performing classical musician and composer who used software synthesis languages ) If (as has been said on this list ) this book is out of print, it is a shame. I have a copy of the book....does anyone have a copy of the book and a scanner? () ;-) That same series has just published a "Fundamentals of Digital Audio" from Alan Kefauver, who teaches recording arts at Pebody Institute of Johns Hopkins...it is a short intro (not to DSP) but to the fundamental mechanics of digital audio ...it is remarkable mainly in the extent to which it avoids and simplfies the math involved... We should all contact AR Editions of Madison WI (which took over the W. Kaufman series a while back) and ask that the early volume with Moore & Julius' article be reprinted ! It truely is a classic text of computer music, IMHO...check it out , oh, those who can (libraries are good places to start, maybe?) Pax, CharlieB Received: from shaun.maths.bath.ac.uk by omphalos.maths.Bath.AC.UK id aa14688; 17 Mar 99 7:17 GMT Received: from [144.173.6.14] (helo=exeter.ac.uk) by shaun.maths.bath.ac.uk with esmtp (Exim 1.92 #2) for jpff@maths.bath.ac.uk id 10NAaK-0003H0-00; Wed, 17 Mar 1999 07:17:48 +0000 Received: from noether [144.173.8.10] by hermes via SMTP (HAA03820); Wed, 17 Mar 1999 07:15:11 GMT Received: from exeter.ac.uk by maths.ex.ac.uk; Wed, 17 Mar 1999 07:15:03 GMT Received: from bbnrel4.hp.com [155.208.254.68] by hermes via ESMTP (HAA03387); Wed, 17 Mar 1999 07:14:58 GMT Received: from bstde026.bbn.hp.com (bstde026.bbn.hp.com [15.136.78.25]) by bbnrel4.hp.com (8.8.6/8.8.5tis) with ESMTP id IAA28628 for ; Wed, 17 Mar 1999 08:14:53 +0100 (MET) Received: by bstde026.bbn.hp.com (1.39.111.2/16.2+BAMS 4.0 ISO+4.1) id AA189944777; Wed, 17 Mar 1999 08:12:57 +0100 Message-Id: <199903170712.AA189944777@bstde026.bbn.hp.com> Subject: Re: Csound Performance on Multiprocessor Intel Systems? To: csound@maths.ex.ac.uk Date: Wed, 17 Mar 1999 8:12:57 MET In-Reply-To: <36ED13C5.DA337F1B@cygnus.com>; from "Thomas Hudson" at Mar 15, 99 2:05 pm Organization: Hewlett-Packard GmbH From: Jens Kilian Reply-To: Jens_Kilian@bbn.hp.com X-Mailer: Elm [revision: 212.4] Sender: owner-csound-outgoing@maths.ex.ac.uk Precedence: bulk > My 300mHz Celeron has been running continuously at 464mHz for over two > months. I had to bump the core voltage to 2.3 and use a heat sink with > three cooling fans. > > I think what you are saying used to be true. Today however, marketing > probably plays a greater role. I'm sure Intel doesn't want an $80 > Celeron competing with the much more expensive and profitable > Pentium II 450. I've been told that there is no official higher-speed version of the Celeron, so this may be true; I've no idea. However, if there IS a higher rated model of the same processor line, my original remark will apply (the lower-speed chips are those that have failed a "speed binning" test). Good luck, Jens. -- mailto:jjk@acm.org phone:+49-7031-14-7698 (HP TELNET 778-7698) http://www.bawue.de/~jjk/ fax:+49-7031-14-7351 PGP: 06 04 1C 35 7B DC 1F 26 As the air to a bird, or the sea to a fish, 0x555DA8B5 BB A2 F0 66 77 75 E1 08 so is contempt to the contemptible. [Blake] Received: from shaun.maths.bath.ac.uk by omphalos.maths.Bath.AC.UK id aa15237; 17 Mar 99 11:09 GMT Received: from [144.173.6.14] (helo=exeter.ac.uk) by shaun.maths.bath.ac.uk with esmtp (Exim 1.92 #2) for jpff@maths.bath.ac.uk id 10NECn-0003U2-00; Wed, 17 Mar 1999 11:09:45 +0000 Received: from noether [144.173.8.10] by hermes via SMTP (KAA08472); Wed, 17 Mar 1999 10:52:00 GMT Received: from exeter.ac.uk by maths.ex.ac.uk; Wed, 17 Mar 1999 10:51:45 GMT Received: from law-f213.hotmail.com [209.185.130.123] by hermes via SMTP (KAA11208); Wed, 17 Mar 1999 10:51:44 GMT Received: (qmail 2262 invoked by uid 65534); 17 Mar 1999 10:50:58 -0000 Message-ID: <19990317105058.2261.qmail@hotmail.com> Received: from 195.120.105.5 by www.hotmail.com with HTTP; Wed, 17 Mar 1999 02:50:58 PST X-Originating-IP: [195.120.105.5] From: Alessandro Andreuccetti To: csound@maths.ex.ac.uk Subject: looking for italian csound users Date: Wed, 17 Mar 1999 02:50:58 PST Mime-Version: 1.0 Content-type: text/plain Sender: owner-csound-outgoing@maths.ex.ac.uk Precedence: bulk as in subject I'm looking for csound italian users. 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