source file: mills3.txt Date: Fri, 10 Oct 1997 20:10:25 +0200 Subject: Re: dynamic JI From: Manuel.Op.de.Coul@ezh.nl > Interesting. I came up with "decent" key recognition algorithm nearly a > year ago based upon ... well, oversimplifying it a bit ... tallying up a > histogram of note frequency on a circle of fifths. The advantage of a connectionist network model is that you only need a few input tones to get a reasonable response. The different activation levels of the key units is what indicates the key. So if C has the highest activation then F and G come next to that as in the circle of fifths. The network consists of layers with nodes for tones, major chords, minor chords and keys. The links have a weight and are symmetrical. An interesting conclusion of the article by Barucha is that even though the weight of the links between source chord C major and its parent keys F, C and G are equal, the parent keys are not activated to the same degree. It is in decreasing order: C, F, G which are the keys in which the chord is on the tonic, dominant and subdominant. This in accordance with the hierarchy of harmonic functions in music theory. Manuel Op de Coul coul@ezh.nl SMTPOriginator: tuning@eartha.mills.edu From: John Starrett Subject: Re: Guitar refretting PostedDate: 10-10-97 23:39:15 SendTo: CN=coul1358/OU=AT/O=EZH ReplyTo: tuning@eartha.mills.edu $MessageStorage: 0 $UpdatedBy: CN=notesrv2/OU=Server/O=EZH,CN=coul1358/OU=AT/O=EZH,CN=Manuel op de Coul/OU=AT/O=EZH RouteServers: CN=notesrv2/OU=Server/O=EZH,CN=notesrv1/OU=Server/O=EZH RouteTimes: 10-10-97 23:38:49-10-10-97 23:38:50,10-10-97 23:39:18-10-10-97 23:39:19 DeliveredDate: 10-10-97 23:39:19 Categories: $Revisions: Received: from ns.ezh.nl ([137.174.112.59]) by notesrv2.ezh.nl (Lotus SMTP MTA SMTP v4.6 (462.2 9-3-1997)) with SMTP id C125652C.0076E537; Fri, 10 Oct 1997 23:38:39 +0200 Received: by ns.ezh.nl; (5.65v3.2/1.3/10May95) id AA13555; Fri, 10 Oct 1997 23:39:15 +0200 Date: Fri, 10 Oct 1997 23:39:15 +0200 Received: from ella.mills.edu by ns (smtpxd); id XA13551 Received: (qmail 28181 invoked from network); 10 Oct 1997 14:39:07 -0700 Received: from localhost (HELO ella.mills.edu) (127.0.0.1) by localhost with SMTP; 10 Oct 1997 14:39:07 -0700 Message-Id: Errors-To: madole@mills.edu Reply-To: tuning@eartha.mills.edu Originator: tuning@eartha.mills.edu Sender: tuning@eartha.mills.edu