source file: mills2.txt Date: Tue, 20 May 1997 16:04:27 +0200 Subject: RE: pure? / synth tuning From: PErlich David wrote, >I use a table in a Word Perfect for Windows doc to do the calculations for me >on each scale. WP doesn't do log-base2, only base ten or natural logs, but I >found that multiplying any base10 log by 3986.313713865... will produce the >corresponding base 2 log. Oh, goody. So here is the line from my Formula >Bar for line 2 of the table, which calculates C# (or as I like to call it, >2b): >-3986.313713865*LOG(C2/B2) [. . .] Well, this last number converts from base ten to base two, and then multiplies by 1200 to convert from octaves to cents. So this number is simply log(10)/log(2)*1200 where the logs can be to any base, so you can use base-ten logs if that's all Word Perfect can handle. Received: from ns.ezh.nl [137.174.112.59] by vbv40.ezh.nl with SMTP-OpenVMS via TCP/IP; Tue, 20 May 1997 19:01 +0200 Received: by ns.ezh.nl; (5.65v3.2/1.3/10May95) id AA06187; Tue, 20 May 1997 19:01:50 +0200 Date: Tue, 20 May 1997 19:01:50 +0200 Message-Id: <9705201701.AA06187@ns.ezh.nl> Received: from ella.mills.edu by ns (smtpxd); id XA06291 Received: (qmail 18095 invoked from network); 20 May 1997 17:01:45 -0000 Received: from localhost (HELO ella.mills.edu) (127.0.0.1) by localhost with SMTP; 20 May 1997 17:01:45 -0000 Errors-To: madole@mills.edu Reply-To: tuning@eartha.mills.edu Originator: tuning@eartha.mills.edu Sender: tuning@eartha.mills.edu