source file: mills2.txt Date: Wed, 23 Oct 1996 08:19:47 -0700 Subject: Re: E! From: "Ewan A. Macpherson" Tony Salinas <101610.3043@CompuServe.COM> wrote: >Dear Gary morrison and tuners > > Last 5th of October you put a list of retunable keyboards from McLaren >and said that the DX7 with E! board has a precission of 1024 steps/octave. > > I actually use it myself, and it has 4096 steps/octave, in other words >steps of 0.29 cents. While E! lets you set frequencies with a precision of 4096 steps/oct, in fact there are only 1024 realizable steps. The values you enter are rounded off. You can verify this by setting two keys to the same frequency and listening to the beats as you adjust the setting of one of them. One would want to take this quantization into account when trying to find the best parameter value to approximate a particular interval. In other words, calculating based on 4096 steps and then letting E! round off will not always give the best 1024-step equivalent. Ewan Macpherson | "Many more things Hearing Development Research Lab, Waisman Center | are known than University of Wisconsin - Madison | are true." http://www.waisman.wisc.edu/~macpherson/ | -J.F.(Window) Kaiser Received: from ns.ezh.nl [137.174.112.59] by vbv40.ezh.nl with SMTP-OpenVMS via TCP/IP; Wed, 23 Oct 1996 22:37 +0200 Received: by ns.ezh.nl; (5.65v3.2/1.3/10May95) id AA05256; Wed, 23 Oct 1996 22:39:42 +0200 Received: from eartha.mills.edu by ns (smtpxd); id XA10968 Received: from by eartha.mills.edu via SMTP (940816.SGI.8.6.9/930416.SGI) for id NAA05027; Wed, 23 Oct 1996 13:39:39 -0700 Date: Wed, 23 Oct 1996 13:39:39 -0700 Message-Id: Errors-To: madole@ella.mills.edu Reply-To: tuning@eartha.mills.edu Originator: tuning@eartha.mills.edu Sender: tuning@eartha.mills.edu