source file: mills3.txt Date: Thu, 18 Sep 1997 21:31:57 +0200 Subject: missing fundamental From: James Kukula There's a blurb on pg 22 of the 9/8 issue of Electronic Engineering Times, about a company Wave Ltd. that is using pycho-acoustic trickery to produce the illusion of deep bass sound out of small/cheap equipment. "...the algorithm identifies fundamental frequencies that are present, but that will not be reproduced by the speaker. It then synthesizes a set of harmonics - both odd and even - with just the right amplitude relationship to fool the ear into thinking it has heard the fundamental. These harmonic signals are then added into the audio stream. "'It is very important to get the harmonics to decay at just the right rate,' Shashoua said. 'Too fast, and you will not create the illusion. Too slow, and you will create a buzzing effect, like listening to a square wave.'" Jim SMTPOriginator: tuning@eartha.mills.edu From: gregs@mail.usyd.edu.au Subject: Re: Writing Csound from Scala1.3 PostedDate: 19-09-97 00:01:05 SendTo: CN=coul1358/OU=AT/O=EZH ReplyTo: tuning@eartha.mills.edu $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: 19-09-97 00:00:58-19-09-97 00:00:59,19-09-97 00:00:13-19-09-97 00:00:13 DeliveredDate: 19-09-97 00:00:13 Categories: $Revisions: Received: from ns.ezh.nl by notesrv2.ezh.nl (Lotus SMTP MTA v1.1 (385.6 5-6-1997)) with SMTP id C1256516.0078EC3D; Fri, 19 Sep 1997 00:00:48 +0200 Received: by ns.ezh.nl; (5.65v3.2/1.3/10May95) id AA07001; Fri, 19 Sep 1997 00:01:05 +0200 Date: Fri, 19 Sep 1997 00:01:05 +0200 Received: from ella.mills.edu by ns (smtpxd); id XA06988 Received: (qmail 22547 invoked from network); 18 Sep 1997 21:20:22 -0000 Received: from localhost (HELO ella.mills.edu) (127.0.0.1) by localhost with SMTP; 18 Sep 1997 21:20:22 -0000 Message-Id: Errors-To: madole@mills.edu Reply-To: tuning@eartha.mills.edu Originator: tuning@eartha.mills.edu Sender: tuning@eartha.mills.edu