Return-Path: Received: (qmail 12159 invoked from network); 12 Nov 2001 16:36:57 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 12 Nov 2001 16:36:57 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 17448 invoked from network); 12 Nov 2001 16:37:03 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 12 Nov 2001 16:37:03 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 163JwF-0000Mx-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 12 Nov 2001 16:27:59 +0000 Received: from [213.2.16.106] (helo=rsgb.org.uk) by post.thorcom.com with esmtp (Exim 3.33 #2) id 163JwE-0000Ms-00 for rsgb_lf_group@blacksheep.org; Mon, 12 Nov 2001 16:27:58 +0000 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v5.0.0.R) for ; Mon, 12 Nov 2001 16:18:21 +0000 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Mon, 12 Nov 2001 16:18:09 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: Computer as DSP audio filter Message-ID: <3BEFF641.19014.181C6C3@localhost> In-reply-to: <005701c16b80$f8cf36c0$4d89153e@w8k3f0> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > I have been told there exists a computer program that not only presents received > signals as a waterfall display but can also make one of the signals being heard > as audio via the computer speakers. In that way the computer can act as a DSP > audio filter, perhaps even for normal speed CW provided an appropriate bandwidth > is selected. Anyone know more about this program? > 73, Dick, PA0SE Dick, You probably mean the latest version of Spectran which has all of the usual waterfall stuff, plus a very easy to use CW filter. The frequency display shows the incoming signal, and also the edges of the filter which can be adjusted simply by left or right clicking the mouse. You can easily separate the wanted and interfering signal this way. Download it from http://www.qsl.net/padan/spectran.html Mike, G3XDV (IO91VT) http://www.lf.thersgb.net