Return-Path: Received: (qmail 11836 invoked from network); 12 Nov 2001 14:39:09 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 12 Nov 2001 14:39:09 -0000 Received: (qmail 11783 invoked from network); 12 Nov 2001 14:39:09 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 12 Nov 2001 14:39:09 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 163I8W-00005B-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 12 Nov 2001 14:32:32 +0000 Received: from mail2.globocabo.com.br ([200.231.181.97] helo=ntweb.globocabo.com.br) by post.thorcom.com with esmtp (Exim 3.33 #2) id 163I8U-000056-00 for rsgb_lf_group@blacksheep.org; Mon, 12 Nov 2001 14:32:31 +0000 Received: from spovdesi1625 (SPOVD-ESI-1625 [5.8.11.192]) by ntweb.globocabo.com.br with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2653.13) id WYHNXYHJ; Mon, 12 Nov 2001 12:25:22 -0300 Message-ID: <008101c16b86$c16cb080$c00b0805@globocabo.com.br> From: "PY3CRX PY2PLL" To: rsgb_lf_group@blacksheep.org References: <005701c16b80$f8cf36c0$4d89153e@w8k3f0> Subject: LF: Re: Computer as DSP audio filter Date: Mon, 12 Nov 2001 12:29:28 -0200 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit

Are you talking about the software published by DL4YHF (http://www.qsl.net/dl4yhf/ ) ? He did a waterfall/spectrum and a receiver from "DC" to 22.5KHz.

73
Marcus
PY3CRX/PY2PLL
S. B. do Campo - GG66rf
http://py.qsl.br
Active from "DC" to 24GHz

----- Original Message -----

From: Dick Rollema

To: LF-Group

Sent: Monday, November 12, 2001 11:48 AM

Subject: LF: Computer as DSP audio filter

Dear OM,

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