Return-Path: Received: (qmail 97364 invoked from network); 12 Dec 2003 01:50:03 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by ptb-mailstore with SMTP; 12 Dec 2003 01:50:03 -0000 Received: (qmail 11040 invoked from network); 12 Dec 2003 01:50:03 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 12 Dec 2003 01:49:57 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AUcQW-0005RT-MU for rs_out@blacksheep.org; Fri, 12 Dec 2003 01:49:08 +0000 Received: from [64.12.136.4] (helo=imo-m01.mx.aol.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AUcQV-0005RE-Pm for rsgb_lf_group@blacksheep.org; Fri, 12 Dec 2003 01:49:07 +0000 X-Fake-Domain: G0MRF@aol.com Received: from G0MRF@aol.com by imo-m01.mx.aol.com (mail_out_v36_r1.1.) id l.28.41604b50 (4206) for ; Thu, 11 Dec 2003 20:48:32 -0500 (EST) From: G0MRF@aol.com Message-ID: <28.41604b50.2d0a7870@aol.com> Date: Thu, 11 Dec 2003 20:48:32 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 8.0 for Windows sub 670 Subject: LF: Soundcard bandpass filter? Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_MESSAGE,NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Content-transfer-encoding: 8bit Hello group.

Does anyone know of a programme that can produce an audio bandpass filter from a soundcard?

I'm trying to find something that will allow me to specify a frequency of interest and to have the DSP remove signals above and below two cut-off frequencies.

Reason: twofold, 1) I've recently recorded some EME signals from 70cms as .wav files and I'm trying to recover reasonable audio.
2) It occurs to me that the LF QRSS beacons regularly visible from VO/RU/ etc. are actually very strong and it should be possible to filter and speed up  a stored QRSS file to something like normal CW........just for fun

Would the new 'filter' incorporated into  V2.3 spectrum Lab do this?

Seasons greetings es 73

David   G0MRF