Hi Rob, Sorry if my original message was confusing. What I meant was I need a external audio DSP that will cover up to 5khz. I have not used one and not sure if they will cover more than the usual 3 from a ham rig. I need this for a work application where I need from approximately 100 Hz to 5KHz. I need it to be able to roll off above that. Does that make it clearer? Dave VA3DAC ----- Original Message ----- From: Valveman To: karc@xxxxxxxxxxxxx Sent: Monday, March 22, 2010 6:13 PM Subject: [karc] Re: Audio DSP Dave are you talking about an external DSP for receiving? Why would you want a DSP to cover 3-5Khz? It defeats the purpose of a filter. What am I missing here? Robert Parker VE3RPF ------------------------------------------------------------------------------ From: Dave Casement <va3dac@xxxxxxxxx> To: karc@xxxxxxxxxxxxx Sent: Mon, March 22, 2010 5:28:48 PM Subject: [karc] Audio DSP Hi, Does anyone know of a model of audio DSP that puts out a bandwidth of more than 3 KHz. I need 5 if that is possible. Maybe they all do more than 3. Thanks Dave VA3DAC ------------------------------------------------------------------------------ Make your browsing faster, safer, and easier with the new Internet Explorer® 8. Optimized for Yahoo! Get it Now for Free! ------------------------------------------------------------------------------ No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.791 / Virus Database: 271.1.1/2765 - Release Date: 03/23/10 03:33:00