From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mailout-de.gmx.net ([213.165.64.23]:58975 "HELO mailout-de.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1753199Ab2BKLdu (ORCPT ); Sat, 11 Feb 2012 06:33:50 -0500 Date: Sat, 11 Feb 2012 12:33:47 +0100 From: Daniel =?iso-8859-1?Q?Gl=F6ckner?= To: Alistair Buxton Cc: Antti Palosaari , linux-media Subject: Re: SDR FM demodulation Message-ID: <20120211113347.GA22110@minime.bse> References: <4F33DFB8.4080702@iki.fi> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-media-owner@vger.kernel.org List-ID: On Sat, Feb 11, 2012 at 07:00:16AM +0000, Alistair Buxton wrote: > The source file appears to be about 2 to 2.2 million samples per > second. Any higher than that and the person speaking sounds like a > chipmunk. Maybe 22050 * 1000 or 1024? Does any Finnish station > broadcast "pips" like the BBC does? That could be used to determine > the actual rate. The stereo carrier is at 19kHz and RDS is centered around 57kHz. I'd say this is 2048kHz sampling rate. Daniel