On 9 February 2012 15:01, Antti Palosaari <crope@xxxxxx> wrote: > Decode it and listen some Finnish speak ;) Done. grc and output.wav here: http://al.robotfuzz.com/~al/rtl2832/ The trick was realising that the UChar to Float converter does not adjust it's output to the range -1.0,1.0 that the wideband FM demodulator block expects as input. Once I figured that out the rest was easy. Just set the quadrature rate to the samples per second in the source file, and the decimation to quadrature rate/output sink rate. 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. -- Alistair Buxton a.j.buxton@xxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
