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Vitaliy Kulchevych coolchevy at gmail.comThanks, realy -l 0 help me. Problem with correct frequency. Why it is not correct? When I set -f434500000 -> Tuned to 434753575 Hz -f100000000 -> Tuned to 100253575 Hz Can you explain this? How I can calculate right frequency? On Wed, Nov 14, 2012 at 11:39 PM, Adam Nielsen <a.nielsen at shikadi.net> wrote: >> I use rtl_fm, check any options, but I can't listen any good sound :( >> >> For example: rtl_fm -f 10000000 -s 44100 - | mplayer - -quiet >> -rawaudio rate=8000:bitrate=44100 -demuxer rawaudio > > > -s means you are setting the RF bandwidth to 44.1kHz. Maybe you meant -r to > set the output sampling rate to 44.1k? > > Either way your -rawaudio option is setting the input sampling rate to 8kHz, > so the audio is going to sound like it has been slowed down. > > You may want to add the "-l 0" option to rtl_fm to disable squelch while > you're testing, just to see whether you are getting any audio at all. If > the signal isn't that strong the default squelch value will cause you to > only hear silence. > > Cheers, > Adam. > -- live free or die;