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edy555/rtlsdr-wbfm-stereo.lua

Created December 3, 2016 01:01
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rtlsdr-wbfm-stereo.lua
local radio = require('radio')
radio.CompositeBlock():connect(
radio.RtlSdrSource(88.5e6 - 250e3, 1102500), -- RTL-SDR source, offset-tuned to 88.5 MHz - 250 kHz
radio.TunerBlock(-250e3, 200e3, 5), -- Translate -250 kHz, filter 200 kHz, decimate 5
radio.FrequencyDiscriminatorBlock(1.25), -- Frequency demodulate with 1.25 modulation index
radio.LowpassFilterBlock(128, 15e3), -- Low-pass filter 15 kHz for L+R audio
radio.FMDeemphasisFilterBlock(75e-6), -- FM de-emphasis filter with 75 uS time constant
radio.DownsamplerBlock(5), -- Downsample by 5
radio.PulseAudioSink(1) -- Play to system audio with PulseAudio
):run()
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