gistfile1.txt

pi@picluster1 ~/superham $ ruby demod-raw.rb iq.dat
Reading file iq.dat...
Read 5100000 data points from file.
6:1 low pass filter...
Now 850000 samples.
FM demodulator...
Deemph filter...
Reducing low pass real filter...
Now 160000 samples.
Playing 160000 data points.
demod-raw.rb:205:in `[]': invalid memory read at address=0x000000 (FFI::NullPointerError)
	from demod-raw.rb:205:in `init!'
	from demod-raw.rb:193:in `initialize'
	from demod-raw.rb:231:in `new'
	from demod-raw.rb:231:in `play'
	from demod-raw.rb:235:in `<main>'