[Discuss-gnuradio] Waveform after AM demodulation looks weird

[Anton Komarov]

Hi, you can find in attach AM demodulator grc file. Everything is straight forward with demod but audio file generated looks weird. Only positive values of amplitude. In FFT i do see symmetric picture. I enabled/disabled DC offset option in osmosdr block, but it did not help. 

Originally file is generated as raw audio and after processed with sox (-t raw -r 16k -b 16 -e signed-integer). I have also tried to use wav sink block - the same result.

Find wav file in attach.

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public PGP key

http://pastebin.com/dqZqgyVE

grc_airband.grc.png
Description: PNG image

126000000.0_2014_04_25-16.wav
Description: Wave audio