Category: DSP

Posted on

Piping raw IQ data from rtl-sdr to Max

notes

Here is a discussion about mkfifo (pipes) but  I can’t seem to get Max to interpret the FIFO as audio samples

http://www.reddit.com/r/RTLSDR/comments/rd15f/some_noob_questions_after_succesfully_getting/

I think I know how to figure out the streaming IQ thing now. Capture samples to a file, then look at the format. Then maybe pipe the file through something like auconvert to make it into a wave file. If that works, then maybe there is a way to to it as streaming.

Or figure out how to stream from tcp/ip version to audio.

Posted on

rtl-sdr commands for testing

Had to install play (from sox) in /usr/bin

Gqrx came with the rtl command set – you can run the commands from

/Applications/Gqrx.app/Contents/Macos/

This command tunes to FM broadcast and plays

./rtl_fm -f 90100000 -W -s 200000 -r 48000 - | play -r48000 -t s16 -L -c 1 -