https://www.rtl-sdr.com/rtl-sdr-retrogram-ascii-art-spectrum-analyzer/
RTL-SDR Retrogram: ASCII Art Spectrum Analyzer
Dec 14, 2018 - Over on GitHub, Rakesh Peter (r4d10n) has uploaded a new terminal/ssh based console application called 'retrogram~rtlsdr'. This program uses an RTL-SDR and...
ascii artspectrum analyzerrtlsdrretrogram
https://retrogram.app/
Retrogram
A simple word game from the 1970s
retrogram