keenerd / rtl-sdr-misc

A bucket of various work-in-progress rtl-sdr ideas.
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heatmap for a audio wav file #18

Closed pauledd closed 6 years ago

pauledd commented 6 years ago

Hi there this is not an issue but more a question. Is it somehow possible to analyse audio files previously recorded and feed heatmap.py with it, or is anyone aware how I could do this with other tools? (linux prefered )

Background is: I want to do a long record audio session my environment during night, 6 hours or so to a raw audio file and I would like to plot/heatmap that file like heatmap it does. The reason is there is some kind of annoying audible background hum at ~49Hz in my area and I want to analyse that further.

sm3ulc commented 6 years ago

Try sox ability to generate spectrogram.

// David

Den 8 dec. 2017 18:27 skrev "pauledd" notifications@github.com:

Hi there this is not an issue but more a question. Is it somehow possible to analyse audio files previously recorded and feed heatmap.py with it, or is anyone aware how I could do this with other tools? (linux prefered )

Background is: I want to do a long record audio session my environment during night, 6 hours or so to a raw audio file and I would like to plot/heatmap that file like heatmap it does. The reason is there is some kind of annoying audible background hum at ~49Hz in my area and I want to analyse that further.

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pauledd commented 6 years ago

Thank you,I'll try that. I also found "sonic-visualiser" for linux but that might not be perfect for big files...