Raspberry PI - rpitx

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Raspberry PI - rpitx


I'm experimenting with transmitting a wav file using rpitx on my old raspberry pi. I am getting good wspr decodes between my shack and my house.

The program used to convert my wspr wav file to ssb is optimised for voice with a low pass filter of approximately 2.5KHZ.

What would be a better low pass filter for wspr as I'm aware 2.5KHZ is massive for wspr? Once I know this I'll work on generating a better ssb wav file.

Many thanks,