Converting wav file for wspr tx

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Converting wav file for wspr tx


I am experimenting with wspr and my raspberry pi. I am getting decodes between my two radios by transmitting a wav file using rpitx.

The problem I am trying to solve is the WAV to SSB to IQ file convertor in rpitx is designed for voice and has a low pass filter of about 2.5kHz.

Does anyone know how to create a more suitable IQ file from a wav recording as I understand wspr signals have a bandwidth more like 6Hz?