Added more data. Not sure what to make of any of it.
Attempted to debug the receiver.
APRS packets sent and logged at aprs.fi using the Cory roof antenna are not properly decoded when recorded with the Baofeng radio and sound card or using the SDR through GQRX.
The GQRX afsk1200 decoder does not decode these packets either.
The audio signal corresponding to the packets can be heard and seen on a spectrogram.
All signals were generated and recorded at 48 KHz.

data/test_aprs[0-9].wav contain aprs packet recordings from the SDR. All of these recordings were received and logged at aprs.fi
chirp datasets included for trying to determine what happens in the system.