Another fairly cheap option is to modify your BCT15X (I read your other post
)
What you would do is to add a wire to the circuit board to a point marked DISC, (for Discriminator) from that wire a resistor would be soldered to it. The resistor would be soldered to an audio jack. You would run a mono audio cable from there to your computer. Install a DSD+ software program. With the frequency programmed into the 15X you could run that audio through DSD+ and listen through the audio from your computer.
If you have a Sayal Electronics within a reasonable drive you could pick up the parts needed for around $10-20.(That is a local reference for the original poster as I see that Americans are also participating in the thread)
You may have spare wire or audio cable lying around. The software is free.