[GreenKeys] FSK Audio files for Test and Evaluation

[Harold Hallikainen]

They work great! I tested the 45 baud 170 Hz and 850 Hz shift. Both
printed perfectly.

I also ran one of the files through
https://www.maztr.com/audiofileanalyzer and find that you are doing 8
ksps, 16 bits per sample, and through MP3 compression, sending at 20.2
kbps.

Very nice! My New York Time feed ( https://w6iwi.org/rtty/audio/nyt/ )
also runs at 8 ksps but with 8 bit samples and no compression for 64 kbps.

Harold


On Thu, May 1, 2025 11:43 am, John Spigel wrote:
> From software I'm creating I've put together a couple of FSK audio
> files for outside evaluation of audio and decode quality. The tones
> themselves are generated in python. These are large 60M mp3 files. If
> able, please open, test and let me know if they are good to go or need
> some further filtering. I also may be able to compact further. Audacity
> says the noise is about 60db down, but that's not what the real world may
> see. There is both 170 and 850 cps shift. Thanks! And I'll have more of
> these soon.
>
> https://5bits.net
>
>
> 73, John W1AN
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