Nice work Joe and Domenico.  Thanks for linking the wav files,
I downloaded and reproduced the three decodes using the Linux
decoder to get exactly the same results.

I wanted to see if normalising for amplitude variation made
any difference with the LF signals.

It didn't, the background noise is very constant so there is
negligible normalisation effect.

> not bad for a message of 63 characters on LF sent in less
> than 30 minutes !

The 02:00 decode: -39.6dB in audio bandwidth, 2.3 characters
per minute, 62% of channel capacity.

Domenico, if you want to upload the unsuccessful wavs, I can
check them to see how far short of a decode they were.

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Paul Nicholson
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