Seth,
 
Any text mode using tones you should be able to tune with your ear and use
whatever text to braile device you can use.
 
RTTY is a good starting point then move from there.
 
Monitoring RTTY is to my mind a good idea. If you feel mixed characters is
because RTTY is straight out with no error corrections.
 
To decode the tones have to be high pitched, around 2300 hz
 
73,
Alan
VY2XU 

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