Date   : Thu, 15 Feb 1996 09:35:59 +0100 (MET)
From   : Robert Schmidt <robert@...>
Subject: Re: Tape decoding status

> Could you also make a few blocks of samples available?. I do not
> have DOS/Windows and would like to write a program for Linux/unix.

By the way, my program is ANSI C, so it should compile and run on most 
architectures.  I forgot to bring the samples today - tomorrow maybe.  
I'll have to clean up the program a lot before I make it available.

Decoding is now quite fast, and seems to work fine with 22050 Hz samples 
too (but not 11025 Hz).  This morning I sampled one side at 44.1kHz (30 
minutes - 79 MB) of a worn C-60 tape with my old sources, and decoded all 
24 files in one go - only one CRC error!  I am starting to think about 
making this real-time, with live audio input, so that you can rewind the 
moment you get a CRC error to fix it - like on the Beeb.
 
> I wrote a encoder yesterday, which was extremely simple (with
> reversed freqencies :-). But i would also like to compare it
> with at real beeb's sound.

Does it produce output readable by a Beeb? That would be a nice utility 
for people to transfer data from their PCs to their Beeb!  Are you 
planning on making it a full utility and releasing it?  I'd be happy to 
put such a thing on my page, as one user has already asked me if I knew of 
such a program.


--
Robert Schmidt - robert@...         - http://www.idt.unit.no/~robert
	
	Maintainer of "The BBC lives!" page:  
	http://www.idt.unit.no/~robert/bbc/bbc.html