Thanks guys, some good ideas there. I'd been thinking of modem chips,
and not having much luck - but 80's computer game sqwauks is a good
lead!

thanks

jon

On 21/01/07, enkitec@gmail.com <enkitec@gmail.com> wrote:
>
>         Look at:
>
>         http://www.cmlmicro.com/products/WData/FX469.htm
>
>         That will give you some ideas.
>
>
> On 21 Jan 2007 at 14:20, Richard Prosser wrote:
>
> > You could try Googling "Kansas City Standard" IIRC it was 1200 baud
> > onto cassette tape but is likely to be scalable with a higherf
> > bandwidth media,
> >
> > RP
> >
> > On 20/01/07, Wouter van Ooijen <wouter@voti.nl> wrote:
> > > > I need to store digital data on an audio soundtrack. Source data rate
> > > > is not higher than 4800 bps, bandwidth of audio soundtrack is 32 KHz.
> > >
> > > You have ample 'room' between the baudrate and the audio bandwidth, so a
> > > simple FSK modulation should do. IIRC 1200 baud tape (casette) recording
> > > used to be common, scale the frequencies up by a factor 4 and try that.
> > >
> > > Wouter van Ooijen
> > >
> > > -- -------------------------------------------
> > > Van Ooijen Technische Informatica: www.voti.nl
> > > consultancy, development, PICmicro products
> > > docent Hogeschool van Utrecht: www.voti.nl/hvu
> > >
> > >
> > > --
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