[EMAIL PROTECTED] wrote:
>
> When Clay Voris wrote,
>
> V> Personally, I like the "back-to-back" shuffle play better; too bad they
> V> don't let you change the way it works in the setup menu.
>
> Simon Mackay responded,
>
> M> What a good idea! Provide an option in the unit's "Setup" menu to allow
> M> users to select this kind of behaviour -- "Seamless Shuffle" and values are
> M> "On" or "Off".
>
> It's hard to imagine why anyone would turn it off! Besides, on a deck with
> Auto-Space, anyone who wanted silences between tracks in shuffle play could
> use Auto-Space to insert them and wouldn't need a way to turn segueing off.
>
> M> If the unit is a CD-MiniDisc combination unit of the kind that JVC makes,
> M> the buffer would work on the PCM audio, rather than the raw MiniDisc audio.
>
> Somehow I've always had the impression that the buffers already hold PCM or
> S/PDIF, not ATRAC. That wouldn't make sense, though, because more compressed
> audio than uncompressed audio could fit in the same amount of memory. Thanks
> for the impetus to rethink that, Simon. (Makes me wonder how I got that idea
> in the first place; it has to be wrong.)
>
Hmm, let's do a little calculation:
44k1 * 16 * 10 * 2 = 14 Mbit....
(44.1 khz * 16 bits * 10 seconds * stereo );
To my knowledge, a 4Mbit RAM is used for most machines with a 10 seconds buffer.
I think the ATRAC data is stored in the memory since:
1) 14Mbit/5 equals 2.8 Mbits of ATRACed data. The closest match for
^ ^- compression of ATRAC! a memory chip is 4 Mbit
\ 44k1 * 16 * 10 * 2 = 14 Mbit.
2) Using a 4Mbits of memory is cheaper than using a 16Mbits memory.
3) The use of a 16Mbits memory resulted in a 40seconds memory buffer!
Cheers,
Ralph -> storing everything in a compressed format.....
--
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Ralph Smeets Functional Verification Centre Of Competence - CMG
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"For many years, mankind lived just like the animals. And then some-
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to talk."
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