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96/24 signal processing


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Old 08-03-2008, 01:27
RobAnt
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Someone is trying to convince me that 96/24 signal processing (as used by DTS) is available in the analogue domain.

I am struggling to understand how that can be if 24=bits.

If I'm using an analogue output to a speaker set (in this case the Z-5400's by Logitech) into the 6 channels of direct analogue input.

Does anyone understand why it would be telling me that 96/24 is available? Is it just some sort of aberation, or am I misunderstanding something.

Remember, this is in the analogue domain - no digital signal processing is taking place (to the best of my knowledge).
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Old 08-03-2008, 18:28
chrisjr
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Sample frequency and bit depth have absolutely no meaning whatsoever in the analogue domain. They are strictly digital only parameters.

About the only way you might be able to tell if an analogue signal was once a 96kHz sample rate digital signal is if it contains frequencies above 22kHz. That is the cut off for CD format 44.1kHz sample rate.

You could argue that an analogue signal has an infinite sample frequency and infinite bit depth As it is a continuously varying signal with no discernible steps in value (usually anyway). Which is how the raw output of a D-A converter looks, not for nothing is it called a staircase wave form
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Old 08-03-2008, 18:47
RobAnt
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That's exactly what I thought, only expressed much better. Thanks.
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