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Re: [xl7] Sample bit depth?

2004-01-13 by aeon

>> I have tested just those samples (among many others)
>> by sampling my XL-7 via the S/PDIF out with all
>> engine components disabled or at nominal levels...
>> 
>> the basic analog waveshapes are far below 0dbFS, so
>> that is why I assumed there is a large degree of
>> gain scaling occurring in the engine itself...even
>> when boosting a layer via +10 gain, it is still below
>> full scale.on 1/13/04 4:32 PM, Aaron Eppolito wrote:

> Right, remember the samples are 16 bit while the output
> is somewhere between 20 and 24 bits (can't remember).
> Playing a single 16 bit waveform should theoretically
> be much below 0dbFS, yet still retain its full 16 bit
> resolution.

nope...

0dbFS is the baseline, and it goes down from there...

theoretically 96dB for the 16-bit, and 144dB for the
24-bit, but in either case, the first bit of the
sample corresponds to the first 6dB of dynamic range...

so regardless of the fact the samples are 16-bit,
if they are at full scale and the digital output
is not, the E-mu engine is doing gain scaling
that cannot be overcome/compensated for by
adjusting engine parameters.


cheers,
aeon

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