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RE: DSD Numbers.

" I assume Sony XA5400ES SACD player incorporates one digital filter ?"

No it actually has three as far as I can deduce. It uses an 8x oversampling filter for redbook discs so as to present the resultant data to the final conversion stage at a similar rate to that of SACD. However as the frequency responses for CD and SACD are specified as different (as they have to be - oversampling and upsampling adds no data), I conclude that different digital filters are used for each of the formats (as is the usual case with CD/SACD players). However I may be wrong as I can find no information on this. If I am it therefore has two filters.

So in this example I guess that use of the word " requires" rather than just " has" would be appropriate as all the filters are necessary for the operation of the machine and are not user selectable.

However you referred to Sony digital processors with no digital filters, rather than one, in your earlier message and that is what my query was about.

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