This is probably a stupid question.
My guess is that quantisation noise is only something present between
the input signal and its digital representation, and hence no change of
the digital representations can do anything about it.
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Regards,
Philipp
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"Wir stehen selbst enttäuscht und sehn betroffen / Den Vorhang zu und alle Fragen
offen." Bertolt Brecht, Der gute Mensch von Sezuan