Antiphasing?

[Gopal]

Originally Posted by Timo

But to be honest when you get towards the top end of the Nyquist frequency aliasing still creates artefacts anyway, as pure sine waves are turned into triangle waves or much worse. The digital representation of a sine wave at its Nyquist frequency is not a faithful sine wave, but much more a distorted one, like a simple "on/off" waveform as opposed to smooth curves (although post-filtering helps at the Digital-to-Analogue stage).

Ah, the limitations of the stupid PCM recording format. Bring on the DSD recording algorithms!!!