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Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it.

RE: slow/fast roll-off filters pre-ringing in real world?

With a computer audio system and an audio editor with resampling software you can explore these tradeoffs. You will also need a few high resolution audio files that you can convert down to CD quality in different ways. You will be able to look at plots and see ringing and, more importantly, you will be able to relate the filtering settings to what you can hear.

All the various possible filtering settings used to make and play back 44 kHz recordings are compromises of one form or other. There will either be high frequency roll off or harsh aliasing distortion if a slow roll-off filter is chosen (depending on filter offset). If a high roll-off filter is chosen these tradeoffs will be less severe, but then there will be ringing which will smear the transient response. Depending on the filter the ringing can occur before and after the transient or entirely after the transient, but the price will have to be paid one way or the other and there will be a tradeoff between tonality and imaging. The choice of best upsampling filter (as used in playback) will depend on the choice of downsampling filter (as used in recording).


Tony Lauck

"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar


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  • RE: slow/fast roll-off filters pre-ringing in real world? - Tony Lauck 07/17/1511:38:18 07/17/15 (0)

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