The Mastering Show

The Mastering Show #90 - Inter-sample peaks and True Peak limiting - the devilish details

10.13.2023 - By Ian ShepherdPlay

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Everyone is talking about inter-sample peaks and True Peak limiters - or in fact it’s more accurate to say they’re arguing about whether ISPs are audible or not, and whether True Peak limiters sound bad !

In this episode I’m joined by Alexey Lukin, iZotope’s “godfather of RX”, to talk in detail about exactly what ISPs are and why they’re so confusing - including:

* How are inter-sample peaks measured, and why do you see different results with different meters ?

* What are DSP overshoot peaks, and how are they different ?

* What does over-sampling have to do with all this, and why is it important ?

* Do True Peak limiters really sound bad, and how should we test them ?

* Why will they NOT prevent lossy decoder clipping, sometimes ? And

* What the hell are we supposed to do about all this ?!?

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