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 ?!?
Links
SRC Comparisons https://src.infinitewave.ca/
Ian’s videos about ISPs & True Peak limiting:
Inter-sample peaks (ISPs) - are they REALLY inaudible ?
True Peak Limiters - do they REALLY sound worse?
TMS #64 - Aliasing - is it digital audio’s Achilles Heel ?
True Peak limiting filters https://www.izotope.com/tech/aes_loudness
