Addendum to the scientific paper: "Real-time, Low-Latency Audio Processing in Java", by Nicolas Juillerat, Stefan Müller Arisona, Simon Schubiger-Banz, ICMC 2007 - §2.3: The new GraalVM Java virtual machine comes with a tool "native-image" that can perform ahead-of-time compilation. This can solve the "warmup time" problem discussed in this section. - §2.4: - While the results were bad with the IBM J9 VM (now called Semeru runtime), it came (and still comes) with an optionnal "metronome" garbage collector that is a soft-realtime one, and does not introduce any pause of more than about 1 millisecond. This is not the default garbage collector though. - The Sun JRE's (now OpenJDK) default garbage collector does not cause long GC pauses, but only as long as only short-lived objects are created (for instance in every iteration of the main loop). However: - There is not guarantee. - If long-lived objects are created (this is almost always the case when a GUI is present), it may eventually occasionally trigger "full" GCs of potentially hundreds of milliseconds. - Recent versions of the OpenJDK now provides the low-pause ZGC garbage collector, with pauses below 1 milliseconds (even lower depending on the system) in *all* situations. - §3.1: The "Decklight 4" project itself (mentioned in the paper) is not publicly available. However, at https://www.pitchtech.ch both the "PitchTech" and "PitchBox" projects (in the "Software" section) are based upon "Decklight 4". - Both projects feature the pitch shifting implementation mentioned in this paper in §3.2. It is referred to as the "Ocean" algorithm in PitchTech (and "Pitch Shift" with "Voice" mode in PitchBox), and is presented in more details in "Low latency audio pitch shifting in the frequency domain", by the same main author, published by IEEE ICALIP 2010. - Both projects also feature the new "Rollers" pitch shifting algorithm, which is an ultra low-latency (< 5ms) pitch shifting implementation, presented in "Low latency audio pitch shifting in the time domain" by the same authors, published by IEEE ICALIP 2008.