Bug report: WaveLab Pro writes a malformed iTunes trkn atom in M4A renders — track number invisible in Apple Music Summary When rendering to M4A (AAC), WaveLab Pro writes the iTunes-style track-number atom (moov.udta.meta.ilst.trkn) with an invalid data-type indicator (0x0000001F instead of 0x0000…

I don’t know who you are, but thank you for this outstanding, detailed report. This will be fixed in WaveLab 13.0.30

Hard to discern these days between honest and wholesome human investigation/reporting, and something that’s the result of several prompts into a highly sophisticated AI coding engine… Either way, bravo for the exemplary report.

[image] Puma0382: Hard to discern these days between honest and wholesome human investigation/reporting, and something that’s the result of several prompts into a highly sophisticated AI coding engine… I believe this report is a human finding that was then well laid out by some AI. One of th…

Hi all, Thank you so much for taking this into consideration and I’m so glad that it will be fixed. This is indeed the results of my human searches and findings and claude code finalizing the detailed report and also fixing my own ffmpeg wrapper which was lacking efficiency in waiting for wavelab …

[image] PG1: I believe this report is a human finding that was then well laid out by some AI. One of the best ways to use AI in many fields, in my opinion… Human first, then AI for polishing. Oh - I’m 100% with you on that.! So happy to hear this was some actual ‘human effort’… :wink:

[image] raphael29: This is indeed the results of my human searches and findings and claude code finalizing the detailed report and also fixing my own ffmpeg wrapper which was lacking efficiency in waiting for wavelab to finalize the files. Ah.! Perfect… just as PG surmised… it is a terrific i…

I can confirm this is fixed in release 13.0.30. Thank you so much! Raph PS, I found another one regarding the TPOS field and opened a new topic: [image] Bug report: M4A: disc number (TPOS) lost - WaveLab 13.0.30 writes the iTunes disk atom as 0/0 WaveLab Hey…

Bug report: WaveLab Pro 13 writes a malformed `trkn` — track number invisible in Apple Music

WaveLab

raphael29 July 30, 2026, 10:15pm 8

I can confirm this is fixed in release 13.0.30. Thank you so much!

Raph

PS, I found another one regarding the TPOS field and opened a new topic: