Hi there, Latest version. (3.2.0 60) Win 10. I haven't managed to figure out which ones are afected and which not, but some m4a files behave wierdly in Traktor. It loads them, it analyzes them correctly, it lets you make all the cue points. Then, when you unload the file, it saves all the information to both places. To it's own memory and to the tags in the file. On some of those m4a files, it writes down everything correctly except for the BPM information in the tag. (Sometimes it just rounds it down, sometimes it's exactly 1 BPM lower.) You don't know about it as long as you don't move the file. If you don't, Traktor will load the correct meta data from it's own storage. But if you move the file to a flashdrive and go play it on friend's setup, his Traktor will load the bad value, messing up the grid. I was digging a little deeper. It's really similar to this 7 year old (?!?!) topic: https://www.native-instruments.com/forum/threads/wrong-bpm-detection.170571/ Also when you change "Write all the tags" to "Write only custom tags", Traktor uses tempo from it's proprietary tag and everything gets stored correctly. ...but it removes all other tags in m4a too. Not good. It's really a bug in saving procedure of m4a. I literally have a song here, that detects correctly as 117 bpm, Traktor writes it to the file as 116 bpm (both straight, no decimals) when I go to the file, make a copy (so I bypass the Traktor-storage metadata load) and manually outside of Traktor change the bpm to 117 in the file, it loads alright to Traktor. ...but if I add a Cue point or make any other change to the meta data, it rewrites the tags, making the bpm in the tag 116 again. It's not nice, cause I have quite a few songs bought on iTunes. Recompression to mp3 is quite nasty qualitty-wise, so my only chance is to make FLACs out of them. Flacs behave correctly. They don't care what's in the "bpm tag", they loead it from the proprietary Traktor tag. Would it be please possible to make Traktor behave the same when dealing with m4a? Cheers, Martin.