Hello everyone, I use Adobe Audition 2022 Build 184.108.40.206 and as I made the problem clear in the title when I export a file as MP3 with 320 kbps quality via Audition, frequencies between 16 kHz and 20 kHz are cut off. this problem is independent of the source file. for example, when I export a FLAC file as MP3 this happens. When I edit a full frequencies range MP3 file (20 Hz - 20 kHz) and than export it this problem also happens too. The funny thing is that when I do the export process with Audacity which is a free and open source software, this problem does not happen. I tried the same experiment with other paid softwares such as Acoustica 7, iZotope Ozone 9, iZotope RX 9 Audio Editor, and as I mentioned, frequencies above 16 kHz are not cut like Audition in any of them. I think this problem is caused by Fraunhofer MP3 Encoder but I can't do anything to change it. Therefore I will try to find the solution by writing my problem here. I also want this problem to be seen by the authorities. I will also share the screenshots containing the problems I mentioned with this post.
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Yes, almost certainly the Fraunhofer encoder, but a) you can't change it and b) 'the authorities' (we call them the developers) won't see this, as we're a U2U forum. If you wish to make a feature request that they will see, you need to post it here.
First of all, I am relieved that you answered in a way that proved my guess. Secondly, I'll reopen the thread where you directed me, thanks for that.