@jonas Thank you - yes, the files are OPUS encoded. For some reason my phone wants to see .ogg extension, my Mac will have different metadata recognition depending on which app I use to open the files and which filename extension I have. I made two batch scripts to rename the files back and forth but obviously that's not the handiest solution. I have what sound to me like good results using the opus encoder and so I'm trying to just stick with that for any lossy encodings I do. Sorry about the terminology mistake - opus is the encoding method.