Very much so. I-M4A yi-MP4 equlethe i-AAC okanye i-ALAC enesandi — emiselweyo ye-iTunes neefayili ze-Apple Music. That determines both the headroom available and whether the saving costs you anything in fidelity.
Yes — i-.m4a ingagcina i-AAC okanye i-ALAC, ngoko iifayili ezilahlekileyo nezingalahlekileyo zisebenzisana noluhlu olunye kwaye kufuneka zicaciswe ngokuhlukileyo ngokujongwa. It is worth knowing before you overwrite an original you might need again.
Ingaba i Cima M4A iya kunyusa ubunjani be M4A audio files yam?