Like the name and description suggested, this app is able to convert from a large variety of audio formats but output to MP3 only. I was able to convert a dozen songs in FLAC format to MP3 format. They were converted to variable bit-rate mp3 format, although there is also an option to convert to constant bit-rate mp3 (320kbps maximum). There is no problem with the mp3 songs I converted and I was able to import all the converted mp3 songs to iTunes. ONE REALLY IMPORTANT THING TO NOTE, there was a moment that I misunderstood that this app doesn’t actually convert and output any audio file because I wasn’t able to find any button or option on the app’s window to go to the folder where the converted files are. I did a search for the audio and found out that the converted mp3s were actually in this directory: <username>MusicMP3-Converter. If you still can’t find the converted file then searching for it with the song’s name would help. This app would benefit from a button to go to the output folder, but other than that, it worked great for me!