I've been recording my lectures on my voice recorder (in the form of an mp3, approx 450mb) and I like to listen to the recording on the way home but the sound from the recorder is terrible. I want to load it onto my iPhone 6 (latest ios) and play it from that... I take my macbook air with me, so I load the mp3 from the voice recorder onto my macbook air, and then using iTunes I add the mp3 to the USB Disk app (by Imesart). This will allow me to play it using the app but I would really like to be able to add it to the proper Music app so I can adjust the EQ. Is there any way of doing this? Oh, also I can't use iTunes on my macbook air because syncing with that threatens to erase all the other mp3s on my iphone (my main iTunes that I use to sync with my phone is on my iMac). Hope this wasn't too confusing... any help would be much appreciated. Thanks!