How do I transfer music from my iphone to my computer?

See also Recover your iTunes library from your iPod or iOS device - Apple Community.

tt2

Trealwil88 wrote:

I have an old desktop that has an abundance of music on it. I recently got a new phone and transferred all of my music from the old computer to my new phone. I now have a NEW computer that I would like to transfer the music from my phone to the itunes. How do I go about this. I've tried syncing the phone, connect it through wifi and selecting file transfer. The problem I'm running into is that in file transfer the in no option to select music. Does anybody know what to do here? Please Help!

It is a one way sync Itunes to apple device. Syncing to a "New" Computer or replacing … - Apple Community

If you still have access to the old pc, copy your itunes media library and music and paste into your new computer.

If you don't have access to the old pc, then follow the steps in the link I provided.