Record music through wire not microphone?

It's not the app, it's the hardware. If the computer has audio input just connect the audio lead from the CD player to the audio input jack. However, I don't know of any smartphones that have audio input jacks. There might be a recording app that allows you to use Bluetooth as the input (you'd need a CD player with Bluetooth output, or a Bluetooth adapter to plug into the CD player's audio output) but I haven't seen any.

Any audio recorder will record any audio you can feed to it.

 

You could probably use an adapter and record on the mic in line. However, I have no idea how good of quality that would be, and it would definitely only be in mono.

If you ask me, you would be better off recording the set on an actual PC like a laptop with a real stereo audio in jack.