Bernie, in the days I recorder, the output jack, or phone jack went to an EQ, and reverb unit – then to whatever to record the CD.

I have no knowledge of how the Sansung phone stores the recorded dater. Going through EQ and reverb unit will enhance the sound.

John C.
PS, I am working with the same type of thing now – Cassette tape into a EQ and reverb unit – into I don’t know what.
Fun stuff.