There are songs that are straight-up pop records, songs that have a lot of depth, some dance, some acoustic.
Darren and him were talking and Bruce had an acoustic guitar and picked it up and played the song for Darren.
George would take out his lyric book and acoustic guitar and play us the song we would be working on that day.
c.1600, from French acoustique, from Greek akoustikos "pertaining to hearing," from akoustos "heard, audible," verbal adjective from akouein "to hear," probably from copulative prefix a- + koein "to mark, perceive, hear," from PIE *kous- "to hear," perhaps from root *(s)keu- "to notice, observe" (see caveat). Acoustic guitar (as opposed to electric) attested by 1958. Related: Acoustical; acoustically.
acoustic a·cous·tic (ə-kōō'stĭk) or a·cous·ti·cal (-stĭ-kəl)
Of or relating to sound, the sense of hearing, or the perception of sound.