play (something) by ear
US /pleɪ ˈsʌm.θɪŋ baɪ ɪr/
UK /pleɪ ˈsʌm.θɪŋ baɪ ɪr/

1.
menyesuaikan diri, mengalir saja
to decide how to deal with a situation as it develops, rather than by having a fixed plan
:
•
We don't have a set schedule for the trip; we'll just play it by ear.
Kami tidak punya jadwal tetap untuk perjalanan; kami akan menyesuaikan diri saja.
•
I can't give you a definite answer now, let's just play it by ear and see how things go.
Saya tidak bisa memberikan jawaban pasti sekarang, mari kita menyesuaikan diri saja dan lihat bagaimana perkembangannya.
2.
bermain dengan telinga, bermain tanpa not
to play a piece of music without having seen it written down
:
•
She can play any song by ear after hearing it once.
Dia bisa memainkan lagu apa pun dengan telinga setelah mendengarnya sekali.
•
Many jazz musicians prefer to play by ear rather than read sheet music.
Banyak musisi jazz lebih suka bermain dengan telinga daripada membaca not balok.