de oído

by ear

→ de
phrase Rare #30,723
by ear In expressions about hearing, it can mean hard of hearing; in music, it means playing or learning by listening rather than reading music.
SP: Aprendió a tocar la guitarra de oído.
EN: He learned to play guitar by ear.

Ella toca el piano de oído.

She plays the piano by ear.

Mi abuelo es un poco duro de oído.

My grandfather is a little hard of hearing.

¡Escucha la música, conduces de oído!

Listen to the music; you’re driving by ear!

— Diva (1981)

Tom toca la armónica de oído.

Tom plays the harmonica by ear.

Tom es muy bueno tocando piano de oído.

Tom is very good at playing piano by ear.

¿Sabe leer música o toca de oído nada más?

Does he know how to read music or does he just play by ear?

¡Soy un poco dura de oído!

I'm a little hard of hearing!

— M: El maldito (1931)

Lo tocaremos de oído.

We'll play it by ear.

Mi padre es tan viejo que es duro de oído.

My father is so old he's hard of hearing.

No me dijiste que fuera duro de oído.

You didn't tell me I was hard of hearing.

— La Nuit américaine (1973)

Tom puede tocar el piano de oído bastante bien.

Tom can play the piano by ear quite well.