How to Say "loud" in Spanish
The most common Spanish word for “loud” is “alto” — use 'alto' when describing the volume of music, voices, or specific noises that are at a high volume..
alto
/al-toh//ˈalto/

Examples
La música está muy alta.
The music is very loud.
Por favor, habla más alto, no te oigo.
Please, speak louder, I can't hear you.
Le gusta leer en voz alta.
He likes to read out loud.
A Describing Word Acting Like an Action-Modifier
In English, you'd say 'speak loudly,' using an adverb. In Spanish, you often use the adjective 'alto' instead: 'hablar alto.' It describes the how of the action. It usually stays 'alto' but can sometimes change to 'alta' if it's clearly describing a feminine thing, like 'la música está alta'.
fuerte
/FWER-teh//ˈfweɾte/

Examples
El altavoz suena muy fuerte.
The speaker sounds very loud.
Este queso tiene un sabor muy fuerte.
This cheese has a very strong flavor.
La música está demasiado fuerte, no puedo oírte.
The music is too loud, I can't hear you.
Tengo un dolor de cabeza muy fuerte.
I have a very strong headache.
Alto vs. Fuerte for Loudness
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