For sound:
* Volume basso: This literally translates to "low volume," and is the most straightforward option.
* Volume delicato: This means "delicate volume," suggesting a soft and refined sound.
* Volume tenue: Similar to "delicato," but with a slightly more formal tone.
For hair:
* Volume morbido: This translates to "soft volume" and refers to hair that is full but not stiff or harsh.
* Volume leggero: This means "light volume," suggesting a subtle and natural fullness.
* Volume naturale: This refers to a natural, unforced volume that is not exaggerated.
For other contexts:
* Volume ridotto: This means "reduced volume," and could be used for anything from the volume of a product to the volume of a conversation.
The best Italian term for "soft volume" will depend on the specific context.