What interface sound
could feel like.

A collection of interface moments, sounds, and principles.

State change

Positive states rise. Negative states fall.

Arrival

Notifications should be noticed, not announced.

Confirmation

Booking should feel committed, not tentative.

Passwords do not match

Failure

Informative. Never punitive.

Compare voices

Hear the same interface moment through three interpretations.

Signature

Balanced. Quiet. Reference implementation.

Velvet

Warm. Soft. Material.

Crisp

Sharp. Bright. Precise.

State on
State off
Arrival
Confirmation
Failure

Six rules. Press them.

Synthesized live, never identical twice. Quiet by design - a bonus layer, never the message.

V - 1/6

Voluntary

Sound is always opt-in. Mute is visible, persistent, remembered - never the only signal.