ECHO

All audio is procedurally generated from the entity's beliefs.
Dissonant intervals when it fears you. Warm consonance when it trusts.
Fast tremolo when aroused. Slow breathing when calm.
The sound reflects its model of you — not reality.

Stand perfectly still. If it already believes you're aggressive,
you'll hear tension — harsh timbres, rapid pulses.
Rush toward it gently. If it believes you're patient,
you'll hear warmth. The gap between your action and the sound is the story.

Aggression — minor seconds, fast tremolo, bright noise
Patience — perfect fifths, slow pulse, warm filter
Curiosity — major thirds, moderate energy, open
Caution — minor thirds, narrow filter, long reverb
Rhythm — perfect fourths, synchronized tremolo

First impressions get amplified. The entity over-indexes early signals.
Three personality archetypes each misread the same behavior differently.
When the dominant belief shifts, you hear a tonal sweep — the entity
updating its model. That sound is it changing its mind about you.