# Tuning Notes ## Targets The validated pitches are C3 through B3 chromatic. Secondary tongues are color features and may be omitted if they reduce sustain or cause cross-talk. ## Tuning Direction - Shorten effective tongue length to raise pitch. - Remove small mass near the tongue tip to raise pitch. - Add temporary mass near the tongue tip to lower pitch during experiments. - Avoid grinding near the root because root stiffness changes unpredictably. ## Workflow 1. Leave each tongue about 8 mm long. 2. Measure raw pitch. 3. Trim in 1 mm steps while far from target. 4. Switch to filing/sanding near 30 cents sharp/flat. 5. Stop at target with the same mallet and support condition used for validation. 6. Retest after rack mounting. ## Cross-Talk If adjacent boxes ring too strongly, try softer isolation strips, more rack mass, or slightly different box spacing before changing tuned tongues.