Candidate only; not cleared for children. An educator listens to every WAV from beginning to end on the actual classroom device, sets and tests a comfortable volume locally, checks for clicks or other artefacts, invites child choice, and may decide not to play any file. Digital peak below 6% full scale is not a sound-pressure or comfort guarantee. No headphones are required. Do not loop or amplify a file to force audibility. No child data is captured.
All WAVs are original 22,050 Hz, 16-bit mono PCM. Every event is the same generated 330 Hz sine source, 0.20 s long with a short fade at each edge, at 0.10, 0.60, 1.10 and 1.60 seconds; the file ends at 2.40 s. The V (very soft) tone is programmed at 0.018 peak fraction of full scale; S (soft) at 0.050. These are relative file amplitudes. Pitch, timbre, time and duration stay fixed. Any perceived effect depends on listener, room and device. The written transcript below is the complete intended audible event sequence; there is no voice or background sound.
| Candidate | Complete event transcript | Matching no-sound route |
|---|---|---|
| Gentle lift (playback review held) | 0.10 V/very soft; 0.60 V/very soft; 1.10 S/soft; 1.60 S/soft; otherwise digital silence. | Put V V S S cards in four fixed places; mark planned lift after 2. |
| Gentle release (playback review held) | 0.10 S/soft; 0.60 S/soft; 1.10 V/very soft; 1.60 V/very soft; otherwise digital silence. | Put S S V V cards; mark planned release after 2. |
| Soft return (playback review held) | 0.10 V/very soft; 0.60 S/soft; 1.10 S/soft; 1.60 V/very soft; otherwise digital silence. | Put V S S V cards; identify lift after 1 and release after 3. |
The no-sound route teaches and checks the notation/planning goal with exact event order. It does not substitute as evidence of hearing a level difference, producing one, or finding the sound comfortable. A silent route can also be used as the default for the whole class. If a child asks to stop, stop; record only their own words if relevant, never a diagnosis.