In ChucK a raw MIDI integer sent to `.freq` plays that many Hz — use `Std.mtof` to convert

.freq on an oscillator expects a frequency in Hz, not a MIDI note number. Writing 60 => s.freq plays roughly 60 Hz — a very low rumble — not middle C. Std.mtof converts a MIDI number (float-ish) to Hz, so Std.mtof(60) => s.freq gives the intended pitch. This mix-up is common for people used to trackers or MIDI-first environments where notes are named by number.

Examples

Std.mtof(60) => s.freq; // correct middle C (~261.6 Hz) 60 => s.freq; // plays ~60 Hz, not middle C

Assessment

Explain what 60 => s.freq plays and why it is wrong for MIDI note 60, then write the correct line to sound that note.