Glicol's `seq` outputs a pitch ratio, not a frequency — feeding it straight to `sin` gives ~1 Hz

The seq node in Glicol emits a pitch ratio derived from a MIDI-like number: step value 60 outputs 2^((60-60)/12) = 1.0, not 60 Hz. Connecting seq output directly to sin or saw runs the oscillator at roughly 1 Hz — inaudible rumble. To get pitched audio you either multiply the ratio up to a reference frequency (>> mul 261.63 for middle C) or feed it to a synth node (sawsynth, bd, …) that expects a ratio rather than Hz.

Examples

Wrong: out: seq 60 _ >> sin — plays at ~1 Hz. Correct: out: seq 60 _ >> mul 261.63 >> sin or out: seq 60 _ 72 _ >> sawsynth 0.01 0.2

Assessment

A student writes out: seq 60 72 60 72 >> sin. Predict what they hear and rewrite the chain to produce two pitched notes an octave apart.