A slow phasor~ scaled and passed through mtof~ produces a repeating one-octave pitch sweep

A standard Pd idiom builds a pitch sweep from a low-frequency ramp. phasor~ 0.5 generates a 0-to-1 ramp once every 2 seconds (frequency 0.5 Hz) — so low it acts as an LFO. *~ 12 rescales the ramp to 0-12; +~ 60 shifts it to 60-72; mtof~ converts those MIDI-note values (60 is middle C, each step a semitone) to frequencies in Hz, giving a one-octave ramp starting at middle C. Feeding that into osc~ → *~ 0.2 → dac~ produces an ascending octave sweep that repeats every 2 seconds. The patch shows several ideas at once: phasor~ as LFO, signal scaling with *~ and +, and mtof for note-to-Hz conversion.

Examples

phasor~ 0.5 → *~ 12 → +~ 60 → mtof~ → osc~ → *~ 0.2 → dac~: a one-octave ascending sweep from middle C, repeating every 2 seconds. Change phasor~ 0.5 to 1 and it repeats every 1 second.

Assessment

In the phasor→mtof pitch-sweep patch, what does each signal-path object (phasor~ 0.5, *~ 12, +~ 60, mtof~) do to the signal? What changes if phasor~ 0.5 becomes phasor~ 1?