Time & clocks
=============


Forking & simultaneity
----------------------

- :doc:`Multi-Part Music <tutorial_10_multi_part>` — Plays two coordinated but independent parallel parts, one for oboe and one for bassoon.
- :doc:`Blocking False <tutorial_03_blocking_false>` — By default `play_note` blocks execution until the note is done playing.
- :doc:`Play Chord <tutorial_04_play_chord>` — Demonstrates `ScampInstrument.play_chord` by playing a famous progression, and then playing it a few more times randomly up and down the keyboard.
- :doc:`Chords and Noteheads <time_clocks_forking_simultaneity_chords_example>` — Chords with per-note noteheads, and a start_chord handle whose pitches change over time.
- :doc:`Voice Leading / spelling policy <pitch_pitch_spelling_voice_leading>` — Rule-based four-part voice leading over a scale, spelled in E major via the `default_spelling_policy` argument. *(needs scamp_extensions)*
- :doc:`Guitar Arpeggios <time_clocks_forking_simultaneity_guitar_arpeggios>` — Fingerpicking-style guitar arpeggios built from overlapping held notes.
- :doc:`Octave Lines <time_clocks_forking_simultaneity_octave_lines>` — A short passage of random notes for violin and piano, which uses the optional note properties argument to `play_note` to apply ottava when notes are very high or very low.


Setting & changing tempo
------------------------

- :doc:`Tempo Change <tutorial_02_tempo_change>` — Same as Hello World example, but repeatedly, with changing tempi.
- :doc:`Piano Phase <composition_form_larger_scale_form_reich_piano_phase>` — Steve Reich's Piano Phase: the same figure forked at 100 vs.
- :doc:`Evolving Form <composition_form_larger_scale_form_evolving_form>` — A piece for cello, pianoteq (MIDI), and SuperCollider (OSC), shaped by envelope-driven formal parameters. *(needs scamp_extensions)*


Advanced
--------

- :doc:`Nested Tempi <tutorial_11_nested_tempi>` — Music running with nested tempi: a trombone plays a cyclic quarter-note pattern on the session's accelerating pulse, while a trumpet, forked onto a child clock, plays a similar eighth-note pattern.
- :doc:`Metric Phase <time_clocks_advanced_metric_phase>` — Rate targets aligned to metric phase, so accelerations and decelerations land on downbeats.