Pendulums vs ARPJAM Player

Twin Double Pendulums is more chaotic than my other engine using 2 Lorenz. This is more suited for Oriental music like Koto. The pendulums are released from the same angle, one of them offset by a ten-thousandth of a degree. Both drive a lead voice. While the runs agree the two voices land on the same note, so you hear a single line over a rolled arpeggio. As the gap opens the twin becomes a real second voice, chords swell in behind it, and once the runs have parted for good the whole band is in. Nothing is pre-recorded and nothing loops. Every release is new. THE SONG FORM IS THE PHYSICS There is no bar counter and no scripted arrangement — the piece is however long the pendulums stay together. Their separation is the structure: IN SYNC — lead and twin on the same note, one line over an arpeggio that re-voices itself every bar. DRIFTING — the twin splits into real intervals; chords enter and swell. DIVERGED — bass enters, the grooves open up, the mood engine wakes. Watch it happen: the gap is plotted live on a log scale with the running Lyapunov exponent beside it, so you can see the divergence coming before you hear it. DRAG THE RIG Pull the pendulum round to set the release angle and both twins let go again, from anywhere in the piece. Release it inside about 79 degrees and the motion stays regular, the twins never part, and the solo holds indefinitely — chaos is a regime, not a law, and the scope draws you that boundary while you drag. Outside it, the twin offset sets how long the solo lasts before chaos takes over, though only logarithmically: each extra decimal place buys about the same few seconds again. CHAOS PROPOSES, A POLICY DISPOSES The far bob's position proposes a region of pitches rather than one note. A Markov policy then decides what actually plays, learning from its own output and rewarding intervals that sound consonant. Slide BLEND to choose who wins. WHAT YOU GET • 26 scales — major and minor modes, pentatonics, blues, whole tone, harmonic and melodic minor, altered, both octatonics, and folk scales from Japan, China, Egypt, Spain, Arabia and Hungary • 8 accompaniment styles — chaos grooves, jazz comping with walking bass, stride piano, Alberti bass, classical, arpeggios, oriental rolls, ambient • Four sampled instruments — grand piano, koto, zither and shakuhachi — plus synthesised voices: soft piano, glass, strings, FM bell, AM organ, pluck, fat saw and more • 6 moods on a valence/arousal plane, from serene to tense, driving chord quality, register, tempo and note length • Expression built into the physics: ring, note bend, grace notes, and octave doubling called by the second bob • Live displays — the rig itself, the divergence chart, the note-probability distribution the engine samples from, and the mood point • Record a take and export it as a standard MIDI file to the Files app — lead, twin, chords and bass on separate tracks TWO AUDIO UNITS Pendulums ships as an instrument AUv3 and as a MIDI processor AUv3, so it can either play its own sounds or sequence any other instrument in your host. Lead, twin, chords and bass each send on their own MIDI channel, so one instance can drive four different instruments. Both Audio Units follow your host's transport and tempo — hit play in AUM, GarageBand, Logic, Cubasis or Zenbeats and it locks to the grid, on the bar line, even if you start mid-bar. One install registers both. CREDITS Sampled piano: Salamander Grand Piano by Alexander Holm (CC BY 3.0). Koto and shakuhachi: FluidR3 GM soundfont by Frank Wen (MIT). Zither: đàn tranh from the Versilian Community Sample Library (CC0).

ARPJAM Player is a device for leaving your JAMs running. Line up the JAMs you want to hear and give each one a play time. When the time is up it fades out on its own and hands over to the next one. Nothing else to do. ■ For as long as you like Play times run from one minute to twelve hours, set on a reel. Leave one JAM running all afternoon, or cut them short and keep moving. It is built for the kind of listening that lasts a whole opening shift. ■ Matched loudness JAMs vary in level. Each one is measured once when you add it, and matched on playback — the loud ones come down, the quiet ones come up. No sudden jump when the next one starts. Nothing chases the level while the music plays, so the volume never moves mid-performance. ■ With the screen off Background playback is supported. Lock the screen and it keeps going. Play, pause and skip from the Lock Screen or Control Center. ■ JAM Library Open the JAM Library from inside the app and add published JAMs directly. Browse by genre and see the artist, the notes, the BPM and the key. Official JAMs and submitted JAMs sit side by side. You can also import .arpjam files stored on your device, including files written by the earlier ARPJAM. ■ It never plays the same way twice The ARPJAM engine is not playing back a fixed score. It builds the performance as it goes, following rules. The same JAM sounds different every time you play it, so it does not become a loop you get tired of — even after hours. Same engine as ARPJAM Studio. ■ Made for · Saunas, spas, treatment rooms · Cafes, shops, galleries · Working, studying, winding down · Exhibitions and installations — — ARPJAM Player does not create JAMs. To make them, use ARPJAM Studio.