A MIDI arpeggiator with 672 figures from Chopin's scores. Hold a chord and it comes back in his spacing, register and rhythm.
$35regular price $49introductory price at launch
$35regular price $49introductory price
Sixteen figures over D♭, B♭m, E♭m and A♭7. Pick a pad, then switch while it plays: each new figure cuts in on its next note, as in the plugin. Voice-led walks each figure into the next chord the way Chopin did. Fixed keeps its shape on every bass.
D♭, B♭m, E♭m, A♭7, round and round · 12/8 · 72 bpm · legato
Pad 1 · Nocturne in B-flat minor, Op. 9 No. 1, bar 24, beat 3 (also bars 25, 32, 33, 35 +5). Typeset by Benjamin D. Esham for the Mutopia Project, CC BY-SA 2.5.
nocturne left hand broken chord sweep waltz bass. Left hand dark, right hand claret.
Play or latch any chord. Arpin reads each note's role and what's in the bass.
Each of the 32 pads holds a figure. Click one, play it from a key or automate it.
Each figure is a list of roles: bass, fifth, the tenth above. Arpin fills them from your chord, in Chopin's spacing.
Legato keeps the figure rolling and starts each new chord on its bass. Restart takes it from the top on the next beat or bar.
Pads 2, 3 and 4, switched mid-bar over E♭, Cm, A♭ and B♭7, with B♭7 half a beat late. Legato keeps each figure in step with the bar. Restart takes it from the top on the next beat.
The library comes from 47 Chopin pieces in the Mutopia Project, typeset by 13 volunteers under open licences. Wherever one hand breaks a single harmony, that passage becomes a figure. Every pad names its piece, bar and edition, in case you want to check his work.
Bass, fifth, octave, tenth or higher, then back down.
Most frequent: Fantaisie-Impromptu in C-sharp minor, Op. 66, bar 14, found 22 times.
A chord broken inside a smaller span. 233 of the 251 are for the right hand.
Most frequent: Étude in G-flat major, Op. 10 No. 5, bar 3, found 9 times.
Two octaves or more, straight up and straight back down.
Most frequent: Ballade No. 1 in G minor, Op. 23, bar 69, found 4 times.
Bass on the beat, chord on the beats after.
Most frequent: Prelude in A-flat major, Op. 28 No. 17, bar 27, found 6 times.
Rhythms stay as written, tuplets and all: 184 in eighths, 125 in triplets, 211 in sixteenths, 101 in sextuplets, 19 in 32nds, and 29 that mix them. 399 figures span two octaves and 170 span three or more.
For macOS, locked to your host's tempo and meter. In Logic, the AU MIDI FX sits in front of any instrument. The other builds send MIDI out and can play the sampled piano.
No. Fixed figures from Chopin's scores, played by rule. It runs offline, and the same chords always give the same notes.
It plays the notes you hold, in order. Arpin plays them by chord role, where Chopin put them, so three notes in one hand can become a left hand two octaves wide, bass held underneath.
MIDI out to any instrument, on one channel or one per hand. The instrument builds also play the sampled upright you hear here.
No. It plays in strict time with your host. The rubato and the dynamics are yours.
They're the Chopin scores a program can read under an open licence: 47 from the Mutopia Project so far, with more under review. Saved projects keep their own 32 figures, so library updates never change how they play.
Logic, Live, Bitwig, Reaper, Cubase and FL Studio are checked before release.
$49, or $35 at launch. The date isn't announced yet, and the waitlist hears it first.
One email when Arpin ships, with the release date and the $35 introductory price. Nothing else.
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