Stochastic Lab vs ChoirXML

Stochastic Lab is a generative composition tool built around the mathematical methods Iannis Xenakis used to compose: probability distributions, stochastic processes, and Markov chains, applied directly to sound. GENERATE • 6 generation modes: melody, rhythm, cluster, cloud, pointillistic, sequence • 6 probability distributions: uniform, Gaussian, exponential, Cauchy, Poisson, linear decay • Full control over density, register, tempo, block length, and Markov-driven contour • Choose a single orchestral section (strings, winds, brass) or let the generator blend all three • Pick exactly which percussion sounds are in play REAL INSTRUMENTS • Real sampled strings (high & low), winds, brass, and an 8-piece percussion kit — not synthesized approximations • Authentic short (pizzicato/staccato) and sustained articulations • Genuine glissando and tremolo, generated as part of the composition itself EDIT & PERFORM • Full piano roll editor: drag notes, edit pitch by semitone, adjust duration and velocity • A live recording keyboard to play your own material into any layer • Freeze a generated block into a fixed, fully editable sequence at any time SCORE • A live, Xenakis-style graphic score (particle-cloud visualization) for every layer • Expand any layer — or the full combined score — to fullscreen, with zoom and a moving playhead • Export the score itself as a printable, shareable image SEQUENCE & ARRANGE • Multi-layer Sequencer for building full compositions from generated or recorded material • Song mode for arranging multiple sections into a complete piece EXPORT • Export audio (WAV) and MIDI, mixed or as separate stems per layer, straight from the Generator, Sequencer, or Song view AUv3 PLUGIN • Stochastic Lab also runs as a real Audio Unit (AUv3) instrument inside GarageBand, Logic, AUM, and other hosts • The actual generative engine runs live inside your DAW — not a static sample player • A dedicated on-plugin control panel (mode, distribution, density, pitch range, tempo, and more), with a Preview button to audition before recording • Full MIDI recording support, including pitch bend and glissando THEORY • A built-in Theory section covering Xenakis's life and stochastic music concepts, with real-instrument audio examples for every distribution Stochastic Lab works entirely on-device — no account, no internet connection required, no data collected.

ChoirXML reads printed choral scores and turns them into MusicXML – the file every common notation app can open. An old sheet, a scan or a photo becomes an editable score you can listen to, transpose, re-engrave or share with your choir. IMPORT • PDF or image from Files, a photo from your library, or scan with the camera • several pages into one song • pages are straightened automatically • choose the kind of score or let ChoirXML tell: choir, piano, choir with piano, instrumental RECOGNITION • staves, clefs, key and time signatures, including changes along the way • notes and rests down to sixteenths, dots, triplets, chords and several voices per staff • ties, slurs, fermatas, multi-bar rests and pickup bars • lyrics with several verses – even when printed once for all voices • dynamics (pp to ff), crescendo and diminuendo hairpins, accents, staccato, tenuto and breath marks • chord symbols above the notes • pale, grey photocopies too CHECK AND CORRECT Your original on top, the recognised music below – bar by bar in the same place. Only what was uncertain is marked in red, and ChoirXML asks exactly about it: Is the length right? Is the pitch right? Does this syllable belong to this note? A loupe shows that spot of the original. • tap a note to change pitch, length, accidental, voice or expression • delete single notes of a chord • insert missing notes for one voice or for both – also onto the stem of a note where the voice divides • insert missing bar lines, set or remove a pickup bar • confirm a voice that sings only a few notes of its own right where they stand • assign a syllable by tapping its note • set clefs, keys, time signatures, slurs, fermatas, final bars and repeats • undo and redo every change LISTEN Play back what was recognised before you share it: with a recorded grand piano and a choir sound, the singing voices as a choir or as a piano. The sounding notes light up, and you set the tempo. EXPORT MusicXML with all voices, verses, markings and chord symbols – with one staff per voice (soprano, alto, tenor, bass, each with its own sound and part in your notation app) or like a piano score on two staves. Save it to Files or share it straight to your notation app. PRIVATE Everything happens on your iPad. No account, no subscription, no ads, no data collection. Your music leaves the device only when you share it. GOOD TO KNOW Recognition works best with cleanly printed music. Handwriting, smudged copies or very dense scores need more corrections – ChoirXML shows you exactly where. Please respect the rights to the music you scan.