Tutorial

Home — MIDI send

• Rhythm (0/1, comma-separated): the rhythm row, where 1 is a hit and 0 is a rest (e.g. 1, 0, 1, 1)
• Group: optional grouping number that visually chunks the 0/1 display; it does not change the rhythm
• start index: cyclically rotates the row so it begins on the chosen index
• remove from left / remove from right: trim that many cells off the start or end of the row
• # row cells: the resulting row length after trimming
• Scale / MIDI notes: choose a scale preset or type comma-separated MIDI note numbers (middle C = 60). These notes are cycled in order, one per hit (1) in the rhythm
• transpose down / up: shift every note by one semitone. randomize notes order: shuffle the note sequence
• Tempo (BPM) and note division (1/16, 1/8, 1/4): playback speed and how each rhythm cell maps to note length
• # hits, # notes in seq, repeats after: reference values. "# hits" is the number of 1s, "# notes in seq" is the number of MIDI notes, and "repeats after" is how many times the rhythm must cycle before the first note again lands on the first hit
• Output and SEND MIDI: pick your MIDI output device (it appears after the first SEND MIDI enables Web MIDI) and start playback; the button becomes STOP while playing. Keep the app at least partially in focus so MIDI timing stays accurate

Sending MIDI out (setup)

• Windows: run choco install fluidsynth, then run fluidsynth to start the synth
• macOS: install with brew install fluidsynth or sudo port install fluidsynth
• Android: install the FluidSynth MIDI Synthesizer app (by Volcano Mobile) from the Google Play Store; it appears as an available MIDI output (a SoundFont .sf2 file is required)
• iOS: there is no standalone FluidSynth app. Instead install a MIDI synth such as NS MIDI Player from the App Store to act as the output, and open this app in a Web MIDI Browser (Safari does not support the Web MIDI API) so it can send notes to the synth

1D Cellular Automata Midi Sequencer (Wolfram CA)

• Rule (0-255): selects the automaton. The rule visualization shows, for each of the 8 possible three-cell neighborhoods, what the cell below becomes on the next iteration (e.g. for rule 30, black/white/white becomes white). The Step, Reset, and Auto-run controls only drive this visualization
• Row: picks which horizontal row of the automaton to read as the rhythm; black cells become 1 (hit) and white cells become 0 (rest)
• Group, start index, remove from left/right, # row cells: shape the rhythm exactly like on Home (chunk the display, rotate the start point, trim either end, and view the length) so a row can be made to fit a desired bar count
• MIDI notes, Scale, transpose, randomize, Tempo, # hits / # notes in seq / repeats after: behave the same as on Home
• mirror rule / black-white swapped / reverse black-white swapped: the equivalent rules that produce related patterns, shown for reference
• Send rhythm to main and Send notes to main push the current rhythm and notes to the Home page; go to Home and press SEND MIDI to hear them

Up Down Midi Sequencer

• scale preset / scale: choose a preset or enter comma-separated scale degrees. The start note transposes the whole scale to begin on that note
• start note: the first note of the sequence
• # repeats: how many times to repeat all row operations; the last row's "jump size to next operation" determines the starting note of the next pass

• # notes in operation: how many notes this operation produces
• step size: the jump (positive or negative) used to move through the scale. Example: a major scale 48, 50, 52, 53, 55, 57, 59 with step size 3 yields every third note 48, 53, 59, 64, 69, ...
• jump size to next operation: how far to move before the next operation's first note. Example: if the last note was 69 and the jump is -2, the next operation starts two scale degrees lower at 65

Graph Traversal Sequencer

• Mode: NO DRAW (do nothing), ADD NODE (click empty canvas to place a node), ADD EDGE (click the originating node, then the destination node), REMOVE NODE (click a node to delete it and its edges), REMOVE EDGE (click originating then destination node)
• Graph: Directed adds the edge one way; Undirected adds it in both directions
• Start node index: the node the traversal begins from
• MIDI note per node: set a MIDI note for each node (defaults to its index; middle C = 60). Pick a scale preset to assign notes, or randomize notes order
• Generate sequence: finds all paths from the start node, each running until a dead end or until it revisits a node (cycle closure). Each path is listed separately and concatenated into the flattened output. Drag rows to reorder; the flattened output follows your ordering. # notes shows the total in the flattened result
• Adjacency matrix: a reference grid where each row's marked columns are the nodes reachable from that row's node
• Send notes to main / Send notes to Take 2 push the flattened sequence to Home or to the Take 2 page

Take 2 Sequences And Do A Bunch Of Stuff

Per-sequence operations

• Mod By Add By: apply "mod by" then "add by"
• Add By Mod By: apply "add by" then "mod by"
• Rotate Left
• Rotate Right
• Reverse
• Sum Inversion: uses the "sum inversion #"
• Tower of Hanoi It: uses "# discs t_o_h"

Replacement

• set "replace this" and "replace with" to define the find and replacement values
• apply replacement to sequence 1 or 2: replaces the matched values within that sequence
• replace with string sequence 1 or 2: writes the replaced result to the output

Both-sequence operations

• splice sequences: interleave the two sequences
• multiply sequences by scalars, add together, mod by: uses the two scalars and the shared "mod by"

Output and holds

• results land in the output box
• use the move buttons to push a value into sequence 1, sequence 2, or the two "hold this for a sec" slots
• every box has a Send notes to main button to push that value to the Home page

Rhythm Compositions

• [3, 1, 1] → [1, 0, 0, 1, 1]
• [2, 2, 1] → [1, 0, 1, 0, 1]
• [2, 1, 2] → [1, 0, 1, 1, 0]
• [1, 3, 1] → [1, 1, 0, 0, 1]
• [1, 2, 2] → [1, 1, 0, 1, 0]
• [1, 1, 3] → [1, 1, 1, 0, 0]

• rhythm space (1-16): the total number of cells (16th or 8th notes) the rhythm spans
• # of notes: the number of hits (1s); the rest are rests (0s). It cannot exceed the rhythm space
• Generate Rhythms: lists every composition for those values. Click any one to select it, or use Select Random
• Replace rhythm in main: overwrites the Home page rhythm with the selected one. Add to rhythm in main: appends the selected rhythm to the existing Home rhythm (the Home rhythm must already be valid 0/1 values)

Morse Code Rhythm Generator

• YYZ morse code: dot = 1, dash = 2, and none of the standard rest gaps
• Standard morse code: dot = 1, dash = 3, inter dot/dash gap = 1, inter letter gap = 3, inter word gap = 7 (standard Morse inserts these rests)
• All parameters are adjustable: Dot duration, Dash duration, and the toggleable Inter dot/dash gap, Inter letter gap, and Inter word gap (with their own durations), so you can experiment with non-standard configurations
• Text to encode: type any text. Unknown characters are skipped
• Generate rhythm: encodes the text and shows the Morse translation, the resulting 0/1 rhythm, and # hits / duration. Group chunks the rhythm display visually
• Send rhythm to main: replaces the Home page rhythm with this one