CORE (core.py)
Pattern                  - Abstract superclass of all pattern generators.
PConstant                - Returns a fixed value.
PRef                     - Contains a reference to another pattern, which can be replaced dynamically.
PFunc                    - Returns the value generated by a function.
PArrayIndex              - Request a specified index from an array.
PDict                    - Construct a pattern from a dict of arrays, or an array of dicts.
PDictKey                 - Request a specified key from a dictionary.
PConcatenate             - Concatenate the output of multiple sequences.
PAbs                     - Absolute value of `input`
PInt                     - Integer value of `input`
PAdd                     - Add elements of two patterns (shorthand: patternA + patternB)
PSub                     - Subtract elements of two patterns (shorthand: patternA - patternB)
PMul                     - Multiply elements of two patterns (shorthand: patternA * patternB)
PDiv                     - Divide elements of two patterns (shorthand: patternA / patternB)
PFloorDiv                - Integer division (shorthand: patternA // patternB)
PMod                     - Modulo elements of two patterns (shorthand: patternA % patternB)
PPow                     - One pattern to the power of another (shorthand: patternA ** patternB)
PLShift                  - Binary left-shift (shorthand: patternA << patternB)
PRShift                  - Binary right-shift (shorthand: patternA << patternB)
PEqual                   - Return 1 if a == b, 0 otherwise (shorthand: patternA == patternB)
PGreaterThanOrEqual      - Return 1 if a != b, 0 otherwise (shorthand: patternA != patternB)
PGreaterThan             - Return 1 if a > b, 0 otherwise (shorthand: patternA > patternB)
PGreaterThanOrEqual      - Return 1 if a >= b, 0 otherwise (shorthand: patternA >= patternB)
PLessThan                - Return 1 if a < b, 0 otherwise (shorthand: patternA < patternB)
PLessThanOrEqual         - Return 1 if a <= b, 0 otherwise (shorthand: patternA <= patternB)

SCALAR (scalar.py)
PChanged                 - Outputs a 1 if the value of the input pattern has changed,
PDiff                    - Outputs the difference between the current and previous values of an input pattern
PSkipIf                  - If `skip` is false, returns `input`; otherwise, returns None.
PNormalise               - Adaptively normalise `input` to [0..1] over a linear scale.
PMap                     - Apply an arbitrary function to an input pattern.
PMapEnumerated           - Apply arbitrary function to input, passing a counter.
PScaleLinLin             - Map `input` from linear range [a,b] to linear range [c,d].
PScaleLinExp             - Map `input` from linear range [a,b] to exponential range [c,d].
PRound                   - Round `input` to N decimal places.
PScalar                  - Reduce tuples and lists into single scalar values,
PWrap                    - Wrap input note values within <min>, <max>.
PIndexOf                 - Find index of items from `pattern` in <list>

SEQUENCE (sequence.py)
PSeries                  - Arithmetic series, beginning at `start`, increment by `step`
PRange                   - Similar to PSeries, but specify a max/step value.
PGeom                    - Geometric series, beginning at `start`, multiplied by `step`
PImpulse                 - Outputs a 1 every <period> events, otherwise 0.
PLoop                    - Repeats a finite `pattern` for `n` repeats.
PPingPong                - Ping-pong input pattern back and forth N times.
PCreep                   - Loop `length`-note segment, progressing `creep` notes after `repeats` repeats.
PStutter                 - Play each note of `pattern` `count` times.
PSubsequence             - Returns a finite subsequence of an input pattern.
PReverse                 - Reverses a finite sequence.
PReset                   - Resets `pattern` whenever `trigger` is true
PCounter                 - Increments a counter by 1 for each zero-crossing in `trigger`.
PCollapse                - Skip over any rests in `input`
PNoRepeats               - Skip over repeated values in `input`
PPad                     - Pad `pattern` with rests until it reaches length `length`.
PPadToMultiple           - Pad `pattern` with rests until its length is divisible by `multiple`.
PArpeggiator             - Arpeggiator.
PEuclidean               - Generate Euclidean rhythms.
PPermut                  - Generate every permutation of `count` input items.
PPatternGeneratorAction  - Each time its pattern is exhausted, request a new pattern by calling <fn>.
PSequenceAction          - Iterate over an array, perform a function, and repeat.

CHANCE (chance.py)
PWhite                   - White noise between `min` and `max`.
PBrown                   - Brownian noise.
PCoin                    - Coin toss, returning either 0 or 1 given some `probability`.
PWalk                    - Random walk around list.
PChoice                  - Pick a random element from `values`, weighted by optional `weights`.
PSample                  - Pick multiple random elements from `values`, weighted by optional `weights`,
PShuffle                 - Shuffled list.
PShuffleInput            - Every `n` steps, take `n` values from `pattern` and reorder.
PSkip                    - Skip events with some probability, 1 - `play`.
PFlipFlop                - flip a binary bit with some probability.
PSwitchOne               - Capture `length` input values; loop, repeatedly switching two adjacent values.
PRandomExponential       - Random uniform on exponential curve between `min` and `max`,
PRandomImpulseSequence   - Random sequence of impulses with probability `probability`.

TONAL (tonal.py)
PDegree                  - Map scale index <degree> to MIDI notes in <scale>.
PFilterByKey             - Filter notes based on their presence in <key>.
PNearestNoteInKey        - Return the nearest note in <key>.
PMidiNoteToFrequency     - Map MIDI note to frequency value.

STATIC (static.py)
PGlobals                 - Static global value identified by a string.
PCurrentTime             - Returns the position (in beats) of the current timeline.

FADE (fade.py)
PFadeNotewise            - Fade a pattern in/out by introducing notes at a gradual rate.
PFadeNotewiseRandom      - Fade a pattern in/out by gradually introducing random notes.

MARKOV (markov.py)
PMarkov                  - First-order Markov chain generator.

LSYSTEM (lsystem.py)
PLSystem                 - integer sequence derived from Lindenmayer systems

WARP (warp.py)
PWInterpolate            - Requests a new target warp value from `pattern` every `length` beats
PWSine                   - Sinosoidal warp, period `length` beats, amplitude +/-<amp>.
PWRallantando            - Exponential deceleration to <amp> times the current tempo over `length` beats.