Function reference • hrep

Types Types provide different ways of representing chords.
`type()`	Type
`represent()`	Represent
`representations()`	Representations
`fr_chord()` `is.fr_chord()`	Frequency chord
`.milne_pc_spectrum()`	Constructor function for Milne pitch-class spectrum
`milne_pc_spectrum()`	Milne pitch-class spectrum
`pc_chord()`	Pitch-class chord
`pc_chord_type()` `pi_chord_type(<pi_chord>)` `pi_chord_type(<smooth_spectrum>)` `pi_chord_type(<sparse_spectrum>)`	Pitch-class chord type
`pc_set()`	Pitch-class set
`pc_set_norm_order()`	Pitch-class set (normal order)
`pc_set_type()` `transposition(<pc_set_type>)`	Pitch-class set type
`pi_chord()`	Pitch chord
`pi_chord_type()`	Pitch chord type
`smooth_pc_spectrum()`	Smooth pitch-class spectrum
`smooth_pi_spectrum()`	Smooth pitch spectrum
`sparse_fr_spectrum()`	Sparse frequency spectrum
`sparse_pc_spectrum()`	Sparse pitch-class spectrum
`sparse_pi_spectrum()`	Sparse pitch spectrum
`.wave()`	wave constructor
`wave()`	Wave
Chord qualities Functions for decoding chord qualities from textual labels.
`get_chord_qualities_df()`	Get chord qualities
`register_chord_quality()`	Register chord quality
`initialise_chord_qualities()`	Initialise chord qualities database
`decode_chord_quality()`	Decode chord quality
Alphabets Several types have alphabets defined to allow integer encodings.
`pc_chord_alphabet`	Pitch-class chord alphabet
`pc_set_alphabet`	Pitch-class set alphabet
`pc_chord_id_to_pc_set_id_map`	pc_chord to pc_set map
`alphabet_size()`	Alphabet size
`list_chords()`	List chords
`map_pc_chord_id_to_pc_set_id()`	Map pitch-class chords to pitch-class sets
Sequences and corpora Chord sequences are expressed as objects of class `vec`; corpora are expressed as objects of class `corpus`.
`corpus()` `is.corpus()`	Corpus
`vec()`	Vector
`coded_vec()`	Coded vector
`metadata()` `metadata<-`()	Metadata
`transform_symbols()`	Transform symbols
`num_elements()`	Number of elements
`num_sequences()`	Number of sequences
Encoding and decoding Sequences and corpora can be encoded into integer-based representations.
`decode()` `decode_pc_set()` `decode_pc_chord_type()` `decode_pc_chord()`	Decode
`encode()` `encode_pc_set()` `encode_pc_chord_type()` `encode_pc_chord()`	Encode
Viewing chords and chord sequences
`view()`	View
Synthesising audio
`play_sox()`	Play sound (sox)
`save_wav_sox()`	Save wav file (sox)
Properties For accessing properties of chords.
`get_bass_fr()`	Get bass frequency
`get_bass_pc()` `get_non_bass_pc(<default>)` `get_non_bass_pc(<pc_chord>)`	Get bass pitch class
`get_bass_pi()`	Get bass pitch
`get_non_bass_pc()`	Get non-bass pitch classes
Manipulating chords Manipulating properties of chords.
`combine_sparse_spectra()`	Combine sparse spectra
`edit_bass_pc()`	Edit bass pitch class
`tp()`	Transpose
Miscellaneous utilities Various utility functions.
`amplitude_to_dB()`	Convert amplitude to decibels
`ascending_pc_dist()`	Get the ascending distance between two pitch classes.
`cosine_similarity()`	Cosine similarity
`dB_to_amplitude()`	Convert decibels to amplitude
`expand_harmonics()`	Expand harmonics
`freq_to_midi()`	Convert frequencies to MIDI note numbers
`int_vec()` `as.numeric(<int_vec>)` `as.character(<int_vec>)`	Interval vector
`midi_to_freq()`	Convert MIDI note numbers to frequencies
`milne_pc_spec_dist()`	Milne's pitch-class spectral distance
`pc_dist()`	Get the distance between two pitch classes.
`pi_to_pc()`	Convert pitches to pitch classes
`sum_amplitudes()`	Sum amplitudes
`transform_y()`	Transform y values
Miscellaneous accessors
`x_unit()` `y_unit()` `lower()` `upper()` `low_eq()` `high_eq()` `label()` `x_lab()` `y_lab()` `freq()` `freq<-`() `pitch()` `pitch<-`() `pc()` `pc<-`() `amp()` `amp<-`() `transposition()` `sample_rate()`	Accessors
Class checking Checking classes of objects.
`is.chord()`	Is chord
`is.coded()`	Is an object coded?
`is.coded_vec()`	Type-checking for "coded_vec"
`is.equal_tempered()`	Check for equal temperament
`is.milne_pc_spectrum()`	Check for class "milne_pc_spectrum"
`is.smooth_pc_spectrum()`	Is smooth pitch-class spectrum
`is.smooth_pi_spectrum()`	Is smooth pitch spectrum
`is.sparse_fr_spectrum()`	Is sparse pitch-class spectrum
`is.sparse_pc_spectrum()`	Is sparse pitch-class spectrum
`is.sparse_pi_spectrum()`	Is sparse pitch spectrum
`is.pc_chord()`	Check for class "pc_chord"
`is.pc_set()`	Check for type "pc_set"
`is.pi_chord()`	Check for type "pi_chord"
`is.vec()`	Check for class "vec"

Reference

Types

Chord qualities

Alphabets

Sequences and corpora

Encoding and decoding

Viewing chords and chord sequences

Synthesising audio

Properties

Manipulating chords

Miscellaneous utilities

Miscellaneous accessors

Class checking