Convert between pitches, chords, semitones and frequencies.
pitch_freq(notes, a4 = 440)
pitch_semitones(notes)
chord_freq(notes, a4 = 440)
chord_semitones(notes)
freq_pitch(
freq,
octaves = c("tick", "integer"),
accidentals = c("flat", "sharp"),
collapse = FALSE,
a4 = 440
)
freq_semitones(freq, a4 = 440)
semitone_pitch(
semitones,
octaves = c("tick", "integer"),
accidentals = c("flat", "sharp"),
collapse = FALSE
)
semitone_freq(semitones, a4 = 440)character, noteworthy string, space-delimited or vector of individual entries. See details.
the fixed frequency of the A above middle C, typically 440 Hz.
numeric vector, frequencies in Hz.
NULL or character, "tick" or "integer" octave numbering
in result.
NULL or character, represent accidentals, "flat" or
"sharp".
logical, collapse result into a single string. key and
style.
integer values of pitches.
integer, numeric or noteworthy vector
Frequencies are in Hertz. Values are based on the 12-tone equal-tempered
scale. When converting an arbitrary frequency to pitch, it is rounded to the
nearest pitch.
pitch_freq() and pitch_semitones() strictly accept single notes in
noteworthy strings and return numeric vectors.
chord_freq() and chord_semitones() accept any noteworthy string and
always return a list. These are provided so that all functions are type-safe.
See examples.
x <- "a e4 a4 e5 a5"
y <- pitch_freq(x)
y
#> [1] 220.0000 329.6276 440.0000 659.2551 880.0000
freq_semitones(y)
#> [1] 57 64 69 76 81
freq_pitch(y)
#> <Noteworthy string>
#> Format: vectorized time
#> Values: a e' a' e'' a''
identical(as_noteworthy(x), freq_pitch(y, "integer", collapse = TRUE))
#> [1] TRUE
s <- pitch_semitones(x)
s
#> [1] 57 64 69 76 81
semitone_pitch(s)
#> <Noteworthy string>
#> Format: vectorized time
#> Values: a e' a' e'' a''
x <- "a, a,c#e"
chord_semitones(x)
#> $`a,`
#> [1] 45
#>
#> $`a,c#e`
#> [1] 45 49 52
#>
chord_freq(x)
#> $`a,`
#> [1] 110
#>
#> $`a,c#e`
#> [1] 110.0000 138.5913 164.8138
#>