drum_shifter: Randomly shift notes in a MIDI sequence

In datadiarist/midiR:

Description

Takes sequence produced by drum_machine function and shifts notes in this sequence.

Usage

drum_shifter(seq_arg = NULL, shift = NULL, prob = 1,
  position = "all", track_apply = NULL, ...)

Arguments

seq_arg	The sequence to be modified. This should be the output of the drum_machine function.
shift	The note to shift to. This should be a capital letter for the note and a number for the octave (e.g "C3").
prob	(default = 1) The probability a note in the sequence will be shifted
position	(default = "all") The position of items in the sequence to be shifted
track_apply	An integer or vector of integers indicating which tracks (hh, kick, snare) to apply the shift to.

Value

A modified MIDI sequence to be entered into the create_midi function.

Examples

# Shifts notes in the first track (hh, or hi-hat) of drum sequence to "G#1" with .5 probability.

drum_machine(hh = 1:16, kick = seq(1, 16, by = 4), snare = c(5, 13)) %>%
drum_shifter(., shift = "G#1", prob = .5, track_apply = 1)

datadiarist/midiR documentation built on April 1, 2020, 4:29 a.m.