beat {soundgen}

Generate beat

Description

Generates percussive sounds from clicks through drum-like beats to sliding tones. The principle is to create a sine wave with rapid frequency modulation and to add a fade-out. No extra harmonics or formants are added. For this specific purpose, this is vastly faster and easier than to tinker with soundgen settings, especially since percussive syllables tend to be very short.

Usage

beat(
  nSyl = 10,
  sylLen = 200,
  pauseLen = 50,
  pitch = c(200, 10),
  samplingRate = 16000,
  fadeOut = TRUE,
  play = FALSE
)

Arguments

nSyl

the number of syllables to generate

sylLen

average duration of each syllable, ms

pauseLen

average duration of pauses between syllables, ms

pitch

fundamental frequency, Hz - a vector or data.frame(time = ..., value = ...)

samplingRate

sampling frequency, Hz

fadeOut

if TRUE, a linear fade-out is applied to the entire syllable

play

if TRUE, plays the synthesized sound using the default player on your system. If character, passed to play as the name of player to use, eg "aplay", "play", "vlc", etc. In case of errors, try setting another default player for play

Value

Returns a non-normalized waveform centered at zero.

See Also

soundgen generateNoise fart

Examples

playback = c(TRUE, FALSE)[2]
# a drum-like sound
s = beat(nSyl = 1, sylLen = 200,
         pitch = c(200, 100), play = playback)
# plot(s, type = 'l')

# a dry, muted drum
s = beat(nSyl = 1, sylLen = 200,
         pitch = c(200, 10), play = playback)

# sci-fi laser guns
s = beat(nSyl = 3, sylLen = 300,
         pitch = c(1000, 50), play = playback)

# machine guns
s = beat(nSyl = 10, sylLen = 10, pauseLen = 50,
         pitch = c(2300, 300), play = playback)