# Sound Analysis and Synthesis

## Documentation for package ‘seewave’ version 2.2.3

- DESCRIPTION file.
- User guides, package vignettes and other documentation.
- Code demos. Use demo() to run them.
- Package NEWS.

## Help Pages

A B C D E F G H I K L M N O P Q R S T W Z

seewave-package | Sound analysis and synthesis

## -- A --

ACI | Acoustic Complexity Index
acoustat | Statistics on time and frequency STFT contours
addsilw | Add or insert a silence section
afilter | Amplitude filter
akamatsu | Water tank minimum resonant and cutoff frequencies
ama | Amplitude modulation analysis of a time wave
AR | Acoustic Richness index
attenuation | Generate sound intensity attenuation data
audiomoth | Reading and interpreting Audiomoth file name
audiomoth.rename | Rename audiomoth files in a readable format
autoc | Short-term autocorrelation of a time wave

## -- B --

beep | Beep sound
bwfilter | Butterworth frequency filter

## -- C --

ccoh | Continuous coherence function between two time waves
ceps | Cepstrum or real cepstrum
cepstro | 2D-cepstrogram of a time wave
coh | Coherence between two time waves
combfilter | Comb filter
convSPL | Convert sound pressure level in other units
corenv | Cross-correlation between two time wave envelopes
corspec | Cross-correlation between two frequency spectra
covspectro | Covariance between two spectrograms
crest | Crest factor and visualization
csh | Continuous spectral entropy
cutspec | Cut a frequency spectrum
cutw | Cut a section of a time wave

## -- D --

dBscale | dB colour scale for a spectrogram display
dBweight | dB weightings
deletew | Delete a section of a time wave
dfreq | Dominant frequency of a time wave
diffcumspec | Difference between two cumulative frequency spectra
diffenv | Difference between two amplitude envelopes
diffspec | Difference between two frequency spectra
diffwave | Difference between two time waves
discrets | Time series discretisation
drawenv | Draw the amplitude envelope of a time wave
drawfilter | Draw the amplitude profile of a frequency filter
duration | Duration of a time wave
dynoscillo | Dynamic oscillogram
dynspec | Dynamic sliding spectrum
dynspectro | Dynamic sliding spectrogramn

## -- E --

echo | Echo generator
env | Amplitude envelope of a time wave
export | Export sound data

## -- F --

fadew | Fade in and fade out of a time wave
fbands | Frequency bands plot
fdoppler | Doppler effect
ffilter | Frequency filter
field | Near field and far field limits
fir | Finite Impulse Response filter
fma | Frequency modulation analysis
fpeaks | Frequency peak detection
ftwindow | Fourier transform windows
fund | Fundamental frequency track

## -- G --

gammatone | Gammatone filter
ggspectro | 2D-spectrogram of a time wave using ggplot2

## -- H --

H | Total entropy
hilbert | Hilbert transform and analytic signal

## -- I --

ifreq | Instantaneous frequency
istft | Inverse of the short-term Fourier transform
itakura.dist | Itakuro-Saito distance

## -- K --

kl.dist | Kullback-Leibler distance
ks.dist | Kolmogorov-Smirnov distance

## -- L --

lfs | Linear Frequency Shift
listen | Play a sound wave
localpeaks | Local maximum frequency peak detection
logspec.dist | Log-spectral distance
lts | Long-term spectrogram

## -- M --

M | Median of the amplitude envelope
meandB | Mean of dB values
meanspec | Mean frequency spectrum of a time wave
mel | Hertz / Mel conversion
melfilterbank | Mel-filter bank for MFCC computation
micsens | Microphone sensitivity and conversion
moredB | Addition of dB values
mutew | Replace time wave data by 0 values

## -- N --

NDSI | Normalized Difference Soundscape Index
noisew | Generate noise
notefreq | Frequency of a muscical note

## -- O --

octaves | Octave values
orni | Song of the cicada Cicada orni
oscillo | Show a time wave as an oscillogram
oscilloEQ | Oscillogram 'equalizer'
oscilloST | Show a stereo time wave as oscillograms

## -- P --

pastew | Paste a time wave to another one
peewit | Song of the bird Vanellus vanellus
pellucens | Calling song of the tree cricket Oecanthus pellucens
phaseplot | Phase-phase 2D or 3D plot of a time wave
phaseplot2 | Phase-phase 2D plot of a time wave
playlist | Play a list of sound files
preemphasis | Pre-emphasis speech filter
pulsew | Generate rectangle pulse

## -- Q --

Q | Resonance quality factor of a frequency spectrum

## -- R --

read.audacity | Audacity audio markers import
repw | Repeat a time wave
resamp | Resample a time wave
revw | Time reverse of a time wave
rmam | Remove the amplitude modulations of a time wave
rmnoise | Remove noise
rmoffset | Remove the offset of a time wave
rms | Root Mean Square
roughness | Roughness or total curvature
rugo | Rugosity of a time wave

## -- S --

savewav | Save a .wav file
SAX | Symbolic Aggregate approXimation
scd | Soundcape chord diagram
sddB | Standard deviation of dB values
seedata | A quick look at quantitative data
seewave | Sound analysis and synthesis
setenv | Set the amplitude envelope of a time wave to another one
sfm | Spectral Flatness Measure
sh | Shannon and Renyi spectral entropy
sheep | Sheep bleat
simspec | Similarity between two frequency spectra
smoothw | A function to tentativily smooth a time wave
songmeter | Reading and interpreting SongMeter file name
songmeterdiag | Songmeter file diagnostics and diagram
soundscapespec | Soundscape frequency spectrum of a time wave
sox | Calls SoX
spec | Frequency spectrum of a time wave
specflux | Spectral flux
specprop | Spectral properties
spectro | 2D-spectrogram of a time wave
spectro3D | 3D-spectrogram of a time wave
squarefilter | Frequency square filter
symba | Symbol analysis of a numeric (time) series
synth | Synthesis of time wave (additive model)
synth2 | Synthesis of time wave (tonal model)

## -- T --

TFSD | normalized Time and Frequency Second Derivative
th | Temporal entropy
tico | Song of the bird Zonotrichia capensis
timelapse | Time lapse
timer | Time measurements of a time wave
TKEO | Teager-Kaiser energy tracking operator
tkeo | Teager-Kaiser energy tracking operator

## -- W --

wasp | WAve length and SPeed of sound
wav2dBSPL | Convert wave amplitude to instantaneous sound pressure level (dB SPL)
wav2flac | wav-flac file conversion
wav2leq | Convert wave amplitude to equivalent continuous sound pressure level (Leq)
wf | Waterfall display
write.audacity | Audacity audio markers export

## -- Z --

zapsilw | Zap silence periods of a time wave
zc | Instantaneous frequency of a time wave by zero-crossing
zcr | Zero-crossing rate