seewave (version 2.2.3)

octaves: Octave values

Description

This functions returns the frequency values of the octaves below and above a specific frequency

Usage

octaves(x, below = 3, above = 3)

Value

A numeric vector with the octave series in frequency (Hz or kHz depending on x unit).

Arguments

x

a numeric vector, frequency of the note in Hz or kHz.

below

the number of octaves below x.

above

the number of octaves above x.

Author

Jerome Sueur

See Also

notefreq

Examples

names <- c("C","D","E","F","G","A","B")
values <- c(261.63, 293.66, 329.64, 349.23, 392, 440, 493.88)
res <- sapply(values, FUN=octaves)/1000
op <- par(las=1,mfrow=c(2,1))
par(mar=c(0,4,1,1))
matplot(x=1:7, y=res, t="o", pch=names, xlab="",
    ylab="Frequency (kHz) [linear scale]", col=rainbow(7), xaxt="n")
par(mar=c(4.5,4,0,1))
matplot(x=1:7, y=res, t="o", pch=names, xlab="Octave",
    ylab="Frequency (kHz) [log scale]", col=rainbow(7), ylog=TRUE, log="y")
par(op)