sound (version 1.1)

pitch: Pitch a Sample Object

Description

Change the pitch of a Sample object or a wav file.

Usage

pitch(s, semitones)

Arguments

s

a Sample object, or a string giving the name of a wav file.

semitones

a double giving the number of semitones to be pitched.

Value

• a Sample object.

Details

Pitching +12 semitones (+1 octave) means to double the frequencies. Negative values of semitones are used to lower the frequencies. Note that this transformation changes the actual data of the sample. Since pitching a sample is equivalent to playing it at a different speed, the length of the Sample object will also change.

Examples

s <- Sine(440,1)
# Now play it 12 semitones = 1 octave deeper,
# that is half the frequencies and twice the length,
# or played at half speed.
play(pitch(s,-12)) # is the same as...
play(Sine(220,2))