SpectrogramArray
SpectrogramArray[list]
returns the spectrogram data of list.
SpectrogramArray[list,n]
uses partitions of length n.
SpectrogramArray[list,n,d]
uses partitions with offset d.
SpectrogramArray[list,n,d,wfun]
applies a smoothing window wfun to each partition.
SpectrogramArray[list,n,d,wfun,m]
pads partitions with zeros to length m prior to the computation of the transform.
SpectrogramArray[audio,…]
returns spectrogram data of audio.
SpectrogramArray[video]
returns the spectrogram data of the first audio track in video.
Details and Options
- SpectrogramArray[list] returns the discrete Fourier transform (DFT) of partitions of list, also known as short-time Fourier transform (STFT).
- Plot the spectrogram using Spectrogram.
- SpectrogramArray[list] uses partitions of length
and offset 
, where 
is Length[list]. - The partition length n and offset d can be expressed as an integer number (interpreted as number of samples) or as time or sample quantities.
- If necessary, fixed padding is used on the right to make all the partitions the same size.
- In SpectrogramArray[list,n,d,wfun], the smoothing window wfun can be specified using a window function that will be sampled between
and 
or a list of length n. The default window is DirichletWindow, which effectively does no smoothing. - SpectrogramArray works with numeric lists as well as Audio and Sound objects.
- For multichannel sound objects, the spectrogram is computed over the sum of all channels.
- SpectrogramArray accepts the FourierParameters option. The default setting is FourierParameters->{1,-1}.
Examples
open all close allBasic Examples (2)
Scope (2)
Magnitude spectrum of a single partition:
Plot of the magnitude of the SpectrogramArray data:
Apply a smoothing window function:
Applications (2)
Properties & Relations (2)
Fourier of partitions of lists is equivalent to SpectrogramArray:
Compute the inverse of spectrogram of non-overlapping partitions:
Text
Wolfram Research (2012), SpectrogramArray, Wolfram Language function, https://reference.wolfram.com/language/ref/SpectrogramArray.html (updated 2024).
CMS
Wolfram Language. 2012. "SpectrogramArray." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2024. https://reference.wolfram.com/language/ref/SpectrogramArray.html.
APA
Wolfram Language. (2012). SpectrogramArray. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/SpectrogramArray.html