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AudioReplace
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AudioReplace

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AudioReplace[audio,{t1,t2}new]

replaces the audio signal between t1 and t2 with the new signal new.

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AudioReplace[audio,{{t11,t12},…}new]

replaces multiple intervals with the same audio new.

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AudioReplace[audio,{{t11,t12}new1,…}]

replaces multiple intervals.

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AudioReplace[audio,{t1,t2}new,fitting]

uses the specified fitting method.

Details

  • AudioReplace can be used to replace a part of an audio signal with a new signal. Typically, the duration of the whole audio stays unchanged.
  • The time t can be any of the following:
  • ttime given in seconds
    Quantity[t,"unit"]time given in "unit" compatible with seconds
    Quantity[t,"Samples"]time given as number of samples
  • The fitting method specifies how new replaces the {t1,t2} interval. Possible settings are:
  • "Fill"pad or trim new to duration t2-t1 (default)
    "Insert"remove audio from t1 to t2 and insert new at t1
    "Stretch"replace {t1,t2} with the time-stretched version of new

Examples

open allclose all

Basic Examples  (1)Summary of the most common use cases

Replace the interval between .5 and 1 seconds with a sinusoid:

In[2]:=2
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https://wolfram.com/xid/09by6qbxu-dy73ok
In[3]:=3
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https://wolfram.com/xid/09by6qbxu-8pruc4
Out[3]=3

Scope  (3)Survey of the scope of standard use cases

Basic Uses  (2)

Replace different intervals with the same signal:

In[2]:=2
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https://wolfram.com/xid/09by6qbxu-7idghn
In[3]:=3
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https://wolfram.com/xid/09by6qbxu-7cww4r
Out[3]=3

Insert different signals at different times:

In[1]:=1
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https://wolfram.com/xid/09by6qbxu-1jq2u6
In[2]:=2
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https://wolfram.com/xid/09by6qbxu-xynmpz
Out[2]=2

Fitting  (1)

Use the fitting to control the behavior of the replacement signal:

In[1]:=1
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https://wolfram.com/xid/09by6qbxu-snic3g
In[2]:=2
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https://wolfram.com/xid/09by6qbxu-nuznhq
Out[2]=2
In[4]:=4
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https://wolfram.com/xid/09by6qbxu-0dkdp2

By default, the replacement audio is trimmed or padded to the specified length:

In[5]:=5
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https://wolfram.com/xid/09by6qbxu-3uyw84
Out[5]=5

The duration of the input signal stays the same:

In[5]:=5
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https://wolfram.com/xid/09by6qbxu-piwnl4
Out[5]=5

Use "Insert" to avoid any trimming or padding of the replacement audio:

In[6]:=6
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https://wolfram.com/xid/09by6qbxu-5dpltn
Out[6]=6

The duration changes if the duration of the replacement is different from the interval:

In[7]:=7
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https://wolfram.com/xid/09by6qbxu-zoa40u
Out[7]=7

Use "Stretch" to time stretch the replacement audio to the desired duration:

In[7]:=7
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https://wolfram.com/xid/09by6qbxu-x10k9g
Out[7]=7

The duration of the input signal does not change:

In[9]:=9
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https://wolfram.com/xid/09by6qbxu-jytdnx
Out[9]=9

Applications  (3)Sample problems that can be solved with this function

Replace the quiet parts of a recording with silence:

In[1]:=1
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https://wolfram.com/xid/09by6qbxu-6ylmr9
Out[1]=1

Find the quiet intervals:

In[2]:=2
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https://wolfram.com/xid/09by6qbxu-q1ws3h
Out[2]=2

Replace the selected intervals with silence:

In[3]:=3
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https://wolfram.com/xid/09by6qbxu-2vzcs6
Out[3]=3
In[4]:=4
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https://wolfram.com/xid/09by6qbxu-472q6f
Out[4]=4

Replace parts of a recording with a new audio signal:

In[1]:=1
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https://wolfram.com/xid/09by6qbxu-rnu1ej
Out[1]=1

Find the intervals with a nonzero amplitude and the fundamental frequency in a specified range:

In[2]:=2
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https://wolfram.com/xid/09by6qbxu-2sicoq
Out[2]=2

Display the resulting intervals:

In[3]:=3
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https://wolfram.com/xid/09by6qbxu-7uvf6p
Out[3]=3

Prepare the replacement audio:

In[4]:=4
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https://wolfram.com/xid/09by6qbxu-poktw5

Replace the selected intervals with the replacement audio:

In[5]:=5
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https://wolfram.com/xid/09by6qbxu-rmlzdp
Out[5]=5
In[6]:=6
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https://wolfram.com/xid/09by6qbxu-m7tb2n
Out[6]=6

Correct the pitch of parts of a recording:

In[1]:=1
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https://wolfram.com/xid/09by6qbxu-qqf7qr
Out[1]=1

Find the intervals with a nonzero amplitude and the fundamental frequency in a specified range:

In[2]:=2
✖
https://wolfram.com/xid/09by6qbxu-orcs29
Out[2]=2
In[3]:=3
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https://wolfram.com/xid/09by6qbxu-fbkk6r
Out[3]=3

Define the target frequencies:

In[4]:=4
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https://wolfram.com/xid/09by6qbxu-oi96cy

Define the pitch-shifting algorithm:

In[5]:=5
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https://wolfram.com/xid/09by6qbxu-jmfc00

Compute the replacements:

In[6]:=6
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https://wolfram.com/xid/09by6qbxu-tuka6o

Compute the result:

In[7]:=7
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https://wolfram.com/xid/09by6qbxu-3mphnf
Out[7]=7
In[8]:=8
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https://wolfram.com/xid/09by6qbxu-4hslq
Out[8]=8
Wolfram Research (2017), AudioReplace, Wolfram Language function, https://reference.wolfram.com/language/ref/AudioReplace.html.
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Wolfram Research (2017), AudioReplace, Wolfram Language function, https://reference.wolfram.com/language/ref/AudioReplace.html.

Text

Wolfram Research (2017), AudioReplace, Wolfram Language function, https://reference.wolfram.com/language/ref/AudioReplace.html.

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Wolfram Research (2017), AudioReplace, Wolfram Language function, https://reference.wolfram.com/language/ref/AudioReplace.html.

CMS

Wolfram Language. 2017. "AudioReplace." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/AudioReplace.html.

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Wolfram Language. 2017. "AudioReplace." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/AudioReplace.html.

APA

Wolfram Language. (2017). AudioReplace. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/AudioReplace.html

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Wolfram Language. (2017). AudioReplace. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/AudioReplace.html

BibTeX

@misc{reference.wolfram_2025_audioreplace, author="Wolfram Research", title="{AudioReplace}", year="2017", howpublished="\url{https://reference.wolfram.com/language/ref/AudioReplace.html}", note=[Accessed: 26-March-2025 ]}

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@misc{reference.wolfram_2025_audioreplace, author="Wolfram Research", title="{AudioReplace}", year="2017", howpublished="\url{https://reference.wolfram.com/language/ref/AudioReplace.html}", note=[Accessed: 26-March-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_audioreplace, organization={Wolfram Research}, title={AudioReplace}, year={2017}, url={https://reference.wolfram.com/language/ref/AudioReplace.html}, note=[Accessed: 26-March-2025 ]}

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@online{reference.wolfram_2025_audioreplace, organization={Wolfram Research}, title={AudioReplace}, year={2017}, url={https://reference.wolfram.com/language/ref/AudioReplace.html}, note=[Accessed: 26-March-2025 ]}