AudioTrim

✖

AudioTrim[audio]

trims silence from the beginning and end of audio.

✖

AudioTrim[audio,t]

returns the first t seconds of audio.

✖

AudioTrim[audio,-t]

returns the last t seconds of audio.

✖

AudioTrim[audio,{t₁,t₂}]

returns audio starting at time t₁ and ending at time t₂ of audio.

✖

AudioTrim[audio,{{t₁₁,t₁₂},…}]

returns a list of audio for all given intervals {t_i1,t_i2}.

Details and Options

AudioTrim can be used to either extract interesting parts of a recording or remove uninteresting parts, e.g. silence.
Intervals with amplitudes below are assumed to be silent.
The time t can be any of the following:
t time given in seconds

Quantity[t,"unit"] time given in "unit" compatible with seconds

Quantity[t,"Samples"] time given as number of samples
AudioTrim takes a Padding option. See the reference page for AudioPad for possible settings.
In AudioTrim[audio,t], when t is longer than the duration of audio, by default no extra padding is introduced.

Examples

open allclose all

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

Import sound as an audio object:

In[2]:=2

✖

https://wolfram.com/xid/09by6p7dq-effx8q

Trim the silence at the beginning and end:

In[3]:=3

✖

https://wolfram.com/xid/09by6p7dq-xvdt7

Out[3]=3

Take the first 2 seconds:

In[4]:=4

✖

https://wolfram.com/xid/09by6p7dq-ize6xg

Out[4]=4

Take the last 2 seconds:

In[5]:=5

✖

https://wolfram.com/xid/09by6p7dq-hjefvp

Out[5]=5

Take from time 1.5 to 2.5:

In[6]:=6

✖

https://wolfram.com/xid/09by6p7dq-evw1hg

Out[6]=6

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

Specify the amount of trimming using a time Quantity:

In[2]:=2

✖

https://wolfram.com/xid/09by6p7dq-k3zyiy

Out[2]=2

Specify the amount of trimming using a number of samples:

In[1]:=1

✖

https://wolfram.com/xid/09by6p7dq-d3n9pv

Out[1]=1

Extract multiple intervals:

In[1]:=1

✖

https://wolfram.com/xid/09by6p7dq-godsfe

Out[1]=1

Applications (1)Sample problems that can be solved with this function

Extract intervals that satisfy a condition:

In[1]:=1

✖

https://wolfram.com/xid/09by6p7dq-fiewei

Out[1]=1

Use AudioIntervals to look for segments with high RMS amplitude:

In[2]:=2

✖

https://wolfram.com/xid/09by6p7dq-teqzin

Out[2]=2

Extract the intervals:

In[3]:=3

✖

https://wolfram.com/xid/09by6p7dq-nje5gv

Out[3]=3

Properties & Relations (1)Properties of the function, and connections to other functions

Partition an Audio object:

In[2]:=2

✖

https://wolfram.com/xid/09by6p7dq-46ijdn

Define the times for partitioning:

In[3]:=3

✖

https://wolfram.com/xid/09by6p7dq-s29lzd

Out[3]=3

Partition the audio object:

In[4]:=4

✖

https://wolfram.com/xid/09by6p7dq-h4syb9

Out[4]=4

Top