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Play a voice message that has been compressed using various formats. The original recording was made at 8000 Hz.

Now playing:

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The size of the file with determine how long it takes to upload the recording, and how much hard disk storage is required if you keep the recording on your server. Note that ADPCM is better at recording music than Speex. Speex is better at recording voice than ADPCM.

Compression Type
Format
Size Ratio  
Signed 16 bit (uncompressed)
s16
78,768
1:1
ADPCM
adpcm
20,540
4:1
Speex, quality 4.0
speex
6,462
12:1
Speex, quality 3.0
speex
5,527
14:1
Speex, quality 2.0
speex
4,745
17:1
Speex, quality 1.5
speex
4,417
18:1
Speex, quality 1.0
speex
4,132
19:1
Speex, quality 0.5
speex
3,267
24:1

For more information about compression formats, and instructions on how to select the compression format with ListenUp, please click here.

 

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