| Filename extension | .act[1] |
|---|---|
| Developed by | Actions Semiconductor |
| Type of format | audio file |
| Standard(s) | most Chinese MP3 and MP4 players |
ACT is a lossy ADPCM 8 kbit/s compressed audio format recorded by most Chinese MP3 and MP4 players with a recording function, and voice recorders.
However, many models of recorder that use the ACT format do so only for their lowest-quality recording setting; if the quality setting is increased then a different format such as WAV is used instead (albeit at the expense of using up recorder memory more quickly).
There are different versions of ACT; files produced by later devices cannot as of June 2009[update] be read by any free standard audio player and converter software, only by the supplied MP3 utilities.
Contents |
Devices which record in this format are usually supplied with an ACT to WAV converter program that runs under Microsoft Windows; the converter usually used can be downloaded as part of MP3 Player Utilities.
Act files can be converted by numerous programs. See the external links below.
One command-line utility that is able to read .act files is SoX. A command line that converts an .act file to another file format is the following:
sox -i -r8k -tima -c1 infile.act outfile
Download Windows version of amv-codec-tools and run it under Wine:
wine amv-ffmpeg.exe -f act -i REC05.act REC05.wav