About: ACT (audio format)

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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. 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, typically WAV, is used, creating much larger files. There are different versions of ACT; files produced by later devices could not as of June 2009 be read by any free standard audio player and converter software, only by the supplied MP3 utilities.

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  • 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. 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, typically WAV, is used, creating much larger files. There are different versions of ACT; files produced by later devices could not as of June 2009 be read by any free standard audio player and converter software, only by the supplied MP3 utilities. (en)
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  • yes (en)
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  • ACT audio file (en)
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  • most Chinese MP3 and MP4 players (en)
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  • 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. 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, typically WAV, is used, creating much larger files. There are different versions of ACT; files produced by later devices could not as of June 2009 be read by any free standard audio player and converter software, only by the supplied MP3 utilities. (en)
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  • ACT (audio format) (en)
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