MSV

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DVF (Digital Voice file): [filename].dvf

The DVF file is a sound file format used in recording messages on the Sony IC recorder models ICD-BP100/BP120.

ICS file (Sony IC recorder Sound file): [filename].ics

The ICS file is Sony's original sound file format used in recording messages on the IC recorder model ICD-R100.

MSV file (Memory Stick Voice file): [filename].msv

The MSV file is a sound file format used in recording messages on the Memory Stick IC recorder model ICD-MS1.


MSV files are Sony's Memory Stick Compressed Voice format. MSV files apparently come in 2 versions:

The first version is called MSV (ADPCM) which is, according to Sony, a "special version of ADPCM". <ref name="msv-adpcm">http://web.archive.org/web/20011208011229/http://www.sel.sony.com/SEL/consumer/icrecorder/flash/faq_capability.html#3</ref>

The second version is called MSV (LPEC) and uses a proprietary Sony codec called Long-term Predicted Excitation Coding. <ref name="msv-lpec">Wikipedia entry for LPEC</ref> This codec is apparently also used in another file format called Digital Voice File (extension .dvf).

File Format

The file is made of 1024-byte packets that each begin with:

 00 xbyte 00 0A 04 00 0E 30 81 cbyte

where xbyte is variable and cbyte increases every 4 packets except the first packet which starts with "MS_VOICE" (in the single file we have now ...)

<references/>