MSV

• Company: Sony
• Samples: http://samples.mplayerhq.hu/A-codecs/MSV/ or using the following google search [1]

MSV files are Sony's Memory Stick Compressed Voice format.

It looks like to come in two versions: the first one is called MSV (ADPCM) which is, unsurprisingly, according to Sony [2], a "special version of ADPCM".

The second version called MSV (LPEC) uses a proprietary Sony codec called Long-term Predicted Excitation Coding [3]. It looks this codec is also used in another file format, called Digital Voice File (extension .dvf).

File Format

The file is made of 1024 byte packets starting 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 ...)