Sony Compressed Voice File magic bytes (.dvf)
.dvf file signature: 4D 53 5F 56 4F 49 43 45 | application/octet-stream
Sony Compressed Voice File (DVF) is a proprietary audio format developed by Sony for storing compressed voice recordings. It is used primarily in Sony voice recorders and dictation applications for speech notes, meeting recordings, and other low-bandwidth audio capture. The format is largely legacy and was common on older Sony hardware; it is generally considered safe, though support may be limited in modern media players and conversion tools.
Magic Bytes
Offset 0
4D 53 5F 56 4F 49 43 45
Sources: Gary Kessler
Validation Code
How to validate .dvf files in Python
def is_dvf(file_path: str) -> bool:
"""Check if file is a valid DVF by magic bytes."""
signature = bytes([0x4D, 0x53, 0x5F, 0x56, 0x4F, 0x49, 0x43, 0x45])
with open(file_path, "rb") as f:
return f.read(8) == signatureHow to validate .dvf files in Node.js
function isDVF(buffer: Buffer): boolean {
const signature = Buffer.from([0x4D, 0x53, 0x5F, 0x56, 0x4F, 0x49, 0x43, 0x45]);
return buffer.subarray(0, 8).equals(signature);
}How to validate .dvf files in Go
func IsDVF(data []byte) bool {
signature := []byte{0x4D, 0x53, 0x5F, 0x56, 0x4F, 0x49, 0x43, 0x45}
if len(data) < 8 {
return false
}
return bytes.Equal(data[:8], signature)
}API Endpoint
/api/v1/dvf
curl https://filesignature.org/api/v1/dvf
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .dvf file?
A .dvf file is a Sony Compressed Voice File. Sony Compressed Voice File (DVF) is a proprietary audio format developed by Sony for storing compressed voice recordings. It is used primarily in Sony voice recorders and dictation applications for speech notes, meeting recordings, and other low-bandwidth audio capture. The format is largely legacy and was common on older Sony hardware; it is generally considered safe, though support may be limited in modern media players and conversion tools.
What are the magic bytes for .dvf files?
The magic bytes for Sony Compressed Voice File (.dvf) files are 4D 53 5F 56 4F 49 43 45 at byte offset 0. These bytes identify the file format more reliably than the extension alone.
How do I validate a .dvf file?
To validate a .dvf file, read the first bytes of the file and compare them against the known magic bytes (4D 53 5F 56 4F 49 43 45) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .dvf files?
There is no officially registered MIME type for .dvf files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .dvf files?
Sony Compressed Voice File (.dvf) files are generally safe to open. They are classified as low risk because they primarily contain data rather than executable code. However, always ensure files come from a trusted source.