Need for Speed: Underground Audio file
application/octet-stream
Magic Bytes
Offset: 0
53 43 4D 49
The AST file format is a proprietary audio container developed by Electronic Arts for the Need for Speed: Underground video game. It functions as an archive for background music, voice acting, and sound effects to facilitate rapid data retrieval during software execution. This legacy format is inherently safe for users but remains largely obsolete, requiring specialized third-party tools or dedicated plugins for access outside the original game environment.
Validation Code
How to validate .ast files in Python
Python
def is_ast(file_path: str) -> bool:
"""Check if file is a valid AST by magic bytes."""
signature = bytes([0x53, 0x43, 0x4D, 0x49])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .ast files in Node.js
Node.js
function isAST(buffer: Buffer): boolean {
const signature = Buffer.from([0x53, 0x43, 0x4D, 0x49]);
return buffer.subarray(0, 4).equals(signature);
}
Go
func IsAST(data []byte) bool {
signature := []byte{0x53, 0x43, 0x4D, 0x49}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
GET
/api/v1/ast
curl https://filesignature.org/api/v1/ast