Audio Files
Download a zero-byte .M4A file, or one of about 1 KB, for QA. Neither file is a real document.
empty.m4a is 0 bytes. 1kb.m4a is 1,024 bytes of filler text. Both use the MPEG-4 Audio name.
Attach either file where your product asks for a .M4A file. Use the empty file for a zero-length check, and the 1 KB file for a small non-empty upload. The download names stay empty.m4a and 1kb.m4a.
empty.m4a is empty. 1kb.m4a is about 1 KB of filler text, not a real MPEG-4 Audio.
Most apps will report an empty or invalid MPEG-4 Audio. That is the point of the fixture.
Yes. Neither file has an executable payload.
Other samples in the same category.