ARJZ is a compressed archive utility, primarily developed by Булат Зиганшин (Bulat Ziganshin, according to translation software). Its native file format is an incompatible variant of ARJ.
ARJZ's main features seem to be:
- Increase ARJ's 26K history window to 32K, like LHA's "lh6" method. Indicated by ARJ's minimum archiver version to extract field set to 50.
- Increase the history window to 64K, like LHA's "lh7" method. Indicated by ARJ's minimum archiver version to extract field set to 51.
- Some sort of audio-targeted compression technique, enabled by the
-t9option. Indicated by ARJ's "file type" field set to 9.
Like ARJ, an ARJZ file starts with bytes
0x60 0xea, and has
0x02 at offset 10.
Unlike ARJ, ARJZ files are observed to have
0x33 at offset 5 (meaning archiver version = 51).