The archive likely contains two of Chopin's most essential Polish dance forms:
: Stands for Exact Audio Copy , the industry-standard software used to "rip" CDs with 100% accuracy.
: Indicates the audio is in Free Lossless Audio Codec format, providing CD-quality sound without any loss of data.
The name follows a standard naming convention used in online music sharing communities: : Short for Cho pin Pol onaises and Maz urkas.