CDDA Compression via FreeArc & Ext. Encoder

[MiY4Gi]

Are there any compression algorithms that can compress CDDA (Compact Disc Digital Audio) files (extension .DA)?

I specifically want to use the algorithm in conjunction with FreeArc, or does FreeArc already have an algorithm dedicated to this? TTA? I have a few disc images that contain these audio files, and the compression ratio (through Freearc) is weak compared to other disc images that don't contain such files.

Any advice?

[Mexxi]

I assume that those da-files are in fact uncompressed PCM audio files. Years ago, if you wanted to compress such files Winrar was the only useful solution among compressors, but recent Freearc versions seem to have special algorithms to deal with such content. I ran a quick test with an extracted flac I had lying around:

Jackson Brown - Somebody's Baby

Original:	46.341.500
Winrar 3.91-zip	44.101.368
7z 9.25		42.828.644
Winrar 3.91-rar	33.388.658
Flac 		30.749.181
Freearc	0.67	30.349.931
Monkey's Audio	29.690.088

Maximum compression was used in every case. So Freearc doesn't just beat other well used archivers, but also FLAC and it's pretty close to Monkey's Audio. So unless you want to resort to a special sound compressor Freearc is a great choice. Results may vary though, especially if these da-files aren't recognized as audio-files by Freearc.