[Flac] music complexity

[Harry Sack]

hi,

Is it true the flac encoder can compress music better when the
complexity of the music is low?
I'm compressing some tunes of old MS DOS games (pc speaker, sound
blaster 16 OPL3 chip music) and I saw a *huge* compression ratio (some
files where only 1/3th of the original file in filesize after
compressing to flac), so I was wondering if less complex music always
means better compression.

thx in advance,
Harry