Always loved this film and its predecessor - but haven´t seen it in ages. And strangely forgot about the scores.
Now, by chance, I discovered that Schifrin´s score to "The Four Musketeers" on iTunes - and Legrand´s score on one CD with his "Robin and Marian"-score.
Just imported "The Four Musketeers" into iTunes and gave it a spin. The sound quality for track 5 "Breakfast at the Bastion" is pretty awful. Sounds like mono/fake stereo or it was pulled from really poor source material. In general the sound quality for this release fluctuates, but this cue is the most noticeable.