Alto saxophonist Lou Donaldson came out with Blues Walk, an album which the AllMusic Guide calls his "undisputed masterpiece," in 1958.
Donaldson was heavily influenced by Charlie Parker and this album, although still largely in a boppish vein, marked the point where he started to develop a distinctive style of his own, mainly by adding blues elements to his playing.
One of the album's highlights is a wonderful reading of the ballad Autumn Nocturne. The MP3 is taken from a DJ 45 that probably dates from around the time the original album was released.
If you're a newcomer to Donaldson's work, Blues Walk is the place to start. And fortunately the album is easily obtainable (and reasonably priced) in both CD and download formats.
To whet your appetite further, here's a video version of the title cut from Blues Walk. Excellent video and audio quality.