180 Gram Limited Edition Classic LP - *(*) AllMusic *Penguin Guide to Jazz. The album presented here, originally issued as Walkin' (Prestige PRLP-7076), is a key work in Miles Davis' discography. It contains the product of two rather different sessions. The first date (which is actually the second chronologically) yielded just two tracks, although they were long enough to fill up one side of an LP. The other session included Miles' classic composition "Solar". Curiously, although it would become a jazz standard, Miles never recorded it again.