Largo from Chavez - Toccata For Percussion
Here's an interesting find. Side one is conducted by Felix Slatkin who would go on to produce space age pop stuff including this excellent LP: Fantastic Percussion.
The vibe is a blend of moody classical with some subtle percussion that comes across as an attempt to create and market a record that might appeal to early concept/avant grade album buyers.
The sample above is band from side one.
Darius Milhaud: Concerto for percussion and small orchestra - Concert Arts Orchestra conducted by Felix Slatkin
Carlos Chavez: Toccata For Percussion - Concert Arts Orchestra conducted by Felix Slatkin
Bela Bartok: Music for string instruments, percussion and celesta - Los Angeles Chamber Symphony - Conducted by Harold Byrns