It was playing in some haunted woods or something so it has an eerie sound. It is about largo or andante, and starts with four notes repeated over and over, played on low woodwinds- probably oboe. Every 4th beat on the off beat there is a two-note (descending half-step interval) violin "chirp," that is very high. As the song progresses, the woodwinds get higher and slightly faster. I`ve heard it elsewhere too. Wondering what it is.

Peter and the Wolf