On 8/3/2013 2:20 PM, Donald Tait wrote:
>    The subway under Carnegie Hall can be heard in a number of recordings, including (famously) Mengelberg's 1928 Victor set of Ein Heldenleben with the New York Philharmonic.

Thr subway also features in several tracks of Pete Seeger's album "With 
Voices Together We Sing", recorded at Town Hall in 1955. It's mentioned 
in the liner notes.

Peace,
Paul