Conclusions
lMusikverein is a truly variable acoustics room
lThe Ballroom configuration exhibit reverberation times significantly larger than the Concert configuration, particularly at medium frequencies
lAlso G is significantly different
lHowever, C80 and LF do not change remarkably, ensuring good acoustical quality also in Ballroom configuration lThe storage room under the stalls is heavily insulated, hence it cannot have any effect lThe effect of the audience should be taken into account, particularly in Ballroom configuration, where it would be probably much larger than in Concert configuration.