From a contemporaneous review
“This year’s I.S.C.M. Festival was held in June in Baden-Baden at the studio of the Südwestfunk, an ultra-modern concert hall situated a little outside the town, surrounded by majestic woods and with a lovely view of soft hills. In such surroundings one’s aesthetic sense tends to expect a fair measure beauty from the music one has come to hear. There was, however, more for the eye than for the ear, and with a few notable exceptions, the standard of works presented was of a deplorably low level.
“On the whole, this year’s Festival, of which sixty per cent of the music performed was dodecaphonic, gave a somewhat one-sided and highly coloured picture of the music that is being written to-day. Novelty of idiom sensationalism can be driven too far.”
— Franz Reizenstein, “The I. S. C. M. Festival at Baden-Baden,”
Tempo, No. 36 (Cambridge University Press, Summer 1955), p. 8.