Sounds Unheard Of! (subtitled Percussion & Guitar!! Shelly Manne!! and Jack Marshall!!! In a Spectacular Demonstration of Musical Daring and Brilliant New Stereo!!) is an album by drummer Shelly Manne and guitarist Jack Marshall recorded in early 1962 and released on the Contemporary label. The album was produced as a stereo test and demonstration record to be used by hi-fi enthusiasts to test the performance of their audio systems. The two men followed this with another release in 1966 on the Capitol label titled Sounds!.