



There was also a release of the quadraphonic version in the UK in fully discrete 4-channel form on the "Quad-8" format, a 4-channel variant of the stereo 8-track tape cartridge. The quadraphonic mix was released on LP in a matrix format compatible with standard stereo record players. "Atom Heart Mother" was the first Pink Floyd album to be specially mixed for 4-channel quadraphonic sound as well as conventional 2-channel stereo.
