MEMBERS OF THE WESTDEUTSCHER RUNDFUNK CHORUS & STUDIO CHOIR FOR NEW MUSIC, COLOGNE supervised by KARLHEINZ STOCKHAUSEN Mikrophonie I / Mikrophonie II (1967 UK Stereo LP, front laminated picture sleeve with liner notes from the composer & <-STEREO-> sticker on the back. Recorded for tam-tam, two microphones & two filters, & the second part for twelve singers, four ring modulators & Hammond organ. The sleeve shows just a little light shelfwear with a bit of edge scuffing & the vinylis flawless)