What genre of music  did Loudest Whisper debut on a vinyl record format characterized by a speed of 33 ⁄ rpm, a 12 or 10 inch (30 or 25 cm) diameter, and use of the "microgroove" groove specification?
The Children of Lir (Loudest Whisper album) The Children of Lir is the debut album by Irish folk rock/progressive folk group Loudest Whisper. It is the studio adaption of the musical of the same name that was performed in Fermoy, Ireland in 1973. The album was released on LP record in Ireland by Polydor Records in 1974 in a limited edition of 500 copies.
Mini-LP A mini-LP or mini-album is a short vinyl record album or LP, usually retailing at a lower price than an album that would be considered full-length. It is distinct from an EP due to containing more tracks and a slightly longer running length. A mini-LP is not to be confused with the unique to Japan "mini LP sleeve" or "paper jacket" CD.