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.
Recording studio A recording studio is a specialized facility for sound recording, mixing and audio production of instrumental or vocal musical performances, spoken words and other sounds. They range in size from a small in-home "project studio" large enough to record a single singer-guitarist, to a large building with space for a full orchestra of 100 or more musicians. Ideally both the recording and monitoring (listening and mixing) spaces are specially designed by an acoustician or audio engineer to achieve optimum acoustic properties (acoustic isolation or diffusion or absorption of reflected sound "echoes" that could otherwise interfere with the sound heard by the listener).