noted on its back cover that either side could be enjoyed in stereo at any playing speed (from 45 rpm to rpm) depending on the effect desired by the person playing the record. Microgrooved 78s A small number of 78 rpm microgroove vinyl recordings have been issued by smaller and underground performers, mainly as novelty items, from the 1970s to the present. In 2006, the Belfast singer Duke Special released a number of ten inch EPs in 78 rpm. A series of 78 rpm microgroove records was issued by the "Audiophile" label during the early LP era. They were supposed to provide higher quality sound than 33 rpm by virtue of their faster rotation speed combined while also providing significantly longer playing time than standard groove 78 rpm records. Unusual holes The vast majority of records used a standard small spindle hole slightly more than in diameter. The only common exception to this is the 7-inch 45 rpm record, which was designed with a center hole slightly more than in diameter both for convenience in handling and to accommodate a very fast record-changing mechanism contained inside a correspondingly large spindle, as implemented in RCA Victor's early stand-alone "45" players. The spindle and any records stacked on it rotated with the turntable, so that each waiting disc was already up to speed before it dropped. Large mechanized spindle adaptors were supplied with most multi-speed automatic record changers sold in the 1950s and 1960s, but they were not as fast and efficient. The large hole also facilitates use in jukeboxes, which mechanically place the "45" onto a turntable with a conical spindle having a matching diameter at its base, making the placement operation easier, safer, and surer than it was with the small-diameter holes and spindles in 78 rpm jukeboxes. Most 7-inch records in the USA continue to be pressed with a large hole, requiring an adapter to be used on standard turntables. In other territories such as Europe, 7-inch records intended for home use have standard-sized holes. Many such 7-inch records had a center which could be easily snapped out, yielding a record with a larger hole to be used in jukeboxes or certain record-stacking players; this approach was common in the United Kingdom from the 1950s until the early 1980s, with standard, solid centres becoming gradually more common. Some 7-inch singles in the early-mid-1990s had large holes also, but this