Gryphon were a British progressive rock band of the 1970s, best known for their unusual Medieval sound and instrumentation. Multi-instrumentalist Richard Harvey and his fellow Royal College of Music graduate Brian Gulland, a woodwind player, began the group as an all-acoustic ensemble that mixed traditional English folk music with medieval and Renaissance influences. Shortly after this, the duo was joined by guitarist Graeme Taylor and drummer/percussionist Dave Oberlé. After their self-titled debut, they expanded their sound to include electric guitars and keyboards as well as wind instruments, such as bassoons and krumhorns, not previously used in rock music. Gryphon's music often sounded as much like rural English folk or renaissance chansons as it did rock, at least on their early recordings. After their third album (Red Queen to Gryphon Three) and the subsequent tour as a supporting act for Yes, their instrumentation became more conventional and the use of non-standard instruments was reduced. Fans and critics generally regard Midnight Mushrumps and the all-instrumental Red Queen to Gryphon Three as their finest albums.