(source : Wikipédia)Klaas Bolt (6 March 1927 in Appingedam – 11 April 1990 in Haarlem) was a Dutch organist and improviser. He taught improvisation at the Sweelinck Conservatory (named for Jan Pieterszoon Sweelinck, a Dutch organist and composer of the Renaissance) in Amsterdam, where Masaaki Suzuki was among his students. Bolt was a proponent of the use of slow tempi when playing hymns. He played many hymns at his weekly evening hymn sings, which drew substantial audiences. He would typically improvise the... plus
