Ab und Zu (established 1987) is a Norwegian jazz band, originally named "Anne Marie Giørtz Quintet" (1982–1987), and presenting music written by Ole Henrik Giørtz.
[1] The quintet comprised the siblings Anne-Marie Giørtz (vocals) and Ole Henrik Giørtz (piano), together with Vidar Johansen (saxophone), Audun Kleive (drums) and Olaf Kamfjord (bass).
The first record release was Breaking out (1983), followed by Tigers of pain (1985), where drummer Audun Kleive was substituted for Finn Sletten.
At Moldejazz they performed the commissions Den akustiske skyggen (1993) and Skrapjern og silke (1999), both presenting lyrics by Lars Saabye Christensen.
[2] The lineup on this project is with Kenneth Ekornes (drums) and Tore Brunborg (saxophone).