Harry Pepl was born in Vienna on 10 September 1945 and died in Wiener Neustadt on 5 December 2005. He started out on the accordion, took up the guitar at 15 and taught himself jazz by copying recordings by Wes Montgomery, Jim Hall and others note for note. After years with the dance band Austrian Evergreens, he became a session musician and guitarist with the ORF Big Band (ORF: Austria's public broadcaster) in the 1970s.
From the mid-1970s he and the Tyrolean vibraphonist Werner Pirchner formed the duo Jazzzwio. The duo recorded “Gegenwind” in 1979, played the Montreux Jazz Festival (renowned jazz festival in Switzerland) in 1981 and in 1982 expanded into a trio with Jack DeJohnette for an ECM (the renowned European jazz label) album; it featured Pepl's composition “Air, Love & Vitamins”, which many musicians still play today. In 1980 and 1981 Pepl was the guitarist in Benny Goodman's quartet. He played with Wolfgang Puschnig, Mike Richmond and Wolfgang Reisinger in the band Air Mail, in France with Michel Portal, Dave Liebman and Jack DeJohnette, and recorded “Volver” with Enrico Rava and Dino Saluzzi. His ECM album “Cracked Mirrors” with Herbert Joos and Jon Christensen received the German Record Critics' Award (Preis der deutschen Schallplattenkritik) in 1988.
Pepl was one of the first jazz musicians anywhere to work with MIDI guitar and computer. From this he developed Real-time Composing or Instant Composing: he improvised voice by voice, had the result printed out as a score and corrected nothing afterwards. This produced commissioned works for Ensemble Wien, Ensemble Kontrapunkte, the internationally renowned Kronos Quartet, STUDIO PERCUSSION graz and the Artis-Quartett, as well as the album “Schönberg Improvations” (1990) with a Bösendorfer (Vienna piano maker) computer grand piano.
From 1977 he taught jazz guitar at the University of Music and Performing Arts Graz, and from 1984 as full professor; his students included Wolfgang Muthspiel. The province of Lower Austria honoured him with its annual culture prizes for music in 1991 and 1998.
After two brain haemorrhages, in 1989 and 1994, Pepl withdrew completely from life on tour and from public view from 1994/95, a heavy blow for him. Yet he made the best of it and worked highly productively to the end in his studio in Hernstein, Lower Austria: first at the piano, with the albums “Consequence” and “Flow”, then with the Lonely Single Swinger Band, a one-man band in which he played all the instruments himself. His sons helped him, Georg Pepl as editor of the scores, Daniel Pepl as sound engineer. The estate is administered by his son Daniel Pepl; releases from it have appeared on the Vienna label Fullmax Recordings since 2015. Since 2018 Clemens Salesny, Martin Bayer, Andi Schreiber and Valentin Duit have been playing live with Pepl's original tracks; their album “Harry Pepl (tape) & The (Lonely) Single Swinger Band: Live” (2025) took second place in the Best Album category at the Austrian Jazz Award 2025 (award for jazz from Austria).