Thomas Egeskov Petersen, known as Laxity in the European C64 demo scene, composed more than 200 SID tunes on the Commodore 64 from 1987 and up, most of them in his own music player.
SID tunes are chiptunes created on the Commodore 64, or an emulation of the C64 or its SID chip.
The SID chip in the Commodore 64 was quite advanced in 1982. It had three channels across eight octaves, ADSR, four different waveforms, pulsating on the square waveform, three ring modulators, and multi mode filtering. The music players written for it were usually called 50 times a second, quickly changing waveforms and frequencies to simulate vibrato, drums and arpeggio chords.
I’ve been listening through all of Laxity’s tunes in the latest High Voltage SID Collection which was at #65 at the time of publishing this blog post. I selected more than 180 tunes I liked and created stereo MP3 files for easy listening here. You could call it sort of “Laxity’s Greatest Hits” as compiled by JCH.
21.G4 Demo Tune #1
2005 Vibrants / Maniacs of Noise
One of three demo tunes Laxity made to test music player v21.G4 for my music editor.
21.G4 Demo Tune #2
2005 Vibrants / Maniacs of Noise
21.G4 Demo Tune #3
2005 Vibrants / Maniacs of Noise
2000 A.D.
1987 Wizax
Made in Rob Hubbard’s music player.
2000 A.D., 2006 by Juha Kaunisto
3545 II
1988 2000 A.D.
Made in Rob Hubbard’s music player.
A Trace of Space
2005 Maniacs of Noise
A Trace of Space, 2013 by Mordi
Adventure
1989 Flexible Arts
The Alibi 
1989 Maniacs of Noise ADLIB SB
I converted this to both AdLib and Sound Blaster in 1992.
Alibi (Sooner or Later), 2012 by Mordi
The Alibi Cover, 2011 by Darkman007
The Alibi, 2009 by Mordi
Alibi of Laxity, 2004 by moog (Sebastian Bachliñski)
Anne-Louise
1988-90 Flexible Arts
Arabian
1989 Flexible Arts
Atmo Spherical
1990 Vibrants
Atom Rock
1989 Flexible Arts
Ausfahrt Asia
2010 Recollection
Composed in SID Factory, Laxity’s own C64 music editor.
Axel F
1988-90 Flexible Arts
Conversion of “Axel F” by Harold Faltermeyer.
Basics
1990-92 Vibrants
Basics, 2013 by Mordi
Basics of Love (featuring Makke), 2007 by moog (Sebastian Bachliñski)
Beastie Boys Intro Music
1988 2000 A.D.
The title refers to a demo group in the C64 scene, not the American hip-hop group.
Beat the Shit 3
1988-90 Flexible Arts
Beginning
1993 Vibrants
Beginning, 2008 by moog (Sebastian Bachliñski)
Beginning, 1998 by Søren “Jeff” Lund
Blue Blop
1993 Vibrants
Boney
1990 Vibrants
Bossa Nova
1989 Starion
Break Free (Tune #1)
1990 Vibrants
Break Free (Tune #2)
1990 Vibrants
Break Free (Tune #5)
1990 Vibrants
Break Free (Tune #6)
1990 Vibrants
Break Free (Tune #7)
1990 Vibrants
Bright
1989 Flexible Arts
Broken Ass
1988 Zetrex
Made in RockMonitor. Features a fourth channel with digital drum samples.
Complete 2
1989 Flexible Arts
Cool Kaffe
1990 Vibrants
The title is Danish and translates to “Cool Coffee” in English.
Coop 6581
2013 Onslaught / Wrath Designs
Composed in SID Factory, Laxity’s own C64 music editor.
Crosswords
1988 Starion
Depressed
1988 2000 A.D.
Depressed (Renoise 2.5 Beta Mix), 2009 by Amok
Digidag
1987 Zetrex
Made in Rob Hubbard’s music player. A fourth digi track starts at 1:01.
DNA Warrior (Tune #1)
1989 Flexible Arts / Artronic
Cooperation between Future Freak and Laxity. Used in the C64 shoot’em up DNA Warrior by Artronic.
DNA Warrior (Raggadub Remix), 2007 by Metal
DNA Warrior (Tune #3)
1989 Flexible Arts / Artronic
DNA Warrior Highscore (80’s Remix), 2009 by Metal
DNA Warrior (Tune #5)
1989 Flexible Arts / Artronic
Continued on page 2. There’s a page selector below.
Great! “Zimxusaf I” is one of my absolute favourites – I wonder what the title means though ??! 🙂
Never heard “Fairly Green” before – shows me that Laxity is the jazz master 😀