Abstract
| Group(s): | Nuance |
| Real name: | Harald Wittmaack |
| Nationality: | German |
| Function: | Graphics & organizer |
| Later known as: | Raven (Nuance) |
Releases in which Abstract participated:
| Introduction (Graphics) | Nuance | 16.11.1991 |
| Mini-Meeting Slideshow (Graphics) | Nuance | 1992 |
| Greatest Packtunes #01 (Graphics) | Nuance | 28.11.1992 |
| Morning after - Preview (Graphics) | Nuance | 1993 |
| Hypnotica Meetro (Graphics) | Nuance | 1993 |
| Free your Mind (Graphics) | Nuance | 11.03.1993 |
| Subtle Shades (Graphics) | Nuance | 02.08.1993 |
| For your pleasure (Graphics) | Nuance | 17.11.1993 |