The company founders of ATG all received their degrees and know-how at the III Institute of Physics of the University of Göttingen in the department of Prof. M. R. Schroeder. Prof. Schroeder is known worldwide for his work in the field of architectural acoustics (backward integration of the impulse response, Schroeder diffusors), digital signal processing as well as the application of numbers theory in these areas. Before his professorship in Göttingen, he was the director of one of the world's largest laboratories in the field of acoustics and mechanics at AT&T Bell Labs in the USA.
It all started in 1988 with a predecessor called SI, an interactive program for signal processing. Based on command line control, it stored all signals in the main memory and had its own macro language for implementing complex applications. The program was developed by Dr. Koch and Dr. Püschel. Important contributions were made to SI by Dr. Fassel, who is also now part of the ATG team. It soon became apparent that a new concept would be necessary to continuously process large amounts of data for several dimensions. For this reason, the system was completely rewritten by Dr. Koch and Dr. Püschel in 1990. At that time, Dr. Püschel was at the ICSI (International Computer Science Institute) in Berkeley, California with a post-doctorate fellowship from the DFG.
The principles and initial program components for a system for continuous digital signal processing of large amounts of data with an unlimited number of axes were created.
The first company to be founded - Akustikbüro
In 1992 Akustikbüro Göttingen was founded by the partners Dr. H. Alphei, Dipl.-Phys. S. Rösler, Dr. R. Koch and Dr. D. Püschel. Akustikbüro Göttingen provides, among other things, consultation and planning of large concert halls, studios, testing and monitoring rooms.
First program version of today's si++
In order to have a stable basis for further development, the signal processing system was re-implemented in C++ using object-oriented programming methods, and today's si++ was the result. With an unchanged file format, si++ now had a graphic interface for the first time.
The second company to be founded - Akustik Technologie
At the request of customers, si++ was marketed for the first time in 1994. A separate company was established for this purpose: Akustik Technologie Göttingen. The company has been managed by Dr. Dirk Püschel since then.
Further development of si++
In the beginning, si++ was purely an analysis system for data already on a computer and was only available under UNIX®. Within a short time, interfaces were added for different tape formats from several manufacturers of measuring data recorders.si++ has been continuously expanded with diverse interactive modules for the easy acquisition, analysis and documentation of measurements. This has resulted in a very comprehensive and effective tool with a solid basis in a relatively short period of time.
As a result of its modular structure, it was possible to offer si++ as a genuine porting under Windows NT® in 1997. Once again, the system philosophy has turned out to be quite farsighted and provides a solid basis for all further developments independent of specific operating systems.
The third company to be founded - Soundtec
To meet the requirements of the increasingly international orientation of Akustik Technologie the new marketing company Soundtec GmbH was founded in the autumn of 2009. Akustik Technologie continues to be the development center.