The Sogitec 4X was a digital sound processing workstation developed by Giuseppe Di Giugno at IRCAM (Paris) in the 1980s. It was the last large hardware processor before the development of the ISPW. Later solutions combined control and audio processing in the same computer like Max/MSP. 4X built on the achievements of the earlier Halaphone, capable of timbre alteration and sound localization.
- Taruskin, Richard (2009). Music in the Late Twentieth Century, p.478. ISBN 9780195384857.
- Sogitec 4X — from Knorretje wiki
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