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DSP-Quattro 3.x NEW license
One license of DSP-Quattro 3.x for MacOS X, full package, UB version.
 99 US$ / 75 € (*)  
DSP-Quattro 3.x Cross-Upgrade from other products
One Cross-Upgrade license of DSP-Quattro 3.x for MacOS X, full package, UB version. This offer is valid only to other selected Audio Editors and LOGIC registered users.

BEFORE PURCHASING the cross-upgrade, please contact support@dsp-quattro.com to provide a proof of ownership.
 79 US$ / 59 € (*)  
DSP-Quattro 3.x Upgrade from 2.x license
One 2.x->3.x Upgrade license of DSP-Quattro 3.x for MacOS X, full package, UB version. This offer is valid to DSP-Quattro 2.x registered users only.
 45 US$ / 35 € (*)  
DSP-Quattro 3.x Upgrade from 1.x license
One 1.x->3.x Upgrade license of DSP-Quattro 3.x for MacOS X, full package, UB version. This offer is valid to DSP-Quattro 1.x registered users only.
 45 US$ / 35 € (*)