PRELIMINARY
miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice 10
1.1 DIRAC LIVE
The powerful processor in the SHD Series processor executes Dirac Live® digital room correction, from Dirac
Research. Dirac Live’s mixed-phase filtering technology will improve the imaging of your system, minimize the
effects of room modes and resonances, and improve dynamics and clarity.
To accomplish its remarkable improvement in listening quality, the Dirac Live Calibration Tool for miniDSP
(DLCT) steps you through the procedure for taking measurements around your listening area. Dirac Live®
employs a sophisticated analysis algorithm to make the optimal correction across the whole listening area, not
just at a single point. The user has full control over the target response. Measurements are taken with a
calibrated acoustic measurement microphone, the miniDSP UMIK-1.
2
In addition to correcting magnitude response, Dirac Live® corrects the system’s impulse response, which reflects
how the system responds to a sharp transient such as a drumbeat. Reflections, diffraction, resonances,
misaligned drivers, and so on, all combine to smear out the transient. Correcting the impulse response makes
the speaker in the room behave much more like an ideal loudspeaker. The impulse response is a critical factor
for accurate sound-staging, clarity and bass reproduction.
2
A UMIK-1 is included in the standard purchase price of each SHD Series processor. Other microphones cannot be used.
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