User Manual

Genelec Loudspeaker Manager (GLM) 2.0 - System Operating Manual page 20 of 52
Figure 15. Group definition window; the monitors with a green halo is active; monitors with a yellow
halo are not part of the active group
Automatic Calibration Using GLM AutoCal
GLM AutoCal is a powerful monitoring system calibration algorithm running inside the GLM
software. Sweeps are generated by each monitor in a group. Responses are recorded with the
GLM measurement microphone into your computer.
The computer analyzes the sweeps and calculates the frequency responses for all monitors and
subwoofers, then optimizes level and delay to compensate for differences between monitors, and
sets equalization for the individual room responses to remove colorations caused by the room and
the location where the monitors have been installed. The end result is to have sound from all
monitors arriving at the listening position at the same time, same level, and compensated for the
effects of the room acoustics, resulting in very accurate imaging and reliable monitoring.
Each monitor group has its own acoustic settings. This is one of the important features of GLM 2.0.
Each setup file can contain several monitoring group definitions each with different AutoCal
calibration settings.
Even with the same set of monitors you can determine several listening positions by applying
calibration in several locations and defining each location as a new group. For example, one group
can be ‘Engineer Position’ and another ‘Producer Position’. Each can have its own calibration.
Then, selecting the group in the GLM 2.0 software quickly loads all acoustic settings specific for
each microphone position.