PRESONUS AudioBox Stereo Quick Start Manual page 306

13.3.3 Tuner
The Tuner proves invaluable when inserted on guitar, bass, and other instruments that require
frequent tuning. The Tuner features a switchable standard/strobe display, with exact
Frequency and Difference readouts in the upper left-and right-hand corners. A Calibration
knob enables calibrating the Tuner to a center frequency from 415 Hz to 465 Hz. Click on the
Strobe Mode button to enable the strobe display, in which the rotation speed is a measure of
the amount you need to tune.
There is a center-note indicator with an arrow to either side. When the left arrow is displayed,
the signal is tuned below the closest note; when the right arrow is displayed, the signal is
tuned above the closest note. When both arrows are displayed, the signal is perfectly tuned.
13.3.4 Level Meter
The Level Meter plug-in is a level meter that can be sized as a horizontal or vertical display
type. The following parameters are available in the Level Meter:
• Conf. Choose from Peak/RMS, K-20, K-14, and K-12 modes, and set RMS and Hold
Lengths
• Show Corr. Engage to display phase correlation.
• ISM. Enable to display intersample metering.
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