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Input dB Toggle
The total attenuations including Master (if present and calibrated) for the Left and Right inputs are also shown on either side of the dB button. If your card doesn't have Master Input controls, these readouts will just mirror the line control values.
Note that if you select an input line that has not been calibrated yet, the dB button will remain active but the total attenuation readouts will vanish and the controls will revert to step units.
dB mode allows scrolling of the Level or Master controls such that only real attenuator steps are selected, skipping all the dummy steps that Windows inserts to make slider controls appear to have more resolution. So the true input sensitivity will change on every scroll step.
In_dB=1 the dB mode, In_dB=0 sets step mode, and In_dB=x toggles between the two modes.
Note that the state of the dB button controls the units of the InLineL and InLineR Line Level commands (as well as InMstL and InMstR, if your card has Master Input Level controls.) Use an In_dB command before these to be sure you don't get step -3 instead of -3 dB.
See also Input Control Dialog
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