I wonder why several RMS meters I'm using for music production show RMS values above 0.
For example, when using an input signal with a constant DC of 1 (0 dbFS), I get these results, although Wikipedia says that in such cases, the RMS is equal to the amplitude of the direct current.
Samplitude Pro X (RMS: 2.9)
TT Dynamic Range Meter (RMS 3.0)
Whereas other meters show the values I expect:
Voxengo SPAN (RMS: 0.0)
Why is it that meters come to such different results?