No, we recommend for accuracy and precision(simply for the right values) as an EE. So, we don't say measure offset using dmm if it's not measuring offset. We recommend a tool that measures offset.
Wrong, DC measurments, when input is DC. Audio signal is AC+ offset(there will be some offset). explain to me how offset is being measure by the dmm with the DC setting.
RMS what? Duhh. Voltage.. what is this thread about again, you should know by now..
The RMS value of a set of values (or a continuous-time waveform) is the square root of the arithmetic mean (average) of the squares of the original values (or the square of the function that defines the continuous waveform).
In the case of a set of n values , the RMS value is given by:
The corresponding formula for a continuous function (or waveform) f(t) defined over the interval is
and the RMS for a function over all time is
The RMS over all time of a periodic function is equal to the RMS of one period of the function. The RMS value of a continuous function or signal can be approximated by taking the RMS of a series of equally spaced samples. Additionally, the RMS value of various waveforms can also be determined without calculus, as shown by Cartwright.
all of the above aside, if the DAC does not mute the output with no signal and the offset is constant at any volume (it is for the two devices I measured), then you're just measuring vanilla DC voltage on the outputs and a DMM is more than adequate
Edited by svyr - 6/4/11 at 2:43am