High Pass filter causing DC Offsett...see waveforms.

Discussion in 'Microphones (live or studio)' started by ptfigg, Mar 24, 2005.

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  1. ptfigg

    ptfigg Active Member

    Feb 9, 2005
    I have a Mackie Onyx 1620 and a Shure SM7B on channel 5. The board has a Low-Cut Switch on the channel. When it is engaged it causes DC Offset. Take a look:


    Should this be expected? The graphed scale at the left represents the Amplitude ruler in my waveform Editor.


  2. dpd

    dpd Active Member

    Sep 29, 2004
    I don't see a DC offset in either graph. Both signals are around the 0 amplitude point.

    However, it sure seems like the polarity is being inverted when the low-cut is enabled. You'll have to zoom in on each waveform and check to be certain.

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