high/low pass filters

[lvm]

Reading the man for sox, highpass|lowpass give an option of passing single-pole or double-pole, the latter gives the option to set a width (Q). In terms of simplicity, was thinking of setting these filters with single-pole, but perhaps it's worth to investigate further if it's worth to use double-pole (here's an explanation of double-pole but it goes beyond my knowledge at the moment).

   highpass|lowpass [-1|-2] frequency[k] [width[q|o|h|k]]
          Apply a high-pass or low-pass filter with 3dB point frequency.  The filter can be either single-pole (with -1), or double-pole (the default, or with -2).  width applies only to double-pole fil‐
          ters; the default is Q = 0.707 and gives a Butterworth response.  The filters roll off at 6dB per pole per octave (20dB per pole per decade).  The double-pole filters are described in detail in
          [1].

So i'm creating this issue to open the discussion to others who might have an opinion on the subject.