John Phillips wrote:

Eeyore wrote:
John Phillips wrote:

I often see texts that imply or state outright that ringing in time-domain
audio waveforms, usually associated with time-domain discontinuities,
is to be avoided. I wonder what is the basis for this.

Ringing on square wave inputs may be a sign of maginal stability.

Indeed. For ringing in an "analogue" sense. I was actually thinking
of digital systems and I see now the multiple uses of "ringing" so I
should have clarified.

In digital it could be anything, even down to fundamentals of the theDSP filter
structure.

Graham