Glitches in very low signals in ParamMC

Basic info

• Commit SHA: 86862b41
• Platform: all

Bug description

Using a too low epsilon in a step of the covariance synthesis for ParamMC, to be precise in the regularized inverse of Kx, can lead to bursts for very low signals in the synthesis.

Original Signal

Decoded Signal (ParamMC@80 kbps SWB)

Ways to reproduce

(Clear steps or refer to a failing automated test, e.g. with a pipeline link)