This document contains a description of features that are not mentioned in the manual.


TSDriver:
Improved suspension creep model:
The suspension creep model has been improved according to the paper "Modelling Viscoelasticity of Loudspeaker Suspensions using Retardation Spectra" by Tobias Ritter and Finn Agerkvist (AES 128, paper #8217).
For this purpose a selector "Creep model" is available in the TSdriver pane
This can be set in 5 different modes
 + Off
 + Default (according to the implementation in older versions of LspCAD)
 + LOG 
 + 3PC
 + 4PC
The three last modes are implemented according to the paper mentioned above.

In the LOG mode, suspension creep is controlled by lambda
In the 3PC mode, suspension creep is controlled by Kappa and Tmin
In the 4PC mode, suspension creep is controlled by Kappa, Tmin and Tmax


New since LspCAD 6.64 2021-11-04
Emulator:
+ Additonal parameter "Excess del comp." (Excess delay compensation) allows to 
 subtract a delay before cirkular convolution filter coefficients are calculated. 
 This delay is added back to the resulting filter coefficents after the calculation.
 The method solves a problem where large delay (for instance due to a digital delay line)
  could cause bad filters and audible frequency response distorsion.

Settings | General:
+ Frequency steps can be 
 + Log (logarithmic)
 + Lin (linear)
 + Log-Lin (The 1st 3/4s of the steps are log spacing, the rest are lin spacing  

Settings | Phase/group delay:
+ Additonal parameter "Excess delay compensation" allows to 
 subtract a delay before phase and group delay is calculated

Settings | Time domain:
+ Additonal parameter "Excess del comp." (Excess delay compensation) allows to 
 subtract a delay before time domain response is calculated





