An alternative to the General (2nd Order)Slew filter, the Text-In block lets you set parameters using text fields, without having to open another window. The algorithms are the same, giving access to the wide variety of 2nd-order-filter behaviors, although not all the algorithms are offered with Text-In.
The slewing functionality is added for smooth transition from one set of filter coefficients to another when the filter parameters are changed. The slewing takes place approximately in the time set by the user in the GUI. The slew time can be entered in the GUI slew Text box. The slew time range is limited between (0 to 1 second).The slew computation is always performed in single precision.
See theGeneral (2nd Order)Slew page for information about the algorithms driving these blocks. The available filters are:
To use this block:
As with other blocks, there's the option Grow this algorithm. Observe that with this block, growing the algorithm adds another frequency band to the block, which is equivalent to having two filters in series.
NOTE: Due to fixed point operations, the filter coefficients do not slew exactly in the set slew time.