Affects: Filter operation
To obtain the linear envelope of a signal, you have to full-wave rectify the signal, then low-pass filter it with a relatively low cutoff frequency. To do this, enable the "Rectify before filtering" option, set this parameter to the level where the signal is to be "folded over" by full-wave rectification, and set the filtering parameters.
This parameter can be set visually, using the pointing device to set the level.
|Key sequence||Parameter||Initial Value|
|<Esc>MFB||Rectifier baseline||-32768 AD|