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IntroductionManaging Treatments > BPF Editor > Adding and Manipulating BPFs
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Adding and Manipulating BPFs

Adding a BPF in the AS Window

Chosing a Treatment

A BPF is displayed after a treatment is chosen.

Transposing a Sound
Transposing a SoundZoom
  1. If you want to apply the treatment to a given temporal segment, select it with a click and drag in the waveform, or click and shift click in the waveform.

    If you don't select any segment, the BPF will apply to the whole sequence.

    Note that the BPF can be rescaled in time – see below –.

  2. Select a treatment in the Treatments Menu.

  3. In the dialogue window that opens, press OK. You can also possibly edit the initial value of your BPF, such as a transposition value for instance, as well as a number of options.

The treatment will appear as a BPF in the default location : sonogram, waveform or instantaneous spectrum area.

BPFs : Treatments Parametric Values
Activating a BPF

To manipulate a BPF, select its editor with a click on the upper bar – or in the editor itself, but beware of possible unintentional edition –. The bar, and the representation of the BPF in the treatment sequencer will turn blue. If the BPF is not selected, the bar will be grey.

Hiding/Showing or Choosing the Location of a BPF

Some BPFs, such as the transposition, pitch shift and gain can be displayed either in the sonogram, in the waveform zone, or in both locations.

To choose a location,

  1. Ctrl click in the corresponding block in the processing sequencer 

  2. select the Hide/Show item

  3. check the menu item corresponding to the location you wish to use.

If no location is selected, the BPF will be hidden.


All the operations described below can be undone or redone with the standard Edit/Undo-Redo menus and shortcuts.

Protecting and Locking a BPF

Protecting a BPF

A BPF can be protected in order to prevent indavertent manipulations.

  • To disable the edition of the BPF, click on the small pencil icon . The BPF can then only be moved in the sonogram or in the waveform area.

  • To enable the edition, click on the pencil again.

Locking the BPF

A locked BPF cannot be moved from its location.

To lock a BPF, Ctrl click in the corresponding block in the processing sequencer and select Lock. The contour of the block will get dashed.

To unlock the BPF, Ctrl click and select Unlock.

Temporal Dimensions of the BPF


A BPF can be rescaled in time, via the sonogram or waveform area, or via the processing sequencer.

  • Hover the mouse over the left or right border of the BPF editor until a double triangle is displayed.

  • Click and drag the border to the desired location.

The BPF will be compressed or expanded, but its values won't change.

Note that a locked BPF can't be rescaled, whereas a protected BPF can be rescaled.

Rescaling the BPF via the Inspector Window

The BPF can be trimmed, which means that the first or last values will be deleted.

  • Press Alt and hover the mouse over the border of the BPF until the trim pointer is displayed.

  • Click and drag the border towards the center of the BPF. Note that, conversely to a representation in a basic sequencer, the BPF cannot be "untrimmed".

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