Audacity 4 documentation · Primary-source explanation; examples are illustrative. Instructions are based on publisher guidance; a UK IPTV account was not tested on this platform.
Distinguish editing mode from the curve
The current Audacity manual places editable volume curves on clips and describes the Clip envelope button in the tools toolbar. Turning that editing tool off changes how subsequent clicks behave; it does not disable the curve already drawn. The curve moves with its clip and is saved in the project. This differs from assuming that a level change exists only while a particular tool is selected.
Plan a local dip in a music bed
For an original example, an authorised demonstration uses background music which should become quieter under one spoken explanation and return afterwards. Add enough control points to preserve the surrounding music level, create a deliberate descent before the speech and restore the level after it. Listen across both transitions. Switching back to ordinary selection should let you continue editing while the planned level ride remains in effect.
Check the saved edit and the rendered result
Save the project, verify the curve on reopening and listen to the relevant portion of the eventual audio export. Keep the dip editable until the spoken section is final, since moving the narration can change where the quieter interval is needed. An older tutorial asking for the separate Audacity 3 Envelope tool uses a different interface vocabulary; Audacity 4 release notes explain the move to clip gain editing. Follow the documentation for the installed version when finding the control.