Processing audio in an OpenShot video

[Gunivortus]

Hi.
I've read while showing pictures the stanzas of a poem. Each stanza is a mkv file. I placed all files at the timeline in OpenShot. Between each file there is a pause.
Below that I have placed an MP3 file with music.
The music should play softly while stanzas are read, but play louder in the pauses.
Can I raise and slow down the music in OpenShot or should that be done first in an audio editor?

Kind regards,
Gunivortus

[abolibibelot]

Any recent and decent video editor should allow to dynamically change the audio volume (some even have an option to do it automatically).
I've never tried this one, but there should be a manual somewhere.