Sliding on the trail from Violet's Flow State (her 2) plays your song from the top. Short hops off the trail don't stop it, and if you come back within ten seconds it picks up where it left off. The volume has its own slider in Settings, under Audio.
Drag the two handles to set where the song starts and stops, or drag the middle to move the whole part. Sliding always starts at the left handle. Use the zoomed strip to land the start on an exact beat or word.
How long you can be off the trail before the song stops. Longer lets you hop gaps; shorter stops it sooner.
How quickly the song fades once the buffer runs out. 0 cuts it off.
.vpk file.Deadlock\game\citadel\addons and rename it to a free slot such as pak20_dir.vpk.