build-up

Imported from adrianeyre/soundcheck (skills/build-up/SKILL.md). Install upstream with npx skills add adrianeyre/soundcheck --skill build-up. Copyright stays with the author.

Make a build-up into the Section the musician names (such as the chorus), over the bars before it: 4 bars unless they say otherwise. If they name no Section, build into the second Section of the song; if there are no Sections, into bar 9.

1. Find the Section's startBar, and the ticks of the bars before it.
2. On the Drum Track, add a snare roll over those bars that gets faster: quarter notes, then eighths, then sixteenths in the last bar, rising in velocity. Stop it a beat before the Section starts, for a moment of space.
3. On a Synth Track that plays through the build-up, automate its filter cutoff to rise from low to fully open across those bars.
4. If there is a Reverb Bus, automate the Send level from that Synth Track to rise over the same bars, and drop back at the Section's start.
5. Leave the Section itself as it is.

Say what the build-up does, bar by bar, in one or two sentences.