I’ve been going to bluegrass jams playing string instruments for years. Some are strict about instruction, songs, and style and some are more relaxed, more like folk-inspired acoustic. One jam I go to occasionally explicitly invites instruments outside the half-dozen traditional BG string instruments – accordions, harmonicas, etc – as long as it is acoustic volume and fits with folky style music. No one would be offended if I showed up at this jam with whistles in a few keys.
The thing about BG jams is most of they time you play backup and occasionally take an ad-libb solo (break). So if I played whistle, what would I play on backup? Droning chord tones would be a start. Often the fiddle would play a shuffle rhythm 1/4 1/8-1/8 1/4 1/8-1/8. Don’t know if that would sound good on a whistle toot toot-toot toot toot-toot. I don’t have a good enough ear to ad-lib a counter melody.
Anything thoughts on what to play when playing backup at a folk/BG jam?