more controllable vibrato depth

I find that vibrato depth 1 (that is, a v61 command for instance) is too much for me. I’m not picky at all about how, but I need some way to reduce the sensitivity. Could be per instrument, per track, per song, per user preference… whatever’s easiest.

I could try making it in the instrument envelope and triggering it at the desired time somehow, but that’s pretty inconvenient. There’s basically never any time I want a depth of 1 and would probably be happy with half that every time.