I've made a few "bubble" presets for the C4 - which MAYBE you can load to your spectrum? I'm not sure right now.. anyways, here are some possible candidates: Neuro Community by Source AudioI've been enjoying my Spectrum which I just bought a few days ago - it's great to have the options of "talking" sounds, octaves, gated fuzz and running the Mutron in Down mode. However I haven't quite nailed the standard Up response I'm looking for. Up to now I've been using a Mooer Envelope which responds absolutely perfectly for me - with Decay set to minimum, from a very closed bassy attack it immediately opens to whatever Q and LPF are set to, and then closes so quickly that I can pick pretty much as fast as I like - a sort of "wab wab" envelope which is VERY Garcia (I play guitar as well as bass). The Mooer's limits are that it only has one sound and it overdrives a little so it's not clean, but I love that response. The Spectrum seems to only be able to open a too-long moment after the attack, or open too sharply to too much treble, or close too slowly, and I've been fiddling with it for hours trying to get what I want. Can anyone help?
Or specifically for the spectrum (above are all C4 presets), this here maybe? Neuro Community by Source Audio