Down envelope filter sweeep?

It might be time to get that feature request ready.  This type of ‘Mutron Down’ idea has come up before.

There are the Octaver filters, if you want to crack the rafters.  That will double your bass down another 1 & 2 octaves.

For the time being, you might want to try out HotSawz.  Fast Attack; slower Decay, over the resonant filter, with a sawtooth voice (or six).  I use that almost like parallel compression, with dry alongside the generated synth voice.

That might work out well with a (monophonic) bass line.  I do find it to be very forgiving with perfect intervals, though.  With the occasional glitch when HotSawz is trying to ‘find’ the fundamental pitch.

Actually, now that I think about it (always a dangerous proposition) …

I wonder how feasible it is to add switchable routing to the HotSawz algorithm?  Process the input signal, or process the generated sawtooth oscillators.

You’d probably need to defeat or modify some of the controls (Mix Ranges; Osc Depth becomes detuning: Gate).  Without knowing the R&D particulars, it seems like an easier route to repurpose what’s already there.

In a nutshell, configurable resonant filter processor for the input – OR – for the oscillators.  Sounds so simple from an outsider’s POV, doesn’t it?