Filter notes for bass octave

Question. This might be covered already but haven’t found anything for this. Is there a way to filter midi out so that only the lowest note is sent? I’m thinking for the purpose of getting a bass note from playing guitar. Or even better, to split so that the lowest note is sent on one channel and the others on another.

Using midi guitar 3 on iOS right now.

Yes, try the Auto Bass module

Thanks! I have tried it but it seems very glitchy. Any tips on setting this up?