As many of you know, the Akai Unibass is a very rare, and very pricey pedal. I was just curious, is there something that does a similar effect, without breaking the wallet too bad?
i bet you could do it with a whammy as well, mine has a wet out and dry out, and you could put a distortion on the wet output...
the boss me-50b has a hi-band drive setting that can be combined with the octave up feature to simulate a distorted guitar line following your clean bass line. the demo video shows that also, should be worth a look.
EHX POG.... ok so it doesn't really do distortion.. and it really doesn't do a 4th or 5th... but hey... bass sound clip from EEHX actually, it's not too bad sounding... if they'd make a version with a wet and dry outputs, you could tack on a distortion or OD or somthing and have fun!
I use a Guyatone fuzz. It adds a strong upper octave (2nd harmonic) to the signal. Then I push it into an Ibanez PD-7 to high-pass it around 100 Hz. The whole thing goes parallel with the rest of my bass signal and I get a very decent Unibass impression. It doesn't sound so much like a guitar but it's way punchier.