Guitar auto bass pedal?

[MattAnonymous]

I remember reading something about an effect that would play the guitar part, but would also play the bass.  What is this effect called?  Is there a schem?

[Transmogrifox]

I don't know what you call it.  I suppose it would be under the category of "automatic harmonizer".

I can't imagine anyone doing this with an analog circuit, so a schematic wouldn't do much good.  This is most often accomplished as a digital signal processing trick. The closest you can get to this with a reasonable analog circuit is a pitch shifter, which is not as interesting as it simply plays exactly what you're playing, just one or two octaves down.

[YouAre]

yeah, its called the boss oc2/oc3. It's got the regular volume, the volume of 1 octave lower, and the volume of 2 octaves lower (bass guitar)

[doug deeper]

just check out the 4013 flip flop in the blue bix scheme....and add it to any thing you want pretty much...
doug

[Ansil]

I remember reading something about an effect that would play the guitar part, but would also play the bass.  What is this effect called?  Is there a schem?

if you add a little drive before the boss pedal and some low pass filtering. like two notches it greatly hleps this unit out in tracking..

[Mike Burgundy]

Also the Rocktave. Supposedly the best tracking of them all (and it is good, although still with quirks). The Bluebox is great fun, but mainly for it's mistakes: it gets this really wild thing going when you whack a low E and the pedal gets confused - skipping between octaves, other notes at times. It's cool, but not a clean octave. A microsynth also has octave down.
I'd go with the rocktave, or buy an OC2.
hih

[zachary vex]

the maestro octave box.  it had a rudimentary non-adjustable attack/release vca controlling a deep bass thump, which was only applied to the beginning of any note or chord you played.

[smoguzbenjamin]

I have an OC-2 and it's amazing. Actually, a bass is only 1 octave lower than a guitar. Try playing an E on a bass's D string and play the low E on your guitar. It'll be the same I find the 2nd octave on the OC-2 only usefull above about A, and usually it sounds best above B or C.

But I like the pedal, its tracking is amazing and keeps up, even with fast bits

[SaBer]

I think what Matt is after is something like what Roland has. With a special pickup you can separate the lower strings (1,2 or 3) and apply an octave down only on them. The only way (I think) without a split pickup is RADICAL low-pass filtering, to cut off the higher notes. Maybe the first octave off a guitar would be good. Don't know if that would work in practise though...

[Transmogrifox]

Saber--OT, but I like your signature.

I'm one of the 10 people that understands binary...too bad for the other guy.

[MattAnonymous]

Thanks guys and I also like the binary sig.  That's hilarious (well at least to geeks like us)

[Chris S]

I'm sure I remember the guitarist from the Dirty 3 (they have no bass player) using a bass notes player kind of device in the early to mid 90s. I Don't think it was just and octave pedal and just used a regular pickup