Does anybody know of a pedal that doubles your voice when you sing or anything of the sort?

Answer 1

These are the products used in professional recording studios today.
DUO Vocal Modeling Auto-Doubler – Provides programmable variation in pitch, timing, vibrato depth, and timbral variation using vocal modeling technology.

CHOIR Vocal Multiplier – A unique processor that actually turns a single voice into 4, 8, 16, or 32 distinct individual unison voices, each with its own pitch, and timing variations.

The two items listed are plug-ins available for the AVOX AT and AVOX AT TDM software by Antares.
http://www.antarestech.com/products/avoxAT.shtml

If your looking for hardware try the TC-Helicon VoiceDoubler
http://www.tc-helicon.com/VoiceDoubler

Answer 2

If you'll look in musiciansfriend.com, Digitech makes a vocal harmonizer , that will give you two part harmony, and voice doubleing access! It is convenient and not too expensive! They have other harmonizers that you can check out, and see which ones have the accessories that you are wanting! When you read the specs, make sure they have the voice doubleing feature available in the unit!

Answer 3

Any delay unit works - you just set the delay time very short - it's usually called "slap back" delay. You can't really hear the delay it just seems like 2 voices. It's more realistic on expensive units - but the delay is the basis of it.