AppAdvice has once again teamed up with IK Multimedia in order to offer you a chance to win one of three (3) promo codes for AmpliTube for iPad ($19.99) or one of three (3) promo codes for AmpliTube for iPhone and iPod touch ($19.99).

AmpliTube for iOS gives you amazing guitar amps and FX, and when combined with the $39.99 iRig plug interface adapter, becomes the ultimate guitar and bass MultiFX system right in your backpack.

Your new mobile rig gives you up to four simultaneous stomp box effects — the iPad is capable of doing one more than the iPhone and iPod touch, an amplifier, plus speaker cabinet and a microphone. AmpliTube for iOS includes stomps for delay, fuzz, overdrive, wah, envelope filter, chorus, flanger, phazer, octave, noise filter + distortion, powered by a clean, crunch, lead, metal, or bass amp. Additionally, choose amongst five cabinet and either a dynamic or condenser microphone.

AmpliTube for iOS has a built-in chromatic digital tuner and a metronome to offer an increased level of accuracy, especially in noisy environments, due to the fact that your instrument is plugged directly into your iDevice.

Import and play up to 50 songs for use as backing tracks with real time effects plus the ability to create, save and recall up to 36 presets on the fly. You can change the tempo of imported tracks, without messing up the pitch, using the SpeedTrainer feature.

The built-in track recorder offers re-amping, plus two send effects per channel (selectable among Reverb, Delay, Chorus) and two master effects with up to a four (iPhone and iPod touch) or eight (iPad) track capability when expanded via an in-app purchase.

You can even try AmpliTube for iOS‘s features without a guitar by using the built-in demo section. Choose one of the eight guitar audio riffs, click play, and go try some different amps and sound-FX.

Want to learn even more about AmpliTube for iOS? See why we consider it a “must buy” in our hands-on review of the iPhone and iPod touch version.

If you’re looking to truly outfit your stage performance for convenience, check out IK Multimedia’s latest accessory, the iKlip. Purchase the iRig and iKlip at the IK Multimedia Web Store.

To have a chance at winning one of three AmpliTube for iPad or iPhone / iPod touch promo codes, simply leave a comment telling us whether you’ll be using your iPhone / iPod touch or iPad to rock out with before 11:59 PM PST tonight (February 14th). Only one entry per person is allowed.