By selecting the body and model type of the guitar being played, players can share the true sound of an acoustic guitar with live audiences. Presets for 16 body types and 28 models simulate the sonic characteristics of various acoustic guitars with different body shapes and constructed of different materials. Here’s the basic signal flow: A large dial selects from 16 different guitars styles (such as Dreadnought, Round Shoulder, Orchestra, Double 0, Resonator, etc.), and you choose the setting that most closely matches your guitar. Then there are two input gain knobs for the unit’s twin channels, each with an LED peak indicator. Next are a 3-band EQ, master level, and a balance control to set the blend between dry and effected signals. I came across this video which explains the features I thought a bit better than the manual and it may help folks that are new to the A3.....

The A3 also has the ability to recreate the distinct sound components of 28 of the world's most famous acoustic guitars. The A3 even accounts for the subtlest of differences between these models. The pedal accurately recreates the tonal differences between guitars with the same body shape, but different bracing or wood from which they are made. Output impedance: BALANCED OUT: 100 Ω (HOT-GND, COLD-GND), 200 Ω (HOT-COLD), GND LIFT (switchselectable) If you cannot find body and model types that match the guitar you are using, use ones that are as close as possible. Be aware that combinations of body and model types that do not exist in reality will not produce suitable tones.This is definitely a tweakers pedal. Many of the controls are not intuitive and while the manual has a lot of good information it’s not going to help some people with the pedal. If you want a simple plug and play pedal – you’re going to be disappointed. Add the shimmering silkiness of phasing, flanging, chorus, tremolo, vibrato, detuning, and pitch shifting with these 9 effects.

The effects themselves sound really good. There are rich reverbs, good modulations and lots of delays" You'll find many popular acoustic guitar bodies and types here, from Dreadnought to Jumbo, from Round Shoulder to Square Shoulder, and from Single Cutaway to Resonator. Also included are emulations of Martin 00 and 000 models, resin-body guitars such as the Ovation Adamas, and both twelve-string and nylon-strings—even upright bass. All A3 models accurately recreate the tonal differences between instruments, down to the bracing and type of wood from which they aremade. Easy-to-use interface includes LCD, footswitches, analog-style cursor keys/parameter knobs and LED indicators

Multi-fx/DI for acoustic guitars

The A3’s front panel features three parameter knobs that also function as buttons. These buttons can be used to open various menus where you can then use the parameter knobs to tweak effect settings to your liking. Adjust the mix position of mic signal, turn the AUTOSAVE function ON and OFF, recall patches and more with ease and efficiency. The A3 allows you to plug a microphone in and the balanced XLR output allows you to use the pedal as a DI box. There’s a ground switch to eliminate ground loop hum. Power