Taking in mind that there exists a variety, there are few things that are with your consideration. These tips will surely be practical to you at any moment.
One of the most prominent features of the pedals is the harmonies. It is really a nice thing to be able to add one more harmony to tune being sung. Most of them use instrument inputs or guitar to change the harmonies to fit the chords on the play automatically. If it is not for the smart guitar controlled harmony, setting the key and setting the intervals within a key would have to be done manually. Different pedals will have varying number of simultaneous harmonies ranging from one to four voices. You can tweak character of the voices in different ways such as pitch and time variations.
Another feature that you should be keen on is the auto-tune. The pitch correct, which has rocked some genres of music is used to correct tuning problems and create distinct sounds. It is great when looking for some practical help with some tough songs or want a sound of T-pain, Kayne west or specific populate singers. It allows you to control the outcome of the pulling off the pitch if your sound to the destined one. Modest adjustment and lower speed are the best if you are looking for a natural pitch. In case you drift, the hard tune can warble since it locks the voice so quickly. Several vocal pedals allow for chromatic setting if you are getting near the desired pitch.
The vocal effects and looping are other things that are worth attention when buying the vocal pedals or processors. Reliable control of the primary voice effects such as the reverb EQ and compression are part of the main reason for buying the vocal pedals. There are in fact some pedals whose functionally is based only on these core functions. In fact, most of the process have the formant shifting that allow for character of the voice conversion. This feature lightens or deepens the character of a sound and artificially changes the gender and age of the singer. Such effects have increased in the popularity owing to the tonal effect. Often, they are applied for harmonies with the male/female style backup.
The guitar effects help from the smart chord-based harmonies. The guitar effects have been introduced to many medals to make them all performance units. Often, they are customized to acoustic players providing the reverb, modulation and delay filters. If you are a player that uses guitar and want to keep the rig simple, you will want to use these effects.