Operation Manual
25
Overview
Much of the operation of VoiceLive Rack is 
covered in the Quick Start and Basic Operation 
chapters. This Detailed Operation chapter offers 
additional procedural detail where it’s needed. 
For button menus and parameter descriptions 
see the Setup, Edit etc. menu chapters.
Harmony and Hardtune Guided 
by a Guitar
TC-Helicon’s NaturalPlay algorithm can listen to 
chords played on an electric guitar or electried 
acoustic guitar to guide the Harmony and the 
Hardtune effects. Both need to stay “in key” or 
musically relevant to accompanying instruments. 
 f Acoustic guitar
If you haven’t by now, connect a cable from your 
pickup-equipped acoustic guitar to the GUITAR 
IN as described in the Quick Start. You should 
now hear your guitar sound mixed with your 
voice.
To adjust the balance of guitar and voice, ensure 
the HOME button is lit then turn the third Mix/
Edit knob. This will present the MIX screen so you 
can adjust the level of your guitar. 
Now, sing while you sample the harmony- and 
Hardtune-based presets with effects closely 
related to your guitar playing. You should now 
hear nicely produced lead vocal, harmony and/or 
Hardtuned vocals and guitar from your PA system 
or headphones.
The recommended pickup is the typical under-
saddle type because potential mistracking can re-
sult from resonances generated by soundboard-
mounted pickups.
 f Electric guitar
Connect a cable from your electric guitar to the 
GUITAR IN. Connect another cable from the 
GUITAR THRU to your rst guitar effects pedal 
or to your amp. Set your guitar amp volume to a 
level compatible with your vocals.
By connecting a jack to the GUITAR THRU, the 
guitar signal is removed from the internal mixer 
and effects paths in VoiceLive Rack. 
If you hear a buzz from either your guitar ampli-
er or the PA VoiceLive Rack is connected to, press 
the GND LIFT (ground lift) button to silence it. 
Now you can sample the harmony- and Hard-
tune-based presets with the effects musically 
related to your guitar playing. 
 f Guitar performance tips
To ensure that the harmony voices follow your 
guitar closely, it’s best to play cleanly with chords 
containing at least two notes. If you want to 
sing right at the start of a song, it’s important to 
briey play a chord rst. A recognized chord will 
show “NP” in the LCD display.
Your guitar should be well-tuned. TC Electronic’s 
PolyTune is perfect for this.
If the song section you want vocal harmony or 
Hardtune effects on has fast chord changes, single 
note runs or very slow arpeggios, it may be bet-
ter to use presets based on a xed Key. To nd 
out more about this see Harmony and Hardtune 
guided by a xed key.
Harmony and Hardtune Guided 
by a MIDI Keyboard
Using MIDI opens up a range of harmony options. 
This section will discuss the basics of setting MIDI 
channel and performing with a MIDI keyboard/
synth to control Harmony and Hardtune.
Detailed Operation
