Setting up and soundchecking 's guitar rig taken by his guitar tech during one of the
Smashing Pumpkins' live shows. The duties of a guitar technician depend on the type of band they are working for, and on a range of other factors such as the size and nature of the stage show and the length of the show. Guitar technicians who work for an acoustic band, such as a folk group or
bluegrass ensemble may be responsible for setting up and stringing, and tuning a range of stringed, fretted instruments including acoustic guitars,
dobros, and mandolins. A guitar tech for a
heavy metal band, on the other hand, may focus mainly on electric guitars, guitar amplifiers, and effects pedals. A guitar tech may change the sequence of effects pedals or alter the settings on effects pedals during the show, to assist the guitarist in creating different tone colours or sounds. For example, a guitarist may ask the guitar tech to connect a
chorus effect and
reverb before a
guitar solo. In an
indie rock band, a guitar technician would likely configure the equipment to evoke through
tone a modern yet historically evocative sound. In an acid rock band, a guitar tech might have to manipulate the controls on a
ring modulator or a rotating
Leslie speaker cabinet to create unusual sounds while the guitarist is performing. Once the guitars have been tuned with an
electronic tuner and strummed to ensure that they are in tune, the guitar tech usually sets up the different guitars on guitar racks, ensures that the leather or nylon straps are properly connected, and that the patch cords are plugged in properly. During the show, the guitar tech hands instruments to the guitarist or guitarists according to the types of guitar that are required in the songs that they are playing. For example, a hard rock guitarist may use a "flying-V" guitar for a fast song, and then switch to an acoustic 12-string guitar for a soft ballad. The guitar tech retunes all of the instruments before they are used, because even if an instrument was perfectly in tune during the soundcheck, the heat from stage lights and the humidity from the stage conditions may render the instrument slightly out of tune. After each guitar is used, the guitar tech cleans the strings with a cloth and replaces the instrument on a rack. During the show, the tech stands ready to replace any guitars in case a string breaks or if there is an equipment malfunction. The guitar tech may hand fresh towels to the guitarist so that the guitarist can remove sweat from the hands and ensure that the guitarist has ready access to bottles of cool water or other
beverages. If a guitar technician is working for a guitarist who uses
picks, the guitar tech may lay out a variety of picks on a guitar amplifier or tape the picks to the mic stands with double-sided tape, so that they are within easy reach. At the end of the show, the guitar tech disconnects all of the patch cords, cleans the instruments and puts them back into their cases.
Maintenance and repair The guitar tech also might perform any of a variety of maintenance tasks, such as checking that the string height of the guitars is set properly, modifying ("dressing") the height and arc of the frets, adjusting
the intonation of the instruments, checking that tubes (valves) on
tube amplifiers are working properly, and that cables are in good condition and free from crackles and hum caused by nicks and abrasions in the shielding or cable insulation. Techs also check the batteries on "outboard" devices — effects boxes, tuners, and pre-amps — and wireless transmitters, and change them as necessary. Depending on the size of a band's road crew, the guitar tech may either do this maintenance him- or herself, or, in a large touring act, delegate tasks to more-junior personnel. The guitar tech does a basic soundcheck with the different guitars, amplifiers, and effects, to ensure that the equipment is functioning properly and that all of the connections between the equipment (which are made with
patch cords) are plugged in correctly. This may be as simple as plugging an electric guitar into an amplifier or plugging an acoustic guitar into a
DI box and preamp/equalizer. On the other hand, a tech may have to set up ten or more electric guitars, a variety of amplifiers, and connect them to an intricate sequence of effects pedals. When all of the instruments and equipment are set up and
soundchecked, if there are problems — crackles, hum, no signal from the guitar, no sound from an amplifier — the tech may have responsibility for
troubleshooting to determine the cause or causes. Common problems include damaged patch cords,
ground loops in connection between instruments and amplifiers, weak batteries in effects boxes or on-board preamps, bad vacuum tubes in tube amplifiers or overdrive effects, broken electrical connectors or solder joints, speaker voice coils damaged from the previous concert, or equipment damaged during transport. Tuning problems may come from old or dirty strings, damaged or worn machine heads or frets, or mis-adjusted bridges. A guitar tech is often a "jack of all trades," expected to make simple repairs: resolder a loose wiring connection inside a guitar, replace an amplifier tube, swap out a damaged speaker for a new one, reglue a loose part on an acoustic guitar, or adjust a
truss rod. In cases where there is either not enough time to make the repair, or if the equipment is damaged beyond repair, the guitar tech may be responsible for finding a replacement instrument or part, either by purchasing or renting it from a local music store or by borrowing it from another band. While another member of the road crew may be dispatched to pick up an item, the tech usually writes down which models or brands are acceptable replacements. On rare occasions, guitar technicians may be asked to fill in for the guitarist they are teching for. ==Conditions of work==