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Faking acoustics with piezo bridges

Techniques & Tips

Published in PM July 2008
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Technique : Stagecraft
What do you do when you need acoustic and electric guitar parts in the same song... and you're the only guitar player in the band? Well, how about a separate 'fake acoustic' output from your electric, for a start?
Clive Osborn
As a performing guitarist, you will have undoubtedly had to recreate a studio recording in a live situation. In such circumstances, it is often impossible to faithfully recreate the complexity of a studio recording without employing many musicians. One such situation is where you have both acoustic and electric guitar parts in the same piece of music and you are the only guitar player in the band! Maybe you are trying to perform your own composition live, where there are sections of electric guitar and separate areas of acoustic guitar. Or maybe you play cover versions where you have to reproduce two recorded guitar parts live. In both cases, a compromise is usually required to reproduce this during a live performance.
I have tried out various solutions to this problem. These have included using an acoustic (or electro-acoustic) guitar for one section of a song and then adding an overdrive pedal to simulate the sound of a driven electric guitar. This doesn't work that well to my ears for two reasons: you can never achieve a true electric guitar sound from an acoustic, and the feel of an acoustic guitar (often with heavier gauge strings and a wound third string) is not the same as an electric, particularly for lead work. In a similar vein, I have also tried using an electric guitar and then simulating acoustic guitar with a clean electric sound. This works better for me, and although it will not sound like a true acoustic, I feel that it is a better compromise.
The third option is having a separate acoustic guitar on one of those fixed guitar stands that holds the guitar at the correct height and in your normal playing position. The disadvantage with this method is the time it takes to position your arms and hands on and off the stand-held acoustic, and in reality you often do not have that time available.
Ultimately, none of these attempts really satisfied me, so I decided to search for an alternative hybrid option. Would it be possible to play both parts using a single instrument?
Research
My Mesa Rectoverb 50W Widebody 1 x 12 doesn't really do justice to the X-Bridge, so I split the signal, sending the electric sound to the Recto and the acoustic to an AER.
My Mesa Rectoverb 50W Widebody 1 x 12 doesn't really do justice to the X-Bridge, so I split the signal, sending the electric sound to the Recto and the acoustic to an AER.
Although I am aware that scientific research is advancing at great speed, it is not going to give me the ability to grow another pair of hands, so whatever solution I decide to use will always involve a compromise. More than ever before, there are now a growing number of guitars on the market, which offer different solutions. The Taylor T5, for example, is a fine instrument. It's a thinline F-hole guitar that features a hidden neck humbucker, a visible bridge humbucker, and a body sensor mounted to the inside surface of the top, utilising Samarium Cobalt magnets and humbucking coils. The acoustic-style bridge saddle makes it sound more like an acoustic with electric pickups, but the variety of sounds available are superb. Using a standard quarter-inch guitar lead, the output from all pickups feeds into the same amplifier, so you will need to consider some form of amp or channel switching here. However, I understand that with the use of a special lead it is possible to split the outputs.
Another hybrid option is the Line 6 Variax range. This offers a range of tones from their modelling algorithms, some of which are very impressive. The Variax has no conventional pickups, so all the sounds that are available are modelled from the signals picked up by the piezo sensors set into the bridge saddles. The disadvantage of both the Variax and the Taylor is that you are unable to play two sounds together. But Fender have recently addressed this very issue with the launch of the VG Stratocaster. Unlike the Variax, this is a real Fender Stratocaster with all the sounds you would expect from such a guitar, but with the addition of a Roland GK2A pickup fitted to the guitar, offering acoustic tones and alternate tuning. In my opinion, Fender's VG Stratocaster offers the best solution to date, but only if you are willing to spend the asking price of around £1200.
At the end of my research, I wondered if it were possible to achieve my goal using a guitar I already owned and loved. This would obviously be a lower cost option and I wouldn't have to own yet another guitar (although many guitarists, including me, would argue you can never have enough guitars!).
My choice
L.R. Baggs have launched the Control X preamp/mixer to allow onboard mixing of the acoustic and electric sounds.
L.R. Baggs have launched the Control X preamp/mixer to allow onboard mixing of the acoustic and electric sounds.
I settled on the L.R. Baggs X-Bridge. This is a replacement bridge unit for Stratocasters, which allowed me to use my own trusty guitar. The X-Bridge has the 'acoustic' transducer manufactured within the bridge as an integrated system and is available in three strat versions (see box), plus the T-Bridge for guitars with a Tune-o-matic style bridge.
The X-Bridge kit is supplied with the replacement bridge assembly, tremolo arm (where appropriate) and a replacement Strat jack socket. This jack socket is stereo so that the output from the acoustic pickup can be sent to a different amplifier to the regular Strat electric pickups. Fitting the X-Bridge was relatively straightforward and it wasn't long before my Stratocaster was converted. The standard five-way selector on the Strat is unchanged, so the standard pickup configurations remain. This is also true of the standard Strat volume pot. The compromise comes with the tone controls. The upper tone pot becomes a volume control for the X-Bridge acoustic pickup, and I chose to disconnect the lower tone pot completely from the circuit. The resulting configuration allows you to independently adjust the volume of the electric pickups and the bridge transducer and mix them in whatever combination you desire. (Note that since purchasing my X-Bridge, L.R. Baggs have launched the Control X preamp/mixer to allow onboard mixing of the acoustic and electric sounds.)
The sounds
The neutral tone from the AER Compact 60 Mk II acoustic amp complements the X-Bridge nicely.
The neutral tone from the AER Compact 60 Mk II acoustic amp complements the X-Bridge nicely.
Playing the X-Bridge output through a regular guitar combo (I use a Mesa Rectoverb 50W Widebody 1 x 12) gives a more acoustic-sounding tone than a clean standard electric guitar, but does not really give the X-Bridge a chance to shine. However, plug it into a recording setup, a PA or a dedicated acoustic guitar combo and wow! You have that acoustic sound. It has the punch, the dynamics and clarity of an acoustic, and you won't get any feedback when playing loud. The feel of playing an electric guitar is obviously different to that of an acoustic guitar. So it does feel slightly strange when you play acoustic-style parts on a Strat, even though you are hearing some very nice acoustic tones. I have played the sound of the X-Bridge to many people, and they might not like my playing, but they all agree that the sound is very impressive.
In use
To complete my setup, I recently purchased the excellent AER Compact 60 Mk II acoustic amplifier. This tiny amp has a very natural tone and complements the X-Bridge well. I am now able to take the standard electric pickup output from the Strat to my Mesa combo and the acoustic output to the AER. The result is a fantastic combination; I can switch from electric to acoustic extremely easily, I can blend the two tones together in differing amounts, and all the time I am playing my own favourite Stratocaster.
It is not just the ability to play both sounds and style from the same guitar, but having the capability to blend a mix of acoustic and electric is fantastic. Using mainly the acoustic sound, but with a bit of overdriven electric underneath is very effective in recreating double tracking techniques live. This is particularly impressive with slight panning of the two parts.
Last year, I played a gig of Who music, where my X-Bridge-loaded Strat really came into its own. Pete Townshend regularly uses a similar setup with his modified Strats, and if you listen to and watch any of his recent live work (such as 'Who Are You' at Live 8), you'll notice this technique at work. Other Who tracks where this is used are 'Behind Blue Eyes' and 'Bargain'.
So if you fancy the versatility of an acoustic sound from your Strat and don't mind making minor reversible alterations to your trusty guitar, I would definitely recommend the L.R Baggs X-Bridge (www.lrbaggs.com).  0

L.R. Baggs X-Bridge options
US Standard — works with 2 1/16-inch or similar E-to-E string spacing and two mounting posts.
Vintage — works with 2 3/16-inch or similar E-to-E string spacing and six screw posts.
Fixed Bridge — works with 2 1/16-inch or similar E-to-E string spacing (non-tremolo).

Published in PM July 2008