TU-3
Boss TU-3 Chromatic Tuner
Controls
- Button 1 - "Stream / Cent": At first glance, this button toggles between "Stream" and "Cent" tuning methods, but there's a lot more functionality described below.
- Button 2 - "Mode": At first glance, this button toggles between
- Tuning for Bass or Guitar
- Setting the number of steps or half-steps below standard tuning you may wish to tune your instrument
- Footswitch 1 - "Active/Bypass": Toggles the function of the pedal between "on" and "off". How this footswitch works is dependent on the output jack used.
Jacks
- Output 1 - "Output": When this output jack is used, toggling the footswitch will turn the signal on or off. The signal will be "on" for when the tuner is not engaged or in use, and the signal will be "off" when the pedal is being used to tune. Use this when you don't want people to hear you tuning up.
- Output 2 - "Bypass": When this output jack is used, using the footswitch on the TU-3 only turns the function of the tuner on and off. That means that whether the tuner is on or off, the instrument signal will always be going out on this jack. Use this when you don't care about people hearing you tune up.
- Power In - Standard 9-volt barrel-negative tip Boss-style power supply
- Power Out - The TU-3 *can* power other pedals if using a daisy-chain cord of Boss-style barrel-negative tip terminals, provided those other pedals use the same AC adapter
Bypass:Buffered
Like all Boss pedals, the TU-3 has a buffered bypass.
General Information
The TU-3 is an advancement the previous TU-2. The TU-2 was itself was a reimagining of the Boss TU-12h Chromatic Tuner.
Tuning Indicator
Setting the Tuning Calibration
By pressing both buttons at the same time, it's possible to reset the tuning calibration of the TU-3. Default calibration is A=440, but the calibration can be set as low as A=436 and as high as A=445.
Additional Tricks
If playing outdoors in sunlight, it's possible to turn up the LED brightness in order to see the tuning indicator despite sun glare. Hold down Button 1, the "Stream / Cent" button for 2 seconds. The tuning indicator section will briefly display 5-6 vertical bands to indicate you're in high-brightness mode. To revert to standard brightness, hold down Button 1, the Stream / Cent button, again for two seconds, and the TU-3 will again display the tuning indicator in standard brightness.
Pedal Manual
https://static.roland.com/assets/media/pdf/TU-3_e04_W.pdf
Phase Inversion
Schematic
Artists
- Nuno Bettencourt
- Chris Cornell
- Billy Duffy
- Marty Friedman
- Paul Gilbert
- Scott Gorham
- Dave Grohl
- James Hetfield
- Gus G. (Konstantinos Karamitroudis)
- Johnny Marr
- J Mascis
- Duff McKagan
- Dave Navarro
- Nick Oliveri
- Buzz Osborne
- John Petrucci
- Matt Pike
- Alex Skolnick
- Slash
- Michael Sweet
- Steve Vai
- Brad Whitford
- Additional Sources
