Is the accuracy the same for all Peterson tuners?

Yes, the accuracy is within 0.1 cents (1/1000 of one semitone) as with all Peterson Strobe Tuners. An important thing to note is that Peterson Strobe Tuners have ultra high definition displays, so not only are they highly accurate in detecting a note but they have the ability to display that accuracy. Other products claim accuracy but do not have the high definition screen to display the level of accuracy in which they claim. If you cannot see the accuracy, it is of little value. Only Peterson provides High Definition Strobe Tuning.

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How do I read a strobe display?

Basically, the strobe image appears to travel to the left if your instrument is flat of the desired pitch and to the right if it is sharp. On earlier models such as the StroboStomp 1, StroboStomp 2, VS-1, VS-II and V-SAM, the strobe image travels upward if your instrument is sharp and downward if your instrument is flat of the desired pitch.

Adjust your instrument until the pattern is as close to still as possible. Strobe displays are 'real-time' and extremely high definition. They require very precise tuning adjustments to stop the display because the frequency/pitch of any instrument is never totally stable.

You'll quickly learn to read the display, make the most precise adjustments and appreciate the high resolution that only a Peterson provides.

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What should I do if my new Peterson product doesn't seem to work properly?

If you've first tried all of the solutions offered here, please contact Peterson directly. It is important that you do NOT return the product to the store in which you purchased it without Peterson instructing you to do so. If your unit is problematic, we would like to limit the chances of another customer purchasing the returned unit. Always arrange for product service or replacement directly with Peterson.

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Which Peterson products work with Peterson Connect?

Currently, the StroboPLUS HD and the Stomp Classic Pedal Tuner / Active DI are compatible with Peterson Connect.

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How do I find out how far out of tune my guitar is in cents?

Pluck a string and adjust the cent value by simply adjusting the cent control until the strobe image is stationary (only fluctuating around a fixed position and not shifting in one direction over time). In this case, you are tuning the tuner to the instrument. When the image comes to rest, the accompanying numeric cent display indicates the distance from 00.0 cents.

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Does my tuner require calibration?

Generally, your tuner will not require calibration and should remain perfectly accurate if it has not been damaged.

Unlike more modern Peterson strobes, legacy models such as the Peterson 400, 420, 450 and 700 do require occasional calibration.

If you require service, please open a support ticket and return the tuner for repair.

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How do I send my product in for repair?

If you need to send your tuner in for repair, please open a support ticket.

All products returned for service must have a support ticket number on the outside of the box as well as on the accompanying paperwork on the inside of the box. If you have not registered your tuner, you must do so before returning it. Include a description of your problem. Please be specific about the type of malfunction as well as the conditions under which it occurs.

There is a minimum charge of $60.00 US plus a shipping charge for all Peterson tuners received (unless subject to Peterson warranty). Payment options include C.O.D., VISA, MasterCard, and Discover Card.

NOTE: For international (non-USA) repairs and for all Conn tuner repairs, a different procedure may apply. If you would like an advance estimate for service, you must include a request in writing with the tuner you ship.

Contact and Shipping Details:

For service of Peterson tuners:

Peterson Electro-Musical Products, Inc. 11601 South Mayfield Ave. Alsip, IL 60803 USA

TEL: 708-388-3311 (ext. 143) FAX: 708-388-3341


For service in Europe:


Contact: Ulli Thiel or Thomas Hoch

TEL: +49 40 642 15933 FAX: +49 40 642 21735 Email:

For service of Conn tuners:

Peterson Service 105A East Penn St. Hoopeston, IL 60942

TEL: 217-283-5010 FAX: 217-283-5161

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I often tune my acoustic instrument in a loud environment. What's available to help with that?

When tuning an acoustic instrument in an environment where you cannot control the background noise, like at a gig or loud band hall, a vibration pickup is a very nice alternative to using the built-in microphone.

For instruments with a flat resonating surface, you can use a suction cup tuning pickup to reduce ambient noise interference.

A Peterson TP-3 clip-on tuning pickup is a very versatile device that can be clipped onto any portion of the instrument that vibrates, such as the headstock of a guitar or the bell or lead pipe of a horn.

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Is there a carrying case available?

We have carrying cases available that are very useful if you will be frequently traveling with your Peterson tuner. You may purchase your case directly from us at Peterson or from your local dealer. Cases are available for the AutoStrobe™ line and the VS-1, VS-2, and V-SAM tuners. The StroboClip and StroboPLUS come with packaging that has been designed to protect your tuner.

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Stomp Classic Version 1.0.05

Tuesday, September 24, 2013 9:40:00 AM EDT

  • Various Bug Fixes

Stomp Classic Version 1.0.04

Wednesday, August 7, 2013 10:37:00 AM EDT

  • Note display default is now the sharp ( # ) version of en-harmonic equivalents. Previously a combination of sharps and flats ( #/b ) were used.
  • Peterson Connect now supports characters P and L for custom octave names ( Pedal and Lever indicator for Steel ).

Stomp Classic Version 1.0.02

Sunday, January 1, 2012 2:01:30 PM EST

  • Enables Peterson Connect functionality
  • Various Bug Fixes.

StroboPLUS HD Version 1.1.7

Friday, September 4, 2015 3:08:00 PM EDT

  • Various offsets for Accordion Sweeteners have been corrected.

StroboPLUS HD Version 1.1.6

Thursday, July 9, 2015 10:00:00 AM EDT

  • Fixes an incorrect battery level reading that occurs on units from a recent production run. ( June 2015 ) Otherwise, it is the same as 1.1.4.
  • Update will reset custom configurations but you will be prompted to reinstall your saved configuration immediately after update.

StroboPLUS HD Version 1.1.4

Monday, June 15, 2015 1:31:00 PM EDT

  • The time required for holding the power button in order to shut down has been reduced from 2 seconds to: 1.5 seconds or 0.8 seconds if no edit menus are active.
  • Pressing the select button ( pushing in on encoder wheel ) will increment through each of the parameters until the parameter you want to edit is blinking, then edit the value by rotating the select knob. Some users found this easier than turning the encoder wheel to select a parameter to edit. Both ways work for backward compatibility.
  • Bug fix: If “Preset” was the last selection in Strobe-Tune or Audio-Tune modes, then when first entering Metronome mode, the BPM menu was not locked in the edit menu, as it is supposed to be.

StroboPLUS HD Version 1.1.3

Tuesday, September 2, 2014 9:47:00 AM EDT

  • Bug fix for metronome upgrade only. The tempo menu will now properly start after a power cycle in either the TENTHS or UNITS menu, based on how it was last used.
  • Fixes a bug that first appeared in versions 1.1.0 to 1.1.2 that did not correctly apply offsets to more than one of the same note in the same octave. Versions 1.0.9 and previous did not have this bug and worked correctly.

StroboPLUS HD Version 1.1.2

Tuesday, May 6, 2014 1:16:00 PM EDT

  • Various Bug Fixes
  • Corrected offsets for the LA6 sweetener.

StroboPLUS HD Version 1.1.1

Monday, April 7, 2014 9:42:00 AM EDT

  • There are two additional pedal steel guitar Sweeteners added. SH6 & SH9 - Sid Hudson’s settings for E9 and C6.
  • Sweetener value shows for the indicated preset, while selecting a preset.
  • Version 1.1.1 was released concurrently with version 1.1.0 and contains all features from version 1.1.0 listed below.

StroboPLUS HD Version 1.1.0

Monday, April 7, 2014 9:42:00 AM EDT

  • Added 32 Metronome Practice Patterns. These patterns are accessed via the preset button at the end of any user defined presets.
  • Metronome Practice Patterns allow saving a tempo setting for each pattern. Select the pattern, set the tempo and hold the preset button. The right most digit in tempo will go in circular pattern to show that the tempo was saved as part of that preset.
  • There are now 60 additional user defined metronome presets allowed, for a total of 70.
  • Presets wrap upward, but not downward, in all modes.
  • In metronome mode, the settings show for each preset and are implemented immediately as the indicated preset is changed. Earlier firmware versions required you exit the preset selection menu to see the preset parameter values.
  • The “E” (edited) icon is displayed when the current parameter settings do not match the last saved values of the indicated preset, in Metronome mode.
  • The meter parameter display is updated to the first bar of a tempo map when a new tempo map is first selected. A bug in previous versions had displayed the previous value until the bar value changed.
  • A user controlled ROOT parameter has been added for each sweetened tuning (temperaments included) for both audio and strobe tuning modes. Select the sweetener and hold the selector knob in and rotate it until the Note indicator says C which is the default root. Release the selector knob and rotate it to the root note you desire. The Sweetener name will now flash alternating between the root selection and Sweetener. The root will be set back to C whenever you change the Sweetener or restart the StroboPlus, it is not saved.
  • Tympani tuning: “TYM” has been added to available sweeteners. This setting adjusts the strobe pattern to be more readable while tuning tympani drums.
  • The offset for note Bb in temperament RAM was changed from -1.4 to +1.4. This was an error in previous releases.

StroboPLUS HD Version 1.0.09

Wednesday, July 17, 2013 1:02:00 PM EDT

  • Timeout for editing a parameter is increased from 4 seconds to 8 seconds.
  • Timeout for selecting a parameter is reduced from 4 seconds to 3 seconds.
  • When the backlight transitions from “Active” to “Inactive” levels, it now fades between these levels, instead of an abrupt change in the light level.
  • The timings for switching the backlight from the “Active” level, to the “Inactive” level, have been adjusted slightly as necessary to account for the other changes.

StroboPLUS HD Version 1.0.08

Tuesday, April 16, 2013 4:31:00 PM EDT

  • Tempo selection in Metronome Mode defaults to whole units and not tenths for BPM.
  • Note display default is now the sharp ( # ) version of en-harmonic equivalents. Previously a combination of sharps and flats ( #/b ) were used.

StroboPLUS HD Version 1.0.06

Monday, March 4, 2013 4:41:00 PM EST

  • Always defaults to Auto Note detection when Strobe Tune mode is started.
  • Peterson Connect now supports characters P and L for custom octave names ( Pedal and Lever indicator for Steel ).
  • Octave icon will NOT show on the display when a custom note name and octave are specified in Peterson Connect.

StroboPLUS HD Version 1.0.05

Monday, February 18, 2013 4:24:00 PM EST

  • Bug fix for inability to turn on when battery level is too low.
  • Battery charging indicator improved.

StroboPLUS HD Version 1.0.04

Tuesday, February 12, 2013 5:14:00 PM EST

  • Tap Tempo now works with selected Accent Pattern in Metronome Mode.
  • The Voice for the Audio Tune mode is a sawtooth below C7. At C7 and above it uses a sine wave.
  • Pressing and releasing the power button when a Tempo Map is selected will set the bar value to 1. This is a shortcut for getting back to the start.
  • Several changes to the battery charging and battery level indication.
  • StroboPlus can be powered with USB power, even if the battery is not installed.
  • The battery ICON does NOT show if the battery is NOT installed.
  • Various Bug Fixes.

StroboPLUS HD Version 1.0.03

Saturday, January 5, 2013 2:03:00 PM EST

  • Initial Release.

Peterson Electro-Musical

Products Inc.

11601 S. Mayfield Ave.

Alsip, IL 60803

Ph. 708-388-3311

Fax 708-388-3341

Business Hours

8:00AM - 5:00PM CST M-F