Generally, your Stomp Classic 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.

Yes, the Stomp Classic is discontinued.

Our currently available tuners are the StroboStomp HD, StroboStomp LE, StroboStomp Mini, StroboPLUS HDC, AutoStrobe Model 490, AutoStrobe Model 490-ST, AutoStrobe Model 590, and SC-5000 II.

We do service discontinued products.

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 $80.00 US plus a shipping charge for all Mechanical Peterson tuners received and a minimum charge of $40.00 US plus a shipping charge for all LCD Peterson tuners (unless subject to Peterson warranty). Payment options include PayPal, VISA, MasterCard, AMEX 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

Email: techwest@petersonemp.com

9VDC - Regulated - Center negative - At least 85mA

Partial list of regulated power supplies:

• Voodoo Lab Pedal Power 2 (Eight isolated 9VDC 100mA regulated outputs)
• Dunlop DCB-10 DC Brick (10 outputs)
• Visual Sound 1-Spot (9V fully regulated output)
• Carl Martin Big John 9v Power Supply (Seven 9VDC outputs 600mA total)
• Sanyo Pedal Juice
• T-Rex Fuel Tank
• Godlyke PA9 Power All (9V 800mA regulated output)
• Boss PSA120 adapter (9V 200mA regulated)

DO NOT use the Boss ACA120 Unregulated power supply! Boss ACA, Danelectro DA1, RadioShack, etc., do not have a voltage regulator and are not suitable.

As always with any pedal, be careful - check voltage ( 9V regulated ) & polarity (positive barrel-negative inner sleeve) first and don't overload the power supply's ampere rating by daisy chaining too many pedals from a single supply.

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 precise. They require very fine 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.

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.

Chrome needs access to /dev/hidraw*, so either set "chmod a+rw /dev/hidraw*" or start chrome as root with the --no-sandbox option

*Some Ubuntu based distros do not allow running Chrome as root with the --no-sandbox option enabled. -Running as root without --no-sandbox is not supported. See https://crbug.com/638180. You can however run Chromium as a normal user and invoke that option.

Some users have reprted a fix by adding a new udev rule as follows: KERNEL=="hidraw*", SUBSYSTEM=="hidraw", MODE="0664", GROUP="plugdev", ATTRS{idVendor}=="2368", ATTRS{idProduct}=="*SEE BELOW"

* Some Peterson products operate in two different modes with individual product id's for firmware update operations. Multiple rules may need to be created. Here is the list of Peterson USB product ID's

idProduct =

Stomp Classic = 8002
StroboPLUS HD = 0003
StroboPLUS HD Firmware Mode = 8003
StroboClip HD = 8004
StroboStomp HD = 8005
StroboPLUS HDC = 0006
StroboPLUS HDC Firmware Mode = 8006

If there is trouble connecting or reconnecting as a product is switching modes, ex: StroboPLUS HDC product id 0006 to StroboPLUS HDC Firmware Mode 8006 run the command:

"sudo chmod a+rw /dev/hidraw*"

This command will solve any "waiting on user input" or if the update button in Peterson Connect is unresponsive. The command may need to be executed more than once.

A Sweetener is a set of cent offsets or a deviation from generic Equal Temperament interval spacing traditionally used in tuning. Tuners made by Peterson, including the Stomp Classic, contain many choices of Sweeteners, in other words, several presets with differing interval spacing relevant to the instrument being tuned. If you’ve never been happy with how your instrument tunes up with your present tuner, a Sweetener could be just the thing to change that without any modifications whatsoever. The Stomp Classic offers 25 unique and very accurate tweaks which often make all the difference.

Currently, the following products are compatible with Peterson Connect:

• StroboClip HDC
• StroboStomp Mini
• StroboPLUS HDC
• StroboClip HD
• StroboStomp HD
• StroboStomp LE
• StroboPLUS HD
• Stomp Classic Pedal Tuner / Active DI

Your Stomp Classic is accurate to 0.1 cent (1/1000th of a semitone). It’s important to note, that unlike other tuners which list the detection accuracy as the main specification, the Stomp Classic detection AND display accuracy is 0.1 cent due to its high definition display.

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.

A Peterson TP-3 clip-on tuning pickup is a very versatile device with a 1/4" connector 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.

A Peterson Pitch Grabber Mobile Tuning Clip utilizes a 1/8" connector for use in mobile phones or tablets with software tuners.

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

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 $80.00 US plus a shipping charge for all Mechanical Peterson tuners received and a minimum charge of $40.00 US plus a shipping charge for all LCD Peterson tuners (unless subject to Peterson warranty). Payment options include PayPal, VISA, MasterCard, AMEX 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

Email: techwest@petersonemp.com

On-Board Sweeteners will be the only Sweetened Tunings that your tuner will be aware of when a custom configuration is loaded. All other Sweetened Tunings that came pre-loaded on your tuner will not show in your Sweetener List when a custom configuration is active.

'Presets' allow you to combine any of the On-Board Sweeteners with other settings that your tuner offers such as Concert A, Global Cent Offset and Transposition. Up to 10 presets can be stored for quick access on your hardware. You can access these other settings by hovering your mouse over the Preset and clicking the gear icon.

• Configure the order and number of sweetened tunings in your device's available tuning list.
• Design up to 10 custom presets using the tunings from your sweetened tunings list.
• Create your own sweetened tunings with custom offsets and note names.

Yes, the legacy desktop Peterson Connect app will still communicate with our servers to search for new firmware and configuration information for your device. This is a convenience for early adopters of the technology and will be minimally supported and no longer distributed.

WARNING: Running the standalone desktop app and the Chrome add-on concurrently can cause USB driver conflicts and result in corrupted data. Uninstall or disable the Peterson Connect Chrome add-on before opening the older standalone desktop application.

The number denotes the octave, the higher the number the higher the octave. A standard guitar tuning is E2 A2 D3 G3 B3 E4. If using a very light gauge set, it is possible to break a string if tuned to too high an octave. For example tuning a guitar’s high E string to E5 instead of E4 will most certainly result in breakage.

In the heat of the moment this can happen on stage unless the tuner has an octave indicator like the Stomp Classic.

There are two three-position switches and one two-position switch on the rear. The switch on the left has to do with operational modes and enables the following:

1. MON: Monitor operation only. The tuner is on and displays state of pitch at all times, whether muted or un-muted.

2. TB: True Bypass operation only. Tuner is active and connected to the signal path only when muted, otherwise it is electrically off and physically out of the signal path.

3. DI: DI mode. Tuner is active and its display visible only when muted, DI is active at all times but also mute-able.

The switch on the right controls the signal level before it enters the DI circuit to ensure a clean output with lots of headroom and enables the following:

1. 0dB: DI output setting suitable for passive acoustic and bass guitar signals.

2. -10dB: DI output setting suitable for active acoustic and bass guitar signal.

3. -20dB: DI output setting suitable for active acoustic and bass guitar signals.

The switch in the lower middle is a ground lift switch and is used to avoid hum caused by ground loops.

Yes, to activate this feature, Press the MENU button until the Sweetener parameter flashes (default is A440) and then press the + or – (plus or minus) button to change the value to “GTn”. The tuner will now substitute EADGBE with 654321.

The Stomp Classic Concert A control can be adjusted in 1Hz increments, the default value is 440.0

1. Plug the Stomp Classic into the keyboard or piano ¼” output socket.

2. Press the MENU button until “A440” flashes.

3. Play the A above middle C on the piano or keyboard.

4. If the Strobe image moves clockwise, increase the Concert A value on the Stomp Classic by pressing the + (plus) button until the image hovers or stops.

5. If the Strobe image moves counter-clockwise, decrease the Concert A value on the Stomp Classic by pressing the – (minus) button until the image hovers or stops.

6. The Concert A pitch of the piano will be displayed on the screen

Press the MENU button until the DROP parameter flashes (default is 0) and then press the – (minus) button to change the value to “-1”.

Yes you can. The guitar can be plugged into the Stomp Classic, the open strings tuned, then checked by fretting each string at the 12th fret. The Stomp Classic will show the tiniest flaw, making your intonation results as good as they possibly can be.

On the base of the Stomp Classic, there are specially designed lugs which can be used to attach the pedal securely to your board. Simply back the screws off slightly and swing the lugs out; you can then screw or bolt the tuner to the board. No tape or Velcro needed.

It’s there to protect the inserted jack plugs from “misplaced onstage foot-fall”. Sort of like a roll-cage to prevent singers and other wandering band members from stomping on your jacks!

Yes, press the MENU button until the DROP/CAPO parameter flashes (default is 0) and then press the – (minus) button to change the value to “-1” for one half-step down, “-2” for 2 half-steps down etc.

Yes, the Stomp Classic is fully chromatic and can be used for any open tunings.

The Stomp Classic and its predecessors are easily the most popular and effective pedal steel guitar tuners in the world today. In fact the more complicated the tuning copedant, the more the Stomp Classic excels. If you use currently use a chart of offsets, such as the Jeff Newman tuning chart, the Stomp Classic can vastly simplify your tuning process, it has the Jeff Newman offsets built-in and is used by many pedal steel guitarists.

Of our currently available tuners, StroboPLUS HDC, StroboStomp HD, and StroboStomp LE have pedal steel Sweeteners and are very popular among the pedal steel community.

No, the Stomp Classic is a stage tuner and uses auto-note-sensing only.

The Stomp Classic allows you to program presets, these are groups of settings you can choose for specific instruments comprising of Sweetener, DROP & Concert A values. The preset shows itself as a number displayed on the upper left of the Stomp Classic’s screen. The presets can be easily and quickly recalled.

Yes, and here’s why. Any professional tech will tell you that it’s important to have the same standard of tuning among all tuners used on stage. On professional stages, where there is a stage backline crew, instrument tuning will invariably be carried out using a Peterson strobe of some sort, it is an industry standard. In the event that a guitarist or bassist requires a tuner on stage, a pedal tuner is usually the preferred format. Unfortunately, the majority of pedal tuners are designed to be less accurate than other formats. So having been strobe tuned offstage, instruments could then be left to the vagaries of inaccurate pedal tuner onstage, were it not for the Stomp Classic which matches the other formats exactly in terms of accuracy and calibration. Added to that, the Stomp Classic’s mute-able active DI allows silent guitar changes by guitarist, bassist or tech without involving channel-muting and the intervention of console personnel. Also, for electric guitar, a second signal can be sent to a different amp or FX chain using the DI output which can also be used for re-amping in the recording studio. With its solid steel enclosure, the Stomp Classic is built for the road and offers more versatility than any other pedal tuner.

Yes, it’s called “ACU”. To choose this setting, press the MENU button until the Sweetener parameter flashes (default is EQU) and then press the + or – (plus or minus) buttons to change the value to “ACU”.

The Stomp Classic has a preset for Sweetened 6 string electric guitar called GTR, this preset is useful for short-scale electric guitars like Les Pauls or guitars with three saddle bridges like Telecasters. To choose this setting, press the MENU button until the Sweetener parameter flashes (default is EQU) and then press the + or – (plus or minus) buttons to change the value to “GTR”.

For 12 string electric guitars like Rickenbackers, the Stomp Classic has a special preset called 12S for the standard and octave strings. To choose this setting, press the MENU button until the Sweetener parameter flashes (default is EQU) and then press the + or – (plus or minus) buttons to change the value to “12S”.

The Stomp Classic can handle any type of bass, be it a 4, 5, 6, 7, 8 or 12 stringed instrument.

For bass guitar, upright bass or contrabass, the Stomp Classic has a special preset called “BAS”. To choose this setting, press the MENU button until the Sweetener parameter flashes (default is EQU) and then press the + or – (plus or minus) buttons to change the value to “BAS”. For basses with the Buzz Feiten Tuning System built-in, there is the BFB preset which has the correct offsets for tuning and intonation pre-programmed, select it as described above.

Then tune the strings, image moving clockwise means you’re too sharp, image moving left means you’re too flat. Tune until the image displayed on the tuner screen stops moving continuously in any one direction. The Stomp Classic also has a high quality built-in active DI, which is mute-able, a real boon for bass players. In short, there is no more bass-centric pedal tuner than the Stomp Classic!

No, not unless they are isolated. To tune overtones and view harmonic content, we recommend the Peterson AutoStrobe range of strobe tuners.

For Dobro or resonator guitars, the Stomp Classic’s DBO Sweetener changes the Equally tempered third intervals in Open A, D & G to Just Intoned thirds, which makes for a much smoother and pleasant sound. The DBH Sweetener pitches the third intervals halfway between Equal and Just.

To choose this setting, press the MENU button until the Sweetener parameter flashes (default is EQU) and then press the + or – (plus or minus) buttons to change the value to “DB0” or “DBH” as desired.

Of our currently available tuners, StroboStomp HD, StroboStomp LE, and StroboPLUS HDC include the DBO and DBH Sweeteners.

The Stomp Classic can save any of its settings together as a preset/favorite.

Press the menu (far left) button until the parameter that you want to change starts flashing (most commonly Sweetener) Press the +/- buttons to select the value you desire for that parameter. Use the menu to select additional parameters and the +/- button to adjust their values.

When you have finished adjusting all values to your liking, wait for the flashing value indicator to stop.

Next, press and hold the + button until the screen shows the word ‘ADD’. If you do not see the word ‘ADD’ but do see a dash(-) in the lower right corner, the values you have chosen already exist as a preset and cannot be added again.

When the ADD process finishes, that preset will be added to the list of up to 9 preset spaces available. You can now simply press the preset button to quickly cycle through your presets (favorites).

To remove or delete a preset, hold the minus (-) button. The letters ‘REM‘ will show and the preset will be deleted.

The preset containing EQU ( equal temperament ) will always be part of your preset list unless you intentionally remove it by using the method above. Note that when parameters are set to their default setting, they will not show on the screen. EQU is the default sweetener, 440HZ in the default Concert A reference and 0 is the default Drop /Capo value.

If Windows 10 or 11 presents the error "USB device can't be recognized" when your tuner is plugged in, this is usually caused by a corrupt automatic driver installation.

A restart of your computer will usually solve this issue.

Click Windows/Start button

Select Power

Select Shut Down

After your computer powers off, restart your computer, plug in your tuner, and the USB drivers should install automatically.

Are you using a stereo plug (TRS)? Your Peterson Pedal Tuner ( Stomp Classic , StroboStomp 1 & 2 ) uses the input jack to switch the power on and will not work properly if you are using a cord with a stereo plug. For correct operation, use only cables/cords with standard mono 1/4" plugs.

Yes, when switched to TB on the rear, the Stomp Classic operates in 100% True Bypass. Please note that in this setting, the active DI is non-operational.

The tuner enclosure is made from solid steel, with a rugged 3PDT stomp switch and quality Neutrik® XLR and ¼” jack sockets.

Yes, the Stomp Classic can be updated via its USB socket on the left hand side of the tuner. Plug your Stomp Classic into your computer, go to Peterson Connect and check for firmware updates.

No, the Stomp Classic remains active when switched on until it is muted. According to the user’s wishes, the Stomp Classic can operate in 100% True Bypass in which the tuner is electrically off and physically separated from the signal when muted, or it can operate in Monitor Mode, with the tuner on all of the time, tracking the signal, whether muted or not.

Yes, the superior tuning accuracy will not only improve your guitar’s sound, using it will help your ear to discern fine differences in pitch.

Yes, due to its high definition LCD display, the Stomp Classic can be read in the full glare of the sun or directly in front of a 1KW stage lighting fixture, well beyond the point where other tuners are rendered useless.

3 years parts and labor from date of purchase officially, but due to the quality of our products, we have a very generous case by case policy.

No, the Stomp Classic is plug-in only for electric instruments. You can, however, use an external microphone with it to tune instruments which do not have pick-ups. For tuners with built-in microphones, see the StroboPLUS, StroboRack or AutoStrobe tuners.

Google Chrome, Chromium, Microsoft Edge, Opera, Vivald and Comodo Dragon all support Peterson Connect which is built on webHID, a feature more and more browsers are adopting. As other browsers incorporate the webHID feature, Peterson Connect will immediately work in that browser. Those who prefer a different browser can design sweeteners and presets in any browser. Only the data transfer to your device relies on Peterson Connect.

Peterson Connect will not function in Safari. Custom Configuration, Sweetener Design, and Tempo Map designer will function in Safari, but Safari does not support webHID therefore data transfer to your device is not possible.

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.

Aside from a fresh 9V battery or a 9V power supply, the Stomp Classic is switched on when a 1/4" mono instrument cable is plugged into the input on the right side of the chassis. You will not see any sign of life from the unit without this cable plugged in. A stereo cable will not turn the Classic on.

The LCD screen of your Virtual Strobe Tuner may go dim for a short time right before the battery runs out. Although the batteries may not be old, check to see if replacing them corrects the LCD brightness.

Powering the unit with the provided or suggested power supply can also help determine if the LCD screen is in fact failing. If the LCD is still dim after changing the batteries or plugging the unit directly into a wall outlet, please open a help ticket so we may assist you further.

The LCD screen of your Virtual Strobe Tuner may go dim for a short time right before the battery runs out. Although the batteries may not be old, check to see if replacing them corrects the LCD brightness.

Powering the unit with the provided or suggested power supply can also help determine if the LCD screen is in fact failing. If the LCD is still dim after changing the batteries or plugging the unit directly into a wall outlet, please open a help ticket so we may assist you further.

The Hz calibration range of your Stomp Classic is 390Hz to 490Hz. The default setting is Concert A 440Hz.

In order for the website to be able to program your device over the USB connection, it first has to "register" the internal ID, so it can perform the USB communication.

Although you may have registered your warranty and serial number, until the site gets a read on your connected device for the first time, it cannot pair that physical device to your warranty registration and serial number and therefore will not allow it to be programmed. This is called 'pairing'.

Be sure to be logged in to the same account in which you registered your warranty. If using Peterson Connect for Google Chrome, you will be asked to 'pair'

In order to configure your device, the Peterson website needs to have previously paired your device with your warranty via Peterson Connect when your device is connected via USB. If you've registered your product but have not yet connected, you'll need to do that before you are able to configure your product. When the website detects your device it will prompt you to pair with your product's serial number. If the website detects your device while registering your warranty, it is automatically paired.