Mooer, the maker of micro-sized guitar effects pedals, brought back the Mooer Tender Octaver in a micro version (MK II) and added a pro version. If you’re one of the many musicians who used and loved the Mooer octaver when it first came out, you’re likely excited about this reissue.

If, however, you missed out the first time, you’re in luck! And you also probably have a lot of questions about this little pedal, including whether or not it lives up to its claims, how it improves on the original, and how the micro is different from the pro. Well, we’ve got answers. Keep reading for an in-depth review of the Mooer Tender Octaver plus detailed information on using octavers.

What is an Octaver, Anyway?

An octaver is a type of pedal. What’s a pedal? Simply put, a pedal gives flavor to your sound. It typically goes in between the guitar and amp (though not always); you can use several different pedals to layer sounds and achieve unique tones. Most gig players use extensive pedalboards to house all their pedals, which can range from extremely basic to very complex.

Speaking of lots of pedals, it’s true--there are a lot of pedals out there. Pedals range from gains boosters to wah-wah effects to amp emulation and everything in between. The Mooer Tender Octaver is a type of pedal known as a frequency effect (FX) pedal. Here are a few other common pedals:

  • Gain-staging effects (these are extremely complex and varied, but popular gains pedals include overdrive pedals to help kick your sound into overdrive, volume control, and compression)
  • FX pedals (these include EQ pedals, used to correct frequency imbalances, wah-wah and envelope filters, and pitch shifters like the Mooer Octaver)
  • Modulation effects (including tremolo and vibrato, chorus and flanger, and phasers)
  • Time effects (delay and reverb)

Other common pedals are loopers and instrument modeling.

How Do Pitch Shifters Work?

Pitch shifters are a kind of FX pedal. They either raise or lower the pitch of the guitar signal (some do both) and then harmonize the shifted pitch with the original pitch. Some pitch shifters even allow you to “dial in” chords.

Here’s one famous example of how an octaver can be used to great effect: when the White Stripes released their iconic classic “Seven Nation Army,” they didn’t have a bass player. Instead, the famous bass-like riff was created with a DigiTech Whammy pedal.

When Should You Use an FX Pedal?

Pitch shifters can create interesting sounds, but beware--the more you alter pitch, the less dynamic and realistic your sound. That’s not to say you shouldn’t use an FX pedal (we think you should), but it is to say that how you use an FX pedal should be carefully considered.

You can use an FX pedal to get the following:

  • Bass sounds (if you don’t have a bass player or don’t want to use a bass guitar)
  • Fuzz
  • Distortion

While everyone has an opinion on pedals, there’s no right or wrong, and the bottom line is that you should try a pedal before making a final decision.

Choosing the Right Octave Pedal

There are two types of octave pedals: analog and digital. Analog pedals are the simplest, electronically speaking, and the oldest. They are limited by the fact that they can only track with a single note and can usually only go up or down by a single octave. If you start to play a chord, most musicians find an analog pedal will fail.

This isn’t always a problem; sometimes these simpler pedals are preferred by musicians, especially for their unique sounds. Digital pedals, however, while more complex, can track with chords and have a wider octave range (some even include drive modes that are built in). Some musicians argue, however, that this kind of extra complexity is unnecessary.

What many people do agree on when it comes to octavers, however, is that fuzz is awesome, and an octave pedal can help you get it. Jimi Hendrix is the obvious master of fuzz (he used an octaver plus distorter to get the sound), but you can also hear early fuzz on the Kinks’ “Girl You Really Got Me.”

We’ll repeat this again and again in this article, but at the end of the day, finding your unique sound is what’s important. The good news is that an FX pedal can help you get there!

What Makes the Mooer Tender Octaver Unique?

In May of 2018, Mooer announced that it was bringing back its Tender Octaver micro pedal due to “huge demand and a mass of inquiries from musicians across the globe.” The company explained that it was keeping the simple controls and tiny size of the original pedal, with some unique updates.

In a separate press release on the same day, Mooer also announced that it was releasing the Tender Octaver Pro for those who wanted to expand on the original micro pedal’s features. Both pedals have been warmly received by the music community at large; keep reading to learn what you can expect from each.

The Tender Octaver MKII

Mooer’s micro octaver is the Tender Octaver MKII, and it lives up to the micro part of its name--it’s tiny. It’s just under 100mm (about four inches) deep and half as wide and weighs a mere 160 grams (about a third of a pound).


It is housed in a heavy-duty aluminum alloy and has only three controls: the sub control, the upper control, and the dry control (volume). The MKII is an analog polyphonic octave pedal with two algorithms and a separate mode, all three of which Mooer has updated.


The fat algorithm contains what Mooer calls a “huge bassy lower octave”; it’s ideal for simulating a bass guitar. The tight algorithm has a “shaper upper octave bite” and is great for shredding and playing fusion. Finally, the octaver’s swell mode provides “automatic volume swelling of the harmony voices,” and is used often for simulating a twelve-string guitar or creating soundscapes.

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The Tender Octaver Pro

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Mooer explains that the reason behind the Pro version of the Mooer Tender Octaver is lots of requests from musicians who liked the original but want additional features. For these artists, Mooer has added the following effects to its original harmonization and pitch shifting effects:

  • Whammy
  • Detune chorus effects
  • Dedicated controls for dry, sub, and upper tones (plus, the sub and upper each have dedicated tone and pitch controls)
  • Smooth control for auto ambient volume swells
  • Stereo outputs
  • Storable user presets
  • Dedicated footswitch

What Do We Think About the Micro and the Pro?

Our first thoughts are on the Pro--it’s too much. The beauty of the micro was its simplicity, and we feel the Pro simply clutters things up too much.

When it comes to the Micro, however, we think Mooer is on to something. It is about as simple and basic an octaver as you can make, but we think that makes it perfect. It’s not large or bulky or full of switches, so if you want to focus on playing, it’s ideal. It’s also ideal if your pedalboard is already cluttered, and it’s a small, inexpensive pedal that gets the job done admirably.

The Magic of Simplicity

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As we’ve already mentioned, the octaver has ultra-simple controls. This means it’s a breeze to explore and learn to use, but you also have some flexibility in how you combine effects. You can blend the upper and lower octaves as well as the dry, plus there’s a stomp switch.

Power isn’t a problem for this little pedal. It comes with a true bypass and runs on a power adapter or a 9V battery--nothing fancy or out of the ordinary here.

Sound is where the octaver shines. Thanks to its simplicity, it’s able to deliver what it promises: an organic, legendary tone that doesn’t fall prey to artificial sounds. You can even use it for professional-level gigs if you’d like to.

How Does the Mooer Tender Octaver Compare to the Competition?

To get a better idea of whether or not the Mooer Tender Octaver is right for you, we thought we’d compare it to three of the top octavers currently on the market.

Mooer Tender Octaver vs. DigiTech Whammy

We’ve already mentioned the DigiTech Whammy (it’s how the White Stripes got their distinctive sound on “Seven Nation Army”), and there’s a good chance you’ve probably already heard of the octaver--it’s a legendary classic.


It is, however, the opposite of simple, and instead of providing simple octave shifts it also provides whammy effects like tremolo. Plus, it’s a lot bigger than the Mooer octaver.


This isn’t necessarily a bad thing, but at almost three times the cost of the micro, you have to ask yourself if it’s worth it. If you find yourself leaning heavily on pitch effects and want to explore your options, the DigiTech Whammy is probably a better option. If, however, you want simple and clean or want only a pitch shift, we think the Octaver is the pedal for you.

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Mooer Tender Octaver vs. Electro Harmonix Pitchfork

The Pitchfork from Electro Harmonix is similar to the Mooer Tender Octaver in that it keeps things relatively simple. While it’s not as straightforward as the Octaver, the Pitchfork is much less complex than the DigiTech--and that’s a good thing for the most part.


The Pitchfork is known for being a fantastic octave pedal that handles tracking with great ease. It can move in several octaves (three in each direction), which makes it more versatile than the Mooer octaver, and you can also control pitch in five ways (instead of two). Like the Mooer, it’s also extremely durable, though it is a bit larger.

Which one is right for you? Ultimately, it comes down to sound and what you want in an octave pedal. There are a lot of professionals who want the simple workhorse that is the Mooer octaver, but there are other players who like to experiment with the sound a bit more, and in that case, the Pitchfork is more usable.

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Mooer Tender Octaver vs. EarthQuaker Devices Tentacle Analog Octave Up Effects Pedal

We’ve compared the Micro to two more complicated pedals; now, let’s compare to another single-purpose analog pedal. The Tentacle from EarthQuaker Devices is similar to the Mooer in that it’s extraordinarily simple, but it’s even more stripped down than the Mooer--all you have by way of controls is a footswitch.

It’s more than the Mooer, and you can look at its extreme simplicity as a good thing or a bad thing--if you’re used to some control you might be frustrated, but the sound on the Tentacle is so good that you might decide you love not having to mess with dials and settings.

It’s known for its fuzz, so if that’s what you’re looking for in a pedal, it might be a better choice for you than the Mooer--though since both pedals are in the same price range, we’re tempted to recommend you just get one of each!

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What Do We Think?

Frankly, pedals are subjective, and there’s no way we can tell you what to get or what not to get. You have to explore and try things out for yourself. Is the Mooer Tender Octaver worth explorer? We believe it is.

The Mooer strikes a beautiful balance between great sound and simplicity, enabling you to focus on playing without sacrificing great effects. It’s also extremely practical, durable, and will continue to wear well even as it grows older. Plus, it’s relatively inexpensive and can hold its own even when compared to more complex, more expensive pedals.

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The Bottom Line

The Mooer Tender Octaver deserves a place on your pedal board if only to try out. You’ll be impressed by its abilities even as you remain distracted thanks to its simplicity.

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