TC Electronic POLYTUNE 3 Ultra-Compact Polyphonic Tuner with Multiple Tuning Modes and Built-In BONAFIDE BUFFER

I bought this tuner since I use many different alternate tunings for my guitars, basses and other instruments and while the clip on tuners I have work well, the B string of my 5 string bass does not register.While I cannot speak to durability in the long term, my brother has the same model that has served him well for several years. So far I am satisfied by my purchase. The Tuner works as advertised, the build quality is excellent and I really enjoy it aesthetically.Although I have seen reviews that the Peterson is more accurate, I cannot imagine that the difference is discernible. For the money, the Polytune serves my purposes as a reliable piece of equipment and I am satisfied it was the right choice.

I was looking for a pedal tuner and decided on this one. Glad I did.

I was on the fence about whether to choose this unit or the comparable Boss TU-3 unit. They're both the same price, and both get good reviews. I finally decided to go with this unit because it's a newer design and offered both conventional and "strobe" style tuning. The latter appealed to me because I have been using a Peterson Strobo-Clip tuner for some years, and really like the strobe tuning method. I decided I wanted a stomp-box tuner so that I could mute the sound and do quick tune-ups more conveniently than the clip-on tuner permits.I play electric bass. I found that the conventional tuning mode on this Polytune 3 pedal was just fine for my needs, and I have not yet even tried the strobe version. It also revealed that I need to touch up the intonation on my jazz bass -- playing various notes up and down the fretboard showed some deviation from the correct tuning. All the more reason not to need the micro-precise tuning of the "strobe" style display.When I say "conventional" tuning display, I mean a display that shows a needle that is positioned to the left of center if the tuning is flat, or to the riht of center if the tuning is sharp, and dead center when the tuning is correct. Some tuners have arrowheads on either side of center that light up when you are not quite at the correct tune. With this unit, the needle itself changes color, displaying as red when the note is sharp or flat, and green when it is correct. It is very quick to go through the four strings of my bass and tweak it for the needle to be green.This is a chromatic tuner, meaning it listens for the incoming note and displays what it thinks the note is. That works fine for me. It is only necessary to know that the standard 4-string bass tuning is E A D G. There are handheld (not stompbox) tuners, like the Boss TU-12, that have fixed presets for tuning a guitar or bass, but that is not generally available on a stompbox.The Polytune 3 has a "soft" pushbutton that puts it in and out of tuning mode. By "soft" I mean that there is no mechanical ka-chunk as the sawtich is operated. When the unit is tuning, the output is muted. When tuning is finished (by pressing the switch a second time), the output is connected again.There are three modes available, which are selected by internal DIP switches. The first mode provides "true bypass" switching when the tuner is turned on and off, which means that when it is not tuning, there is a direct connection from the input jack to the output jack. The second mode provides "buffered bypass," which means that the incoming signal passes through a "buffer" amplifier when not tuning. (This can be advantageous in a number of situation, especially if long cables are being used.) In both of these first two modes, the tuning display lights up only when the tuner is active and the output is muted. In other words, you can immediately tell whether you are muted or not by looking to see whteher the tuning display is lit up. The third mode is also buffered, but the tuning display remains active all the time. Thus, in theory, you can watch your tuning as you play. I have only used this unit in the second mode (buffered bypass, display on only when tuning) because that best suits my needs.There are many features which I may never use. For example, while the factory setting is A=440 Hz, it is possible to adjust this reference. Also, the unit is advertised as allowing the user to play all the notes on the instrument at once, whereupon it claims to be able to sort out which of the notes are off. I don't see any particular benefit to this for the bass, and I have read that users do not believe the tuning accuracy is quite as good in this "polyphonic" mode. Frankly, it doesn't take very long to tune 4 strings individually, and that's what I do. Since my bass keeps tune pretty well, it only requires minor tweaking to deal with room temperature change, etc. This takes no more than a minute at most.All in all, I'm very happy with my choice of the Polytune 3. It's very easy to use, has quite a readable display, and makes keeping in tune during a show very simple. I suspect the competitive units out there (like the Boss TU-3 or the Korg Pitchblack) are also fine, which may make the choice more difficult in this category. All I can say is that I think people would be happy with this well-made unit, so hopefully that will help with the decision.

Best tuner pedal I’ve had!

I like this a lot

I think this tuner is pretty good. The display is large and bright, and the accuracy seems to be very good -- especially in strobe mode. I like that it's buffered, which helps keep the signal strong throughout the pedalboard.Some things I don't like about it are:1) You cannot turn the display off in un-muted mode. The only way to use it un-muted is to have the display, which is bright and can be distracting, always on. This is admittedly only a small annoyance to me, as I like to hear the guitar through the amp when I'm tuning at home. I don't want to slavishly rely on the device rather than my ears, but I really don't want that miniature circus of a display bouncing along with every note I play when I'm not tuning.2) There's a pretty big discrepancy between the 6-string display and the single-string display: i.e., it may show all strings as being in tune when strumming them all together, but when you pick each string individually, some may display as sharp or flat. I guess this is acceptable, since the 6-string display is still useful as a quick check, and I'd expect to tune individual strings when I need the best accuracy. And the individual string accuracy seems to be very good.3) Those with a visual astigmatism, blue-green partial color blindness, or just plain blurry old-age, medium-range vision (like mine) may find the red/green vertical indicator a little hard to interpret -- especially if there's need to tune quickly. The needle tends to blur, and it takes me a moment to focus and determine where the needle is (green) and where the deviation (red) is going. They tend to run together. I'm using it in Strobe mode, which helps, but even that, in combination with the needle, is tricky for me to grasp quickly. This was never a problem with my Boss TU model tuners (which I would probably buy over this if I had to do it over again), or my Peterson iPhone app, so I know there are displays that are easier for me to read.