Korg - GA-CS Pitchblack Custom Pocket Tuner with 3D Display - Black

This is a great tuner to use, very readable from a distance. The tuner supports a range of different tunings, although I only use A440. There are three tunin modes - standard, semi-strobe and strobe. The standard tuning mode is quick and accurate for day-to-day use and strobe mode is very useful for guitar setup, setting intonation etc very accurately. The lock-on for the chromatic tuning seems reliable and it doesn't jump around like some cheaper tuners that can be inconsistent measuring the pitch of a note, especially lower notes on the Bass. Accuracy is stated to be 0.2 cents, which almost as good as the stupidly expensive peterson strobe tuners.My only slight niggles are that there isn't an external power option and a full bypass so that the tuner can be left in-circuit. It isnt a problem with my Eden bass amp as it has a seperate tuner output, but may one to bear in mind.Overall it is quite good value, and a great product. It does the same thing as cheaper tuners, but is accurate, is easy to use and the display has great visbility, unlike the cheaper LCD display Korg tuners

My favourite feature is the strobe setting which is also good for intonation adjustment because of it's precision. It is possibly more suited to setting up a guitar, home use, travel, practice, and general convenience rather than use on stage in a live setting where a pedal type tuner would be more suitable because you have to activate it by hand and it's plastic. Although the case is plastic, it's still nicely made and doesn't feel "cheap".

I've had a Korg WT-10 electronic tuner for 40 years and it's been very good, but I finally decided to change to a GA Custom. I really like the GA; the display is great to look at but more importantly it's very clear and easy to use. In Regular mode, it's extremely quick to tune my guitars. The manual isn't clear, but I think the Regular mode is accurate to +/- 1 cent. The Strobe mode is much more accurate at +/- 0.1 cent, for times when that is needed, for example when recording or setting intonation. I don't use the third mode, half-strobe, much, as the Regular and Strobe modes give me all that I want (the manual doesn't explain why you might want to use the half-strobe mode, other than as a visual variation).This style of tuner is also available as a pedal (Pitchblack Custom), clip-on (Sledgehammer Pro) and rack (Pitchblack Pro), although the rack version is only accurate to +/- 1 cent.Overall, I'm extremely happy with this tuner and would recommend it. The only caveat is that it's made of plastic and it doesn't feel too robust, so it's probably not something for stage use, where the pedal or rack would be much better.

I have just tuned an acoustic and an electric guitars. Tuning both was very very easy. Setting the intonation on my electric was so positive I went from open to fretted so quickly I was done in half the normal time. How long it lasts is the same with anything I buy, which is the same for everyone. If it stops working I will see how good the guarantee is, if it’s still covered. I’m easy on my purchases, my LP IS 15 yrs old my Sheraton is 20 yrs old both like new. I don’t think top companies get their good name by making bad products. I think people are just sloppy with how they handle things. This Korg GA-CS custom tuner is a great bit of kit, well worth the money. If it goes wrong would I get another, definitely.

Fantastic tuner. Best one I had yetUpdate: I have had it since January 2024… it’s great. It’s so easy to use. I play bass most tuners I have had struggle with the E string . This tunes it ease. No buttons to press when you hand it to the guitar player either. We get a fast tune up and sound in tune together. I know it’s expensive but it really does work and is practical to use. It has had a lot of use still looks great and its battery consumption is fantastic.

Had this unit a while now. The display is great to look at. However as a tuner it’s not that great. It’s is slow and unresponsive, and generally frustrating to use. In conclusion, expensive for what it is. Pretty to look at. Hopeless as a tuner!I use a £1.99 joyo from flea bay more that I use the Korg.

Display, with a real feeling of depth, unnecessary but cool!Easy to interpret and very responsive making it easy to get a reading for instruments with limited sustain, some Ukes and banjos etc.Compact, pocketable and accurate, (checked against a Peterson Stroboplus HD).Input and output jacks. Takes two easy to find AAA batteries.The following could have been better:AA batteries instead of AAA larger last longer even easier to find. Very minor niggle.Annoying to have to stand it up with a plastic plectrum. At this price surely a wire or even plastic flip out stand could have been provided.Interface:Calibration display 0 - 9 ( 0 = 440hz ... 5 = 445hz then 6 = 436hz ... 9 = 439hz ) seriously in this day and age you couldn't display A = 440hz ?Display modes are again labeled 1,2,3 for Regular, Strobe and Half-Strobe, not exactly intuitive.While all the tuners I have come across are flat on the left and sharp on the right indicators would have been nice.

I own this version and the foot pedal version. I feel that this one is quicker to respond and more accurate than the pedal. However, this one feels a bit flimsy and could easily be damaged in a stage environment, whereas the foot pedal has a much sturdier construction. It's ideal for home studio or casual use though. The foot pedal costs twice the price though.