Tech: KORG AT-2 Tuner:Help needed.

Subject: Tech: KORG AT-2 Tuner:Help needed.
From: Murray MacLeod
Date: 21 Mar 08 - 11:37 AM

I recently changed the battery in my Korg AT-2, and somehow have succeeded in changing the settings.

When I switch it on, both diodes flash on and off simultaneously, and when I play a note which I know to be correct at A=440 concert pitch, it indicates that the note is sharp, suggesting that I have inadvertently recalibrated the tuner to a different pitch (which I do know is possible with this model )

Unfortunately, I have long since lost the instructions that came with the tuner, so it would make my day if anybody out there can tell me how to get the thing back onto concert pitch.

Subject: RE: Tech: KORG AT-2 Tuner:Help needed.
From: JohnInKansas
Date: 21 Mar 08 - 11:40 PM

A quick check at Korg's websites doesn't show any place to download instructions (for anything). The picture of the AT-2 (from their archives) shows a rather large button marked "Calibrate" which likely does "something." Pushing the button may let you discern how it works.

A SWAG would be that pressing the calibrate button will light up an LED for one of the "A-frequencies" along the top of the display. Repeated pushes should advance to the next setting. You want the light at 440, of course, the last time you punch the button.

Once the correct "A" is selected, the AT-2 probably senses the "closest tone" and the same LEDs now indicate what scale note you're close to.

But I'm just guessing.

If you're convinced it's "wrong" you're unlikely to make things worse by experimenting.

Several places still advertise the AT-2 for sale, even though it appears to be on Korg's "obsolete" list. If you can find a local seller you might be able to "examine" one and sneak a look at the destruction manual(?).

John

Subject: RE: Tech: KORG AT-2 Tuner:Help needed.
From: GUEST,Serge
Date: 08 Nov 17 - 12:16 AM

Each time you fast double-click on the calibration button, the frequency changes from 438 to 444 (+ #) as desired

Subject: RE: Tech: KORG AT-2 Tuner:Help needed.
From: Nick
Date: 08 Nov 17 - 04:21 AM

Is it possible that Korg might use the same idea on other tuners? This one has a calibration button which it describes in the manual. it suggests that it will be reset by taking out the batteries and it will reset to 440.

Korg Chromatic tuner manual

Subject: RE: Tech: KORG AT-2 Tuner:Help needed.
From: Nick
Date: 08 Nov 17 - 04:22 AM

Whoops. 9 years ago.

Subject: RE: Tech: KORG AT-2 Tuner:Help needed.
From: GUEST
Date: 03 Apr 20 - 09:19 AM

When you take off battery, you can see two vertical gaps. If you remove shell of the tuner, you can see two screws, that probably you can adjust with a screwdriver. I don't know what they are for, but you can try.

Subject: RE: Tech: KORG AT-2 Tuner:Help needed.
From: GUEST,Prairiebassman
Date: 17 Jun 26 - 02:20 PM

I have used this tuner for decades. JohnInKansas guessed correctly.

Subject: RE: Tech: KORG AT-2 Tuner:Help needed.
From: GUEST
Date: 19 Jun 26 - 03:48 AM

After years of struggling with different tuners I have found that the Peterson Strobe app on my phone works best of all for me. I even use it to detect the key of tunes being played by others, to help me join in.

Subject: RE: Tech: KORG AT-2 Tuner:Help needed.
From: John MacKenzie
Date: 19 Jun 26 - 12:02 PM

Sorry that Guest was me, didn't know I had been logged out.

Subject: RE: Tech: KORG AT-2 Tuner:Help needed.
From: Stilly River Sage
Date: 19 Jun 26 - 12:19 PM

It's nice to revisit some of JohnInKansas's always sage advice after all of these years.