DaTuner (The Tuner for Android) Help and Overview


Please note that DaTuner has been sold to Prometheus Interactive, so contact them for any support requests.  You can also try https://strobopro.se for similar functionality as DaTuner, written from scratch as a web app to support as many platforms as possible.

54 thoughts on “DaTuner (The Tuner for Android) Help and Overview

  1. Elvis

    hi i’m interested in buying the DaTuner Donate Version but I can not buy by the android market there is a possibility that I will make them uan bank transfer and send me the link to my email

  2. Ayodio

    Thanks for this magnificent app. By far the best guitar tuner I’ve found on Android.

    I just have one suggestion, it would be cool to have big display about whether you need to tune up or down, because when you’re close to the perfect tuning it is sometimes difficult to tell, if you have to tune up or down.

    Anyway congratulation.

    1. Chris Post author

      I like it! I have a strobe display in the donate version, and you can set sharp and flat to be different colours in the free version, but perhaps I could also add a big that is always visible?

  3. Scott Bouloutian

    I love this app! I really want to make an app similar to this. Do you have any links or advice for me on how to get the frequency reading from the android microphone?

      1. Scott Bouloutian

        Hi! I’m really sorry to bother you again. I’ve been doing alot of research on FFT and it seems like I have one piece left in the puzzle. Do you know how do you get the frequency from the magnitude of the output of the FFT?

        1. Chris Post author

          Hi Scott,

          I thought that I had replied to this, but apparently not!

          Magnitude of the FFT only tells you how strong the signal is at a specific index.

          It is the FFT index with the largest magnitude that tells you what the most probable frequency is.

          So, let’s say you do an FFT with a size of 512. You find that the maximum FFT magnitude out is at, let’s say, 33. (you only use the first 256 peaks in this case, the remaining peaks will have the same magnitude as the first 256 peaks, only mirrored.)

          So how do you go from that to frequency?

          index / (FFT size) * sample rate.

          In this case, if you were using the microphone at 44.1kHz:

          33 / 512 * 44100 = 2842.4Hz.


  4. Scott Bouloutian

    Thank you so much! I got the correct frequency readings when playing a few notes around middle C, but then everywhere else gives strange results. I’ll keep tinkering around with it. I read somewhere about a window function so I’ll give that a try. Thanks so much for your help!

  5. Karen

    I was able too figure this out and tune my guitar before I even found the
    Help instructions. They are written very clearly as well. I’m just
    Learning to play guitar so I’ll be using this a lot. I like the color changing and other indicators that get you tuned to the note. I have free version on Samsung Galaxy Smart. Thanks!

  6. Medmuse

    Chris, do you have other temperaments available, such as modified mean tone (Young’s, for example)? I need them for my historical harps, where mean or just temperaments aren’t appropriate. I’m no programmer, so I need one readymade. Thanks and keep up the good work!

    1. Chris Post author

      Alternate temperaments are available in the paid version. Currently they are hardcoded but I am working on making them customizable, at least via a text editor. The good news is that Young temperament is included, so you won’t need the customization feature. Cheers, Chris

  7. Ro

    I’m having a problem. I’m sorry, I’m very new at this. But everytime I try to tune the low E string, the display says B#. I don’t know what can I do to “fix” this, either from the app or from my guitar.

    Thank you.

    1. Chris Post author


      Try to get the guitar closer to the phone, and turn off noise reduction if it is on. If that doesn’t work, would you be able to use any android audio recorder and record your low e string so I can see how your microphone response is?

      Also, what kind of phone are you using?

      1. Ro

        Thanks for such a quick reply. I’ll surely try to get the guitar closer to the phone and the noise reduction thing.

        My phone is a Motorola Cliq (or Dext, depending on where you are)

        Okay, I’ll try your suggestions and if they don’t work, I’ll try recording my low E string. Thank you!!!

  8. Tony M

    First, thanks for an awesome app, running beautifully on my Moto Triumph! It seemed like I was “discovering” new features every time I used it (until I finally read the *whole* help file…. 🙂 )

    Coupla things:
    1) This may or may not pertain to Ayodio’s comment above; it occurred to me that perhaps an option for the “error bar” could switch into a “magnify” mode when the pitch lands within, say, 10 cents for a certain period, making the full width represent 20 cents f’r’instance. This could perhaps be differentiated by having the vertical tuning line blinking, extended or highlighted somehow, so that if you’re not really paying attention to the markings, you’d at least be notified.

    2) Your recent post with the FFT of the absence of 82.4 Hz made me realize just how impressive it is that this app tunes the low B on my bass (30.87Hz)!

    3) I have one possible issue, but after reading all the comments and tips, I’m going to try a few things before I ask about it.

    Thanks again, Chris. I’m actually considering purchasing a second time, just because….

  9. kptrpt

    I had da tuner pro installed on my HTC Thunderbolt. I had to get a replacement and lost the app. I’ve downloaded the lite version, but I would love to have the pro back. I don’t remember whether I downloaded it from the App Market or the Amazon app store, but I don’t have it under my apps in either. Can you help?


  10. Chris Post author

    Hi, I am not sure about what I can do to help. If it was purchased from google it should show up under your my apps tab in the Android Market. I don’t actually know about Amazon but I assume they have the same thing. For google, just search for DaTuner and then click on DaTuner Pro. It should say ‘purchased’ beside it. If not, try Amazon.

    If it helps, I can look for your purchase under my market account.unfortunately,i am unsure of how to do that under Amazon.

    Best, Chris

    1. kptrpt

      Hi Chris
      Thanks for the quick reply. For some reason it doesn’t show up as a purchased app under either market. I’ll just have to bite the bullet and put out another whopping $2.29 – lol
      Good luck with the app – it’s great (a metronome included would be cool too 😉


  11. Frank Deruyck

    Can someone please tell me what TEMPERAMENT I should use to tune an old GRAND PIANO (Pleyel Grand Piano building year 1907). I tuned it with the “EQUAL” temperament and it sounds horrible (sharp an noisy). I use the DONATE version and can install many different TEMPERAMENTS, just don’t know which to choose!!
    Thanks a lot
    Frank (Belgium)

  12. mtheo

    Hi Chris,
    I congratulate you on the development of DaTuner. It’s a clever and very usable application. It’s quite hard to find an alternative.

    I would have a question, maybe obvious, but not for a newbie like me. Besides the built-in microphone, should it be possible to get the input signal also from an external source connected directly to the input jack of my smartphone? In this way, I could tune my electric bass guitar in the rehearsal room without keeping quiet the rest of the band 🙂

    Thanks again for your great work.


    1. Chris Post author


      I have tried on one phone with a headset microphone and it worked, but I think I need to do some more work on this since I’ve had at least one report that it didn’t work.

  13. Brian

    Hi Chris

    I have been tuning pianos professionally for over 30 years and finally I’ve found a compact, accurate and affordable device – Da Tuner, to make my work so much easier. At present I am using the app mainly to tune just the F3-F4 temperament and have achieved spot on results. Occasionally I have to tweak in just a smidgen of a cent here and there to get the intervals beating consistently, but that’s probably due to the different scaling between piano models. Pianos are a very different beast compared to other instruments, demanding a very systematic approach when tuning. Shortly I intend to do a few test tunings from top to bottom, but envisage the result to be darned near perfect.

    I am so impressed with your Da Tuner, I have printed out an information sheet for my piano customers, assuring them that they will now be getting the very best from their piano!

    There are a few things I’d like to discuss with you that others might find boring on this forum, so you might like to contact me on my website.

    Congratulations on your excellent product.



  14. aasten

    Hi there! Dear author! First, thank you for this app! It is very suitable for me. I use this free version both when tuning guitar as well as when singing — to verify my voice. So, I have a proposal about improving the GUI. It will be more convenient in this way to add the displaying of the note in the stave (simply as dot or ‘x’ or smth else) with selected by user clef (bass,treble,etc) and key of diatonic scale (Cmaj,Dmin,etc). Simply by choosing between representation of the note — either standard (A4, B3,etc) or drawn on stave. As for me — I am ready to pay for this feature :).
    P.S. English is not my native language, sorry if grammar is incorrect.
    P.P.S. I also may try to write it myself (maybe too slow 🙂 ).

  15. DJMC

    Hi Chris,
    Just downloaded this app to tune my E flat Alto Saxophone. The notes are different, presumably as this is default set to piano? But I note you say “It is designed to be very easy to use and to tune your instrument (guitar, ukelele, violin, bass, cello, mandolin, piano, harp, saxophone……..)”. I also note you say “DaTuner wasn’t written to support custom instruments”. Which is it please? In other words, is there a way I CAN alter the settings so that a A on my sax equates to an A on the tuner?
    Many thanks for any help (and easy to follow instructions please!). David

    1. Chris Post author


      Thanks for the question!

      When I stated that DaTuner wasn’t written to support custom instruments, I meant that it doesn’t support custom note lists, like the 6 strings of a guitar. I am working on that but my time outside of work is quite short.

      However, there is a setting for transposition, which is what you are looking for. Just transpose E-A, and you’re done!

      Cheers, Chris

  16. Eduard


    This tuner is absolutely the best, Big thanks for it!
    I learning to play Indian classical music on Sarod and found that it will be great to add Indian classical music Sargam notation. This Sargam main notes are: SaReGaMaPaDhaNiSa or DoReMiFaSolLaTiDo in west music. Minor notes calls Komal (or “k”), major calls Tivra (or “t”).
    For example Raga Malkauns (http://en.wikipedia.org/wiki/Malkaush) have this notes:
    Sa, Ga(k), Ma, Dha(k), Ni(k), Sa
    Do, Mi(minor), Fa, La(minor), Ti(minor), Do in western notation

    I will be happy if you can implement it 🙂

  17. bob_piper

    Hi Chris,

    I like DaTuner (Lite) and plan on donating for the full edition. I was wondering if, in the custom temperaments, there is a Highland Bagpipe scale? We tune with the F# 15 cents flat and both the low and high G at 30 cents flat.

    Is writing a custom temperament something that can be done via a text editor?


  18. AlfChamings

    DaTuner Pro does have a bagpipe scale in the alternative temperaments and it works very well. The ability to set the frequency of the tonic is also very useful: it allows you first to measure the frequency of your low A and then to set low A on DaTuner to whatever it is. Most modern chanters will probably be tuned to the scale set in the DaTuner bagpipe setting but older chanters will have a sharper high G and perhaps a sharper D, corresponding to the research done by Seamas MacNeill in the 1950s of the tuning of chanters at that time. I was surprised that my chanter low A is quite high – between 466 and 473 (depending on the reed) even though it is 30 years old. It does have a sharper high G than the DaTuner scale but I put tape over it because I like the modern flatter high G. Get the Pro version – it’s definitely worth it!

  19. ErnstMueller

    Hi all,
    maybe I’m a little bloody – I just bought “DaTuner Pro” and I need tuning temperaments like Valotti, meantone and Werkmeister…
    So, cann anybody tell me how I can get these temperaments on my device?

    Thanks a lot

    1. Chris Post author

      Hi Ernst,

      Sorry for the delay (almost a month!) but there is a spreadsheet that is created when DaTuner Pro is started up that contains all of the temperaments. I believe meantone and Werkmeister are there, but I am not so sure about Valotti. If it isn’t there, you can create it yourself by manually editing the spreadsheet to create it. Also, I am currently on a break from work and will shortly start working on adding new features and fixing bugs in DaTuner again. The new version (in beta) supports temperaments with different settings for each octave as well as custom instruments via an .xml file.

  20. Chridman

    Dear Chris

    Have been using DaTuner Pro for a long time on my android and it’s great.
    Broke my old phone and got new Samsung S5. Downloaded DaTuner but there is no way of accessing settings!
    Read on this site about aggressive task killer problem. Took the task killer away, reinstalled DaTuner but still there is no settings button or bar (or whatever it is, I can’t remember now as I haven’t needed it since setting my preferences a long time ago). There is only the long-press options.

    Please help!

  21. bromberg

    Apologies for a very basic question but please explain what the number next to the note refers to; e.g., when you state E4 in your guitar tuning section, what exactly does the 4 refer to?

    Also, can your app be used to transcribe a solo guitar tune or do the notes sound too quickly to create an accurate transcription in a reasonable way?

    Thanks, and looking forward to upgrading to the pro version after I fully understand the basics.



    1. Chris Post author

      The 4 is for the octave of the note. Stock settings are for tuning, not capturing quick notes. With some tweaks to the settings, namely averaging time, it could probably capture a solo.

      Regards, Chris

  22. tkjtkj

    Great app ! and will be especially appreciated by Pedal Steel Guitar players, who must tune our 10 string instruments in a complicated ‘temperment’ fashion
    using ‘cents’ ..
    What the hell, i’ll give you the ‘cents’ here that we’d need your tuner to manage:

    Name of this standard tuning .. thE most common: E9
    String: Note ‘Cents’ lower (-) or higher (+) :
    1 F# +4

    2 Eb -10

    3 G# -11

    4 E 0

    5 B 0

    6 G# -11

    7 F# -15

    8 E 0

    9 D 0

    10 B 0

    There is another much less used ‘standard’ tuning called: C6
    of which i know nothing about, really.

    If this instrument’s tuning is not as above, it can sound TERRIBLE!

    Hope this can facilitate your developing additional instruments!

  23. tkjtkj

    In my comment above, notice that the 3rd string is the ‘highest’ note , Unlike
    a normal guitar .. This is NOT an error 😉

    Would also be nice if yur ‘comment editor’ here preserved additional spaces
    so that my data above would appear in ‘column’ form …

    oh well, maybe this geezer is too dumb to figure that out …

    but thankyou for this opportunity!

  24. tkjtkj

    Please add these ‘Pedal’ / “KneeLever” abilities too:

    Pedal A : C# -17

    Pedal B: A -7

    Pedal C: F# -22 and C# -17

    KneeLever : Eb -10
    (Many units have 4 or more KneeLevers , and maybe 6+ pedals !! ..)

    And yes, this machine can be a B***H to tune … !!

    Ref: Jeff Newman <= the 'God' of PSG tuning :

  25. Chridman

    Wrote message May 11. Still have not received reply. Very disappointed that developer of Datuner has not fixed bug with samsung s5! Since changing phone i have completely lost the menu! Why can I not get in touch directly with developer. I have paid the fee for Datuner Pro and I think I deserve to get the proper working version!!!!

    1. Chris Post author

      Hi Chridman,

      Sorry it took so long to reply. I didn’t see the message here on WordPress right away. I’m back however, and have a fix for your problem. The beta version of DaTuner Pro is up and has access to the settings menu via a long press on the main screen. The fix is sort of a kluge for now but I hope to implement a more modern interface shortly.

      To get the beta, please go to https://plus.google.com/communities/115093137218069178065 and join the community. Then visit the play store and opt in to the beta version.

      Sorry again!

      Regards, Chris

  26. piper norm

    I purchased the pro version so I could use the bagpipe tuning mode. I looked at the “instuctions” for adding an instrument, but they do not make any sense to me. How do I add the bagpipe tuning mode?

    1. Chris Post author

      It could be that you didn’t click the “ok” button after changing it… Or that the first “note” has not yet been heard. To save battery, the screen is only updated when a new note is detected.

  27. jpf

    Hi, Chris!

    I’m trying DaTuner Lite to tune a pipe organ. I’m having trouble with the higher notes, say from F7 and up: DaTuner’s display gets unstable and the readings are complete nonsense. Changing the position or distance from the mic (cell phone, in fact) to the pipe doesn’t help. This particular organ has pipes up to C8 (8372 Hz). I tried recording the mic and displaying the waveform. It’s a quite pure sine wave. I used 44.1 kHz samplerate. I fed this recording to a freq counter and the display was quite stable even when the mic was many meters away from the sound source, i.e. the pipe. I think it would be nice for DaTuner to cover this upper range. I know of pipe organs going up to C9, though none of the ones I have access go so high.

    I’m also having problem with the lower notes C0…C1. I blame the low fundamental vs. harmonics content of these notes. I guess it would be possible to guess the fundamental from the harmonics, but the reading of DaTuner gets quite unstable to be of any help.

    Otherwise DaTuner works quite well. Thanks for your hard work !

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