Category Archives: Tuner

Chromatic Tuner

Task Killers BAD!

I have recently started getting some complaints that the settings menu isn’t working properly. Turns out that some people are running extremely aggressive task killers, and these task killers are killing individual activities of DaTuner as it switches between these activities. 

Until I release a fix, if you have this problem, please disable your overly aggressive task killers.  They do not help battery life anyway…

DaTuner reviewed on AndroidPIT

AndroidPit has given DaTuner a positive review!

Bottom line:
I can recommend Tuner – DaTuner to all musicians, particularly to guitarists. The results are surprisingly accurate and the app is a chromatic tuning device, meaning it can help tune unusual tones, too.
This review is of the lite version, which I’m totally happy with. I will be buying the paid version very soon.

Read the rest by clicking on the silver robot trophy below.

AndroidPIT Android Market

Awesomeness! Thanks, guys!

DaTuner Pro Reviewed on AndroidCentral

Android Central has reviewed DaTuner Pro!  They refer to it as a strobe tuner, which is semi-accurate as it has an emulated strobe tuner in it, but really, it is mostly a chromatic tuner with an additional strobe functionality.

I’m not complaining – it was a great review.  Here is a quote:

For the Android-loving musician, I think DaTuner Pro is easily the best tuner you can have on your device. I used to give that title to gStrings, but DaTuner has proven to be so powerful, easy to use, and accurate, it’d be foolish to not use it.

You can read the rest of the review here

Music and Audio – Paid Apps Page 1!

Not sure if it is due to a glitch in the matrix, but DaTuner Pro has made it to page 1 of the Music and Audio paid apps in Android Market.  Let’s just see if this lasts…  (fingers crossed!)

Edit: It was a glitch.  Now that they’ve given Android Market a facelift, DaTuner Pro is now relegated to the last page of Music & Audio.  At least I’m over 100% active install base, thanks to GulliBZ.  Is that a bad thing?  At least I have this screenshot:

DaTuner on the market, page 1


Transposition via Reference Frequency on a Chromatic Tuner

UPDATE: The beta version of DaTuner (DaTunerBeta) on the market has a transposition option as of 14/08/2011.  This will be released soon in the pro version.

I have had requests to enable transposition in DaTuner, but it has really been there the whole time except not really obvious or easy to use. The thing is, the reference frequency in DaTuner has a range of 220Hz (A3) all the way up to 880Hz (A5). The reference frequency is not only useful for orchestra tuning, but also for transposition. I have corresponded with a user of DaTuner about this and they didn’t agree, so here is my logic.

1.) Transposition, by definition, is the shifting up or down of the scale without changing the mathematical relationship between notes.
2.) Example: a transposition of +1 semitone would mean that A would become A#, A# would become B, and so on.
3.) Mathematically, the frequency relationship between semitones is exponential. Each semitone’s frequency can be expressed as (2^(1/12) * previous frequency.)
4.) Moving the reference frequency changes at which frequency A4 starts. The relationship between A4 to A#4, B, etc, does not change. Therefore, transposition can be accomplished by simply moving the reference frequency up or down by x semitones. I know that it is not easy to do this in your head, and soon DaTuner will have support for transposition, but this is a stop-gap poor-mans solution.

Here is a table of the reference frequencies to use to accomplish a transposition of a certain number of semitones in DaTuner, or any other chromatic tuner with a wide reference frequency range.

Semitones (up) Reference Freq(Hz) Note at 440Hz
-12 880 A
-11 830.61 A#/Bb
-10 783.99 B
-9 739.99 C
-8 698.46 C#/Db
-7 659.26 D
-6 622.25 D#/Eb
-5 587.33 E
-4 554.37 F
-3 523.25 F#/Gb
-2 493.88 G
-1 466.16 G#/Ab
0 440 A
1 415.3 A#/Bb
2 392 B
3 369.99 C
4 349.23 C#/Db
5 329.63 D
6 311.13 D#/Eb
7 293.66 E
8 277.18 F
9 261.63 F#/Gb
10 246.94 G
11 233.08 G#/Ab
12 220 A

One Star

5 star ratings are fleeting. They turn to 1 star as soon as a release is made with a bug in it.

1 star ratings are permanent. They seem to never turn back into 5 stars when the bug is fixed.

Why is that?