Guitar tuner app (Price reduced for limited time !!!!)
'Tuning Window" - this is the first window at the top. You can select from 20 different tuning methods.
Warning - Some tuning methods require special strings for the first string, e,g, to get 369 Hz instead
of standard 329.4 Hz standard. You can see a list of the expected tuning frequencies for each string.
This will give you an idea of where you need to be if a string is way off tune, like when putting in a new string.
"Note Window" - the second window shows the note detected and how many cents it is off from expected note(s) in cents.
The string you are tuning will appear in the "Note Window" if it is within 85 cents(~~ 4- 8 Hz) of the expected string frequency.
1 cent= 1200xlog2(detected frequency/expected string frequency).
"Detect Window" - the third window shows the frequency detected.
If there is no string sound, it may will still detect some random frequencies.
The string number is also shown when there is a good match with expected note.
The string number will also linger longer for a positive detection.
"Spectrum Window" - this is the bottom window. It is not a typical spectrum analyzer, but a harmonic analyzer.
Its bottom value is zero and the maximum value is the detection threshold. Typically, the middle frequency is the detected frequency
Tips for best results.
a) Try to keep the room as quiet as possible. For e.g. turn off fan..
b) The mic of the iPhone is at the bottom left and on the iPad it is at the top. Point mic towards your speaker/guitar strings.
The left most bar in the "Spectrum Window" should be ideally zero or maxed out for best result.
You may also try adjusting the detection threshold in some cases. 50 is the default detection threshold.
c) Quiet all strings before you pick the string you want to tune.
d) Ensure amplifier hum is very low. If there is hum, pick the 6th string harder. The frequency of hum and the string are close.
e) Depending on frequency resolution setting, the response time will vary. At 32x (~0.25 Hz resolution),
you will have to wait ~5 seconds before the screen is updated. Some commercial tuners, I tested, use 2 Hz resolution.
So you may chose a lower setting if you need multiple screen updates a second.
f) If your string is way off tune, use the detected frequency reading to know where you are and whether you need to tighten or loosen the string.
g) You will become an expert at using the app with practice.
You will learn to mentally sync the "Note Window" , " Detect Window" and "Spectrum Window".