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CNC machines ? Chromatic mode should definitely be useful. The visual feedback requires an accurate reference frequency. You may play with A4 value or ratios to get desired non musical frequency value.

To wrap up, Thanks, HN community. Your feedback, comments, suggestions, and technical discussions have been truly humbling. We're delighted to offer a complimentary premium version of the app to anyone who contributed to this thread, once it's released. Just email us when it's available.

Post your detailed feedback when you have time or e-mail us. Will be checking the thread. If there is even a slight variation of pitch w.r.t reference note the visual feedback will rotate. But, the feedback would give an idea about the deviation.

Interesting. It took time for us to get the waveform stability working. We also have a smoothed wave overlay on top of raw signal. This is more a filtered version of input signal. Tried adding more filtering to get the sine wave output. But, it was too much CPU intensive. We also tried adding few overlays to this stable waveform. They did not work well and hence removed them. I agree, there is no good way to make the speed independent of input frequency. The plucked note pitch variation in flat bridge instruments like South Indian Veena is too wide when compared to pointed bridge instruments. We are planning to add additional cue that shows if a note is in tune based on pitch variation midpoint. This might help tuning the string or setting the frets relatively accurate.

No. When sharp even by 0.5Hz the waveform rotates right and left when flat.

> me immediate feedback on my pitch accuracy while I play

The visual feedback needs manual reference note settings. That is the only limitation.

The visual feedback uses time period (of ref note) and number of cycles to set the scale of waveform display. It doesn't depend on detected pitch.

I think strobe tuner's used neat analog electronics based reference and filters to visualise.

Thanks for your valuable feedback. Instrument list and temperament profiles would be expanded before adding other new features. The project started as a tuner app for South Indian Veena & as a fretting aid (based on ratios).

On base notes, have you tried using Just Intonation and other tuning profiles. They use perfect 5th. I will take a look at C# and Db difference in other temperaments. Maybe, our nomenclature needs a re-look.

Wow, impressive stability. In case of violin (bowed instrument), the waveform stability is visualised very well. Closer to sine wave. I tend to see less harmonics than plucked lutes like South Indian Veena. Please select 2 or 4 waveform periods in settings, set the desired reference note and try.

An iOS version is definitely in our plans. We intend to launch it once this app has gained sufficient traction.

Yes. The pitch displayed and needle interface is based on measured frequency. It also shows the nearest note name based on this measured value. The visual waveform interface's stability is based on reference frequency set. There is still scope for improvements to detect the pitch variation of plucked strings and provide an analysis. The tuner supports Just intonation which are based on ratios. Here fundamental, fifth and octave have perfect ratios (1, 3/2, and 2) and they can be visualized. Kindly try if you have an Android mobile. There is also a play button to sound the reference note.

We will be introducing an ad-free premium version once we finalize the implementation details. We also wish to clarify that English is not our native language.