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Comment by 7bit | Hacker News Reader

You can't tune an instrument to 1/4 of a hz. Temperature, humidity, mechanic impacts all constantly keep working on the instrument, changing it's tune. Instruments are not high precision tools.

Whatever features this app has, they're just visual fancy with no value.

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If the weather is stable, my violin drifts less than 1/4 of a Hz over the course of a week, let alone a single playing session.

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.

Thanks. I've been looking for a new app to give me immediate feedback on my pitch accuracy while I play, because the violin has no frets and my ear isn't good enough yet to identify whether I'm a little sharp or flat on each note. I think realtime feedback could really help me train my fingers.

I'll post more detailed feedback in a day or two when I've had time to experiment. Hopefully you'll still be checking the thread.

There are also tuning apps that draw the cent deviation as a line, I think the T1 tuner is one such app, you can see a line graph moving and vibrating as you play your note. A similar app to veena is the airyware tuner that shows the soundwave graph moving left or right.

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.

> me immediate feedback on my pitch accuracy while I play

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

Some of us use chromatic tuners to fast (lazy) check our CNC speeds and feeds. 1/4Hz matters to me, go Korg!

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.

> You can't tune an instrument to 1/4 of a hz

I mean you can, but for stringed instruments keeping it to an absolute is hard. its the relative that you care about, at least for an instrument with a static fret. pretty much everything other non-keyboard instrument is down to you to adjust on the fly.

when you are within 1hz you get a beat at roughly 1hz, which is normally fairly easy to pickup.

Its part of the reason why brass instruments are never "wide" in stereo on recordings, because they tend to phase like a mother fucker. (there are ways around it)

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