Music Note Frequencies Chart

What you see here is a full piano keyboard on your screen. The keys can used with your computer keyboard or clicked with your mouse to explore frequency of notes in real time. When a key is pressed, it produce a different tone that also shows its exact pitch in hertz and the matching midi number. No need for any musical software to be installed on your device; this is a handy means of hearing how pitch vary throughout the range.

From low C at the bottom of the keyboard, it stretch up through several octave to high C. The white keys are called natural notes (C, D, E, etc.) and the black ones is sharps and flats. You can try playing each one by clicking on them. You can also use your computer’s keyboard. Just tap the tab key until the key you want is highlighted then hit space or enter to make piano sound.

How to Use the Virtual Piano

The readout panel are located above the keys. It displays the name of current key chosen, the precise frequency (in hertz) and the MIDI note number too. Because a flat and sharp are the same pitch on a black key, it will also display the flat and sharp name. This way you can match up what you hear to the numerical values associated with that sound in music theory and music production. It is useful if you need to check reference pitches or tune an instrument by number.

A further option for you is the tuning control which change the reference frequency of A4. There are three options here: click on 432 hertz and it will set that as your reference; click on 440 hertz and you have the standard concert pitch and so on. If you’re working with an ensemble using a non-standard reference pitch, or perhaps just comparing two different standards of tuning then this feature come into play. It recalculates the frequency of each note across the keyboard instantly. This enables you to hear what a small alteration in reference pitch do to the whole scale.

The tuning buttons are located next to the volume slider which allow you to turn up (right) or down (left) the master output level of what is being played. If you’re using sensitive headphones or just listening in a quiet environment, this allows you to keep the volume at a comfortabley level as you experiment with different notes. Use it before you play and during your experimenting to ensure there’s consistency in how loud the sound is.

In the image below, you’ll notice that just under the keyboard is a row of pills representing the frequency for each note, such as an ‘A’ in the next octave or octaves above. This makes it easy to refer back to the idea of concert pitch and multiple octaves of it. The frequency of the note double with each new octave. You can visually see the maths at play here, as each subsequent octave has a frequency that is more double the last one. This offers some perspective to understanding why pitch increase much faster, not at a steady rate, over the span of an instrument.

Click the fullscreen button to make interface bigger. In this mode, the keys will be wider and taller. This may help you find your way around especially on small screens. It can also give you a larger target area to hit. To leave fullscreen, simply click the fullscreen button again. That’s a nice feature if you want a clear view of both the upper and lower register without having to scroll.

Below that is what I would call the help panel. It’s a brief rundown of the controls and the math involved with the frequency. You can show/hide it by clicking on the toggle button if you want a reminder. It describes the equal temperament system which assign each note its given hertz value in relation to the A4 reference. This is useful if you’re wondering why certain notes are given those hertz values.

To find notes beyond what’s visible in the viewport, just swipe and scroll left for lower pitches or right for higher ones. The hidden range extend horizontally across the keyboard. As you choose notes within this unseen portion, the readout panel will update immediately. You do not need to reload the page to explore the full range of available octaves.

To gain an understanding of the response time try playing a simple tune on your computer keyboard. You’ll notice that there are larger jumps in the frequency numbers between white and black keys different than between consecutive white notes, where the change is much smoother. Try to keep a note in your head as you change the A4 reference and listen for the slight change in pitch.

The purpose of this tool is for you to play with and explore. Take some time exploring other tuning standards and even higher or lower octaves. Get started clicking now and see how the tones match up with the numbers