Piano Waveform Visualiser
I made a small C++ piano visualiser where selecting keys changes both the sound being synthesised and the waveform shown beside the keyboard.
Independent development. C++17, SDL2 and audio synthesis.
I was playing with the relationship between piano frequencies and the shape of their combined signal, and the on-screen keyboard gave the same set of notes a sound and a visible waveform, with the waveform drawn from the combined signal while each selected key still had its own frequency.
SDL2 handled the interface and audio, with key selection and a scale control changing the display as the tones were combined, and hover information showing the individual key frequencies.
The aggregate frequency values are part of this visualisation's calculations, though a combination of notes still contains its separate components and should not be reduced to one physical pitch.
The catalogue date follows the first preserved commit on 10 July 2025.
Outcome
An interactive keyboard and synthesis experiment with a waveform display. The preserved program supports selected keys and display-scale controls, with MIDI and file input left as future work.