![]() You can download recorded music straight into your PC. Practice songs and record your piano playing.Use the keybinding feature to assign buttons on notes. Tap or click the piano keys to practice scales or play any of your favorite tunes.This virtual piano works on browsers for tablets, mobile phones, laptops, and desktop PC.Enjoy piano practice, composing, and recording music with this online piano application. You can even play this interactive online piano on your keyboard thanks to its multi-key binding feature for desktop PCs. It comes with 25 piano keys: 15 white (whole notes) and 15 black keys (sharp or flat notes). From classical, you can switch to contemporary sounds such as electropop and synth. It comes with 40 different sound modes that allows you to play various styles and moods of music. Kids and adults can enjoy learning and playing songs by changing the piano’s sound preferences. The problems can be mitigated by not hardcoding the note frequencies as integers, and by using a higher sample rate.This is an online virtual piano keyboard with a modern design that can record and download any tune into your computer. And if you would add higher octaves to your keyboard, then this error will become more audible. But at 440 Hz, the buffer is only 100 samples long, so now any rounding error in the buffer size will result in a frequency error of up to 20 cents, and this can indeed already be perceived as being out of tune. You also then use the slightly wrong frequency to set the buffer size. However, this is not the only source of error. In the middle octave, the error is small enough (around 2 cents) that most humans cannot hear the difference, but if you would add lower octaves to your keyboard, then this error will become more audible. So your frequencies will be off somewhat from the "right" frequencies. While the middle A is defined to be 440 Hz, the other notes in an equal temperament octave cannot be represented by integers. Toby Speight already commented on the C++ part, I'll focus on the audio generated by your code. It will make playing the piano very difficult for those of us who don't share your (computer) keyboard's layout. Hard-coding the assignment of letters to keys is probably a mistake. Of course, when we change the type of keys, this issue goes away, and we can return to using references.Īt least one member function should not be changing its object, so should be declared const: bool isPressed() const Since the keys are pointers, it's sufficient to write for (auto *key: keys). These loops have an unnecessary level of indirection: for (auto& key : keys) However, I'm not convinced that we even need pointers there: I think std::vector should be fine, or perhaps even a std::array. Smart pointers take care of cleaning up owned resources, so we could use std::unique_ptr instead of PianoKey*. I'm concerned about these owning pointers: std::vector keys īecause we're using raw pointers, we needed to write a destructor for Piano. ![]() The latter may also define the std namespace versions, but is not required to, so a portable C++ program includes. Std::floor and other mathematical functions require inclusion of rather than. Int nsamples = SAMPLE_RATE * (1.0f / freq) įor (int i = 0 i notes Īpp() : window(sf::VideoMode(WIDTH, HEIGHT), "Simple piano") Sf::Int16 squarewave(float t, float freq) Static const float KEY_WIDTH = float(WIDTH) / KEYS įloat map(float n, float x1, float x2, float y1, float y2) What can I improve with this code? #include The application is a virtual piano with only one octave for simplicity. ![]()
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