arduino-playtune | background polyphonic music generator for Aduino

arduino-playtune is a C++ library typically used in Internet of Things (IoT), Arduino applications. arduino-playtune has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

to try out playtune,. i've tested this on a nano, mega 2560, uno, and micro. playtune is a family of music players for arduino-like microcontrollers. they each intepret a bytestream of commands that represent a polyphonic musical score, and play it using different techniques. (1) this original playtune, first released in 2011, uses a separate hardware timer to generate a square wave for each note played simultaneously. the timers run at twice the frequency of the note being played, and the interrupt routine flips the output bit. it can play only as many simultaneous notes as there are timers available. the sound quality? buzzy square waves. (2) the second ("polling") version uses only one hardware timer that interrupts often, by default at 20 khz, or once every 50 microseconds. the interrupt routine determines which, if any, of the currently playing notes need to be toggled. it also implements primitive volume modulation by changing the duty cycle of the square wave. the advantage over the first version is that the number of simultaneous notes is not limited by the number of timers, only by the number of output pins. the sound quality is still "buzzy square waves". (3) the third version also uses only one hardware timer interrupting frequently, but uses the hardware digital-to-analog converter on high-performance microntrollers like the teensy to generate an analog wave that is the sum of stored samples of