zabbarob

$sheets = Excel::load($filename)->get();
$firstSheet = $sheets->first();
$header = $firstSheet->first();
$data = $firstSheet->slice(1)->map(function ($row) use ($header) {
    return $header->combine($row);
});

zabbarob

// playNote(440, 10) will play a 440 Hz sine wave for 10 seconds
//
// Don't forget that the browser requires some user interaction before
// calling the function, otherwise it will block audio output.
//
// Clicking on the web page once should be enough, though.
//
function playNote(freq, duration = 1) {
  const context = new AudioContext();
  const oscillator = context.createOscillator();