<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Reaper Channel Control</title>
</head>
<body>
    <input type="range" min="0" max="100" value="50" id="volumeSlider">
    <button onclick="sendVolume()">Set Volume</button>

    <script>
        function sendVolume() {
            var volume = document.getElementById("volumeSlider").value;
            var osc = new OSC();
            osc.open({host: 'reaper_ip_address', port: 9000}); // Change to Reaper's OSC address
            osc.send(new OSC.Message('/channel/volume', volume)); // Adjust OSC message according to Reaper's OSC API
        }
    </script>
</body>
</html>