rceChooseFileButton').disabled = false;
            });

            document.getElementById('inputSourceChooseFileButton').addEventListener("click", function() {
                document.getElementById('inputSourceFileLabel').innerHTML = 'Select audio file';
                audioFile = undefined;
                filePicker.click();
            });

            filePicker.addEventListener("change", function () {
                audioFile = filePicker.files[0];
                document.getElementById('inputS