apd lab2 assig2

function modifyVocalVolume(inputFilePath, dBValue, outputFilePath)
    [inputSignal, sampleRate] = audioread(inputFilePath);
    leftChannel = inputSignal(:, 1);
    rightChannel = inputSignal(:, 2);
    scalingFactor = 10^(dBValue/20);
    modifiedLeftChannel = leftChannel * scalingFactor;
    modifiedRightChannel = rightChannel * scalingFactor;
    outputSignal = [modifiedLeftChannel, modifiedRightChannel];
    audiowrite(outputFilePath, outputSignal, sampleRate);
    t = (0:length(inputSignal)-1) / sampleRate;

    figure;

    subplot(2, 1, 1);
    plot(t, leftChannel, 'b', t, rightChannel, 'r');
    title('Input Vocals');
    xlabel('Time (s)');
    ylabel('Amplitude');
    legend('Left Channel', 'Right Channel');

    subplot(2, 1, 2);
    plot(t, modifiedLeftChannel, 'b', t, modifiedRightChannel, 'r');
    title('Output Vocals');
    xlabel('Time (s)');
    ylabel('Amplitude');
    legend('Left Channel', 'Right Channel');
end