Question: Record an audio using any device (cell phone, microphone, podcast etc) and save as a .wav file. It could be simple talking or singing by you or some other person (I dont need the identity of the person). Make sure that there is variation in loudness. Then use Matlab programming to do some processing. Submit the codes along with any graphs, results and audio files.

(Just Need the Matlab codes) Thank you

1. Find the information about the audio file. a. Sampling frequency b. Time duration c. Number of channels d. Bits per sample e. Size of the file f. Compression status g. maximum value h. minimum value i. length of the audio data

2. Draw the graph of a small segment of the audio (say 0.1 sec). Mention the time of start and time of end.

3. Create a new audio by reducing the sampling frequency to 70%. Explain the result in the audio output.

4. Create a new audio with linear amplification of 400%. Explain the result in the audio output.

5. Using the mean value as the threshold, do the following processing. Explain the result in the audio output in each case.

a. Downward compression by 60% b. Upward compression by 200% c. Normalization