Final answer:
To open an audio file and determine its sampling rate in Matlab, use the 'audioread' function, which stores the audio data in a vector and the sampling rate in a variable.
Step-by-step explanation:
Within Matlab, you can open an audio file and retrieve the data as well as its sampling rate using the audioread function. To save the audio data into a vector x[k] and determine its sampling rate, you would use code similar to the following:
[x, fs] = audioread('king.wav');
The variable x is the vector that stores the audio data, and fs represents the sampling rate of the audio file. It is essential to ensure that the audio file's path is correct and that Matlab has access to the directory where the file is located. If 'king' is the correct filename, you may need to add the appropriate file extension like '.wav' or '.mp3' depending on the format of the audio file. The function audioread returns the audio signal as an array, where each column corresponds to a channel, and the rows represent audio samples.