After you import or record audio, MATLAB supports several ways to listen to the data: For simple playback using a single function call, use sound or soundsc . For example, load a sample MAT-file that contains signal and sample rate data, and listen to the audio: load chirp.

Description. [ y , Fs ] = audioread( filename ) reads data from the file named filename , and returns sampled data, y , and a sample rate for that data, Fs . [ y , Fs ] = audioread( filename , samples ) reads the selected range of audio samples in the file, where samples is a vector of the form [start,finish] .

sound(y) sends audio signal y to the speaker at the default sample rate of 8192 hertz. soundsc(y) scales the values of audio signal y to fit in the range from –1.0 to 1.0, and then sends the data to the speaker at the default sample rate of 8192 hertz.

Fs. This parameter is the free-air resonant frequency of a speaker. Simply stated, it is the point at which the weight of the moving parts of the speaker becomes balanced with the force of the speaker suspension when in motion.

How is Sound Produced? Sound is produced when an object vibrates, creating a pressure wave. This pressure wave causes particles in the surrounding medium (air, water, or solid) to have vibrational motion. As the particles vibrate, they move nearby particles, transmitting the sound further through the medium.

Generate Chirp Signal

1. Define the Chirp Signal Generator. Set the initial frequency of the chirp to be 0 Hz and the target frequency (frequency at the end of the sweep) to be 10 Hz.
2. Generate the Chirp Signal. Generate the chirp using the step function.
3. Plot the Chirp Signal. Use plot to plot the chirp signal.

Audio-assisted reading is an individual or group reading activity where students read along in their books as they hear a fluent reader read the book on an audio recording (audiotape, audio book, or iPod).

How to save recorded audio on computer

1. Hello.
2. >> Fs = 1E+4;
3. >> nBits = 24;
4. >> nChannels = 1;
5. >> sig = audiorecorder(Fs, nBits, nChannels);
6. >> recordblocking(sig,5);
7. >> sigsound = getaudiodata(sig);
8. >> t = linspace(0, size(sigsound,1), size(sigsound,1))/Fs;

output = echo_gen(input, fs, delay, gain); Where input is a column vector, fs is sampling rate, delay is delay and gain is the gain of the echo, which is less than 1.

RMS is (to engineers anyway) a meaningful way of calculating the average of values over a period of time. With audio, the signal value (amplitude) is squared, averaged over a period of time, then the square root of the result is calculated.

‘FS’ stands for ‘Full Scale’ and 0 dBFS is the highest signal level achievable in a digital audio WAV file. Higher levels are possible inside digital audio workstation software, but in the files that are recorded on disk, 0 dBFS is the highest level.

Sound Files in MATLAB. In MATLAB, the discrete sound signal is represented by a vector and the frequency is measured in Hertz. MATLAB has several MAT-files that store for various sounds the signal vector in a variable y and the frequency in a variable Fs. These MAT-files include chirp, gong, laughter, splat, train, and handel.

When you do this, Chrome™ automatically asks you for permission to access your microphone every time you open the MATLAB Online site and run soundsc, regardless of your browser settings. The sound function supports sound devices on all Windows ® and most UNIX ® platforms. Most sound cards support sample rates between 5 and 48 kilohertz.

As we talked about in class, these formats all store a sampled signal, so the song is really just a long list of numbers, i.e. values of the signal at each sample time. In MATLAB, mono sounds can be represented as a really long vector, and stereo sounds as two really long vectors put together.

Valid values depend on both the sample rates permitted by MATLAB ® and the specific audio hardware on your system. MATLAB has a hard restriction of 1000 Hz <= Fs <= 384000 Hz, although further hardware-dependent restrictions apply. Bit depth of the sample values, specified as an integer. Valid values depend on the audio hardware installed.