MATLAB Function Reference

wavrecord

Record sound using a PC-based audio input device.

Syntax

• y = wavrecord(n,Fs)
  y = wavrecord(...,ch)
  y = wavrecord(...,'dtype')
  

Description

y = wavrecord(n,Fs) records n samples of an audio signal, sampled at a rate of Fs Hz (samples per second). The default value for Fs is 11025 Hz.

y = wavrecord(...,ch) uses ch number of input channels from the audio device. ch can be either 1 or 2, for mono or stereo, respectively. The default value for ch is 1.

y = wavrecord(...,'dtype') uses the data type specified by the string 'dtype' to record the sound. The string 'dtype' can be one of the following:

• 'double' (default value), 16 bits/sample
• 'single', 16 bits/sample
• 'int16', 16 bits/sample
• 'uint8', 8 bits/sample

Remarks

Standard sampling rates for PC-based audio hardware are 8000, 11025, 2250, and 44100 samples per second. Stereo signals are returned as two-column matrices. The first column of a stereo audio matrix corresponds to the left input channel, while the second column corresponds to the right input channel.

Examples

Record 5 seconds of 16-bit audio sampled at 11,025 Hz. Play back the recorded sound using wavplay. Speak into your audio device (or produce your audio signal) while the wavrecord command runs.

• Fs = 11025;
  y = wavrecord(5*Fs,Fs,'int16');
  wavplay(y,Fs);
  

See Also

wavplay

wavread

wavwrite