在Linux Matlab中利用聲卡采集聲音，需要用到audiorecorder函數（在windows中是wavrecord），
r = audiorecorder(44100, 16, 1); %采樣率，采樣位數，單聲道
record(r); % speak into microphone...調用record方法的時候開始錄音
pause(r);
p = play(r); % listen
resume(r); % speak again
stop(r);
p = play(r); % listen to complete recording
mySpeech = getaudiodata(r, 'int16'); % get data as int16 array
