How to set the volume of beep sound and save it as wav?

Question

Takara Sumoto 2019-9-17

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/480722-how-to-set-the-volume-of-beep-sound-and-save-it-as-wav

评论： Takara Sumoto 2019-9-17

I want to make a beep sound which volume is adjustable and save it as a wavefile.

If I use this code below, I can adjust volume but I don't know how to save as wav.

%Beep
    Beeper(400, [0.3], [0.5]); 
（↑function Beeper(frequency, [fVolume], [durationSec]);）

Then if I use this code below, I don't know how to set the volume and save.

% generate a beep
    beepWaveform = MakeBeep(1000,.300,44100); 

Thank you for your help.

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Answer 1

Walter Roberson 2019-9-17

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https://ww2.mathworks.cn/matlabcentral/answers/480722-how-to-set-the-volume-of-beep-sound-and-save-it-as-wav#answer_392196

You forgot to mention that you are using Psychtoolbox 3.

audiowrite('NameOfWavFile.wav', beepWaveform, 44100);

However, it is not possible to save a volume inside of a sound file. The sound playing routines have no interface to system volume settings, and have no interface to volume adjustment of any pre-amp and/or amplifier that the speakers are connected to.