error "Too many output arguments."

Can anyone help me? My code is the kit(AppSoundLevelMeter) and it shows the following error, how can I fix it?

thanks a lot!

Error using audioread

Too many output arguments.

Error in sound_acquisition (line 34)

[signal_ref,Fs_ref,Nbits_ref]=audioread('Calibracion_94dB_1Khz_CEntrance_NTiAudio.wav');

The relevant codes are as follows:

%% Default Calibration %%

elseif s.Calibration.calibrate==0

if s.Signal.device==0

[signal_ref,Fs_ref,Nbits_ref]=audioread('Calibracion_94dB_1Khz_CEntrance_NTiAudio.wav');

elseif s.Signal.device==1

[signal_ref,Fs_ref,Nbits_ref]=audioread('Calibracion_94dB_1Khz_Art_Behringer.wav');

end

p_94dBSPL=1; %%94 dBSPL equivalen a 1 pascal

s.Calibration.Signal_Calibration=signal_ref;

s.Calibration.p_pascal_ref=p_94dBSPL;

disp('Calibraci髇 por defecto: OK');

end

%%%%%%%%%%%%%%%%%%%%%%%%

Also, I've attached this interesting sound level meter kit.

[Torsten]

My code is the kit(AppSoundLevelMeter) and it shows the following error, how can I fix it?

By reducing the number of output parameters of "audioread" from 3 to 2:

https://de.mathworks.com/help/matlab/ref/audioread.html

[ZHU z]

thank you @Torsten!,i will study the link.