About error"The function 'analoginput' is no longer supported. Use the session-based interface."

function [signal,Fs,Nbits,time,nfft]=Record(refreshRate)

%%This function records audio from the microphone and writes the audio into

%%a wav file in Record Mode.

% Developed by Gabriel Brais Martinez Silvosa

% September, 2013

%%Acquisition settings

sampleRate = 48000; % Hz

N=24; %N-bit/ sample

ai = analoginput('winsound');

addchannel(ai,1);

sampleRate = setverify(ai, 'SampleRate', sampleRate);

ai.TimerPeriod = refreshRate;

spt = ceil(sampleRate * refreshRate);

ai.SamplesPerTrigger = spt;

nfft=spt;

set(ai,'SamplesPerTrigger',nfft);

%%

% Start Acquisition %%

start(ai);

[data time] = getdata(ai);

%

%Record Acquisition

audiowrite(data,sampleRate,N,'16amship.wav');

%

[signal,Fs,Nbits]=audioread('16amship.wav');

delete(ai);

clear ai

hi all~

When I run matlab I get the error "The function 'analoginput' is no longer supported. Use the session-based interface"(line 13)

Does anyone know how to correct this code?

thanks a lot !

Answer 1

[Satwik]

Hi @ZHU z,

The error you are encountering is because the 'analoginput' function is part of the legacy interface for data acquisition in MATLAB. To address the issue you may refactor the code to use the 'DataAcquisition' object. Below is an updated version of the code using the 'DataAcquisition' interface:

function [signal, Fs, Nbits, time, nfft] = Record(refreshRate)
    % Acquisition settings
    sampleRate = 48000;  % Hz
    Nbits = 24;  % N-bit/sample
    nfft = ceil(sampleRate * refreshRate);

    % Create a DataAcquisition object
    dq = daq("directsound");

    % Add an audio input channel
    addinput(dq, "Audio1", 1, "Audio");

    % Set the sample rate
    dq.Rate = sampleRate;

    % Set the duration of the recording
    dq.DurationInSeconds = refreshRate;

    % Start Acquisition
    data = read(dq, seconds(refreshRate));

    % Extract time and audio data
    time = (0:length(data)-1) / dq.Rate;
    audioData = data.Audio1;

    % Record Acquisition
    filename = '16amship.wav';
    audiowrite(filename, audioData, sampleRate, 'BitsPerSample', Nbits);

    % Read the recorded audio
    [signal, Fs] = audioread(filename);

    % The number of bits per sample is assumed to be the same as specified
    % in the recording settings
    Nbits = Nbits;
end

For more information on the 'DataAcquisition' interface, please refer to the following documentation:

https://www.mathworks.com/help/daq/daq.interfaces.dataacquisition.html

I hope this helps!