How to plot spectrogram with actual time?

I've tried a plenty of time now, awaring that there are many solution on the web, but none of them were working fine for my Issue.

Say I have the data

[y,fs] = audioread('path');

In order to prepare it for spectrogram:

y = y(:,1);

If I plot it now in a spectogram with same setting as on the Matlab-side:

spectrogram(y,128,120,128,1e3,'yaxis')

I'm getting a time-span of hours, even if the Signal is 140 seconds long.

Any solutions? The spectogram looks fancy, but not in that scale.

[Niklas Kurz]

attached data. It's a compressed example

Answer 1

[Niklas Kurz]

gosh,

spectrogram(y,128,120,128,fs,'yaxis')
% colormap(jet); (optional optic)

if your Data is really large and scaled in minutes you can use:

[~,F,T,P] = spectrogram(y,128,120,128,fs,'yaxis');
imagesc(T, F, 10*log10(P+eps)) % add eps like pspectrogram does
axis xy
ylabel('Frequency (Hz)')
xlabel('Time (s)')
h = colorbar;
h.Label.String = 'Power/frequency (dB/Hz)';

According to Stack exchange. Thank you documentations!