Hello,
I am not sure I fully understood your question, but I work at MathWorks and I will try tackling this from one possible angle. The documentation page Real-Time Audio in MATLAB will tell you how to :
- Continuously read from an audio file
- Plot as you read (this example uses dsp.TimeScope, but you can use dsp.SpectrumAnalyzer instead to plot the frequency-domain spectrum). Using these scopes is generally more efficient than the basic plotting commands, it doesn't require any use of drawnow in the loop, and it gives you access to in-scope measurement utilities such as those found in common benchtop instruments
- Listen in real-time as you read and plot, so everything is synchronous with the audible audio content
I hope this helps.
