in audio signal, what are the advantages and disadvantages of increasing and decreasing sample rate?

Question

Also, what are pros and cons of changing quantization steps? These questions been wondering over my head and i wasn't able to find any suitable answer anywhere else. would appreciate your help :)

Answer 1

Is it an homework?
In any case:
increasing sample rate: audio reproduction is more accurate but memory occupation is higher
decreasing sample rate: memory occupation is lower but audio reproduction is less accurate
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