You want to double the speed of a WAV audio file using scipy.io.wavfile. Which approach correctly achieves this?

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SciPy - Integration with Scientific Ecosystem

You want to double the speed of a WAV audio file using scipy.io.wavfile. Which approach correctly achieves this?

ADouble the sample rate value and write the original data unchanged

BRead the file, then write only every second sample to a new file

CHalve the sample rate value and write the original data unchanged

DReverse the audio data array and write it with the original sample rate

Step-by-Step Solution

Solution:

Step 1: Understand speed and sample rate relation
Speed changes by adjusting sample rate: doubling sample rate doubles playback speed.
Step 2: Apply correct method
Keep audio data unchanged but write with double the original sample rate to speed up playback.
Final Answer:
Double the sample rate value and write the original data unchanged -> Option A
Quick Check:
Speed ∝ sample rate, double rate doubles speed [OK]

Quick Trick: Change sample rate to speed up audio, not data length [OK]

Common Mistakes:

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