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PROFESSIONAL-MACHINE-LEARNING-ENGINEER · Question #293

You work at an organization that maintains a cloud-based communication platform that integrates conventional chat, voice, and video conferencing into one platform. The audio recordings are stored in C

The correct answer is B. Use the original audio sampling rate, and transcribe the audio by using the Speech-to-Text API. If possible, set the sampling rate of the audio source to 16000 Hz. Otherwise, set the sample_rate_hertz to match the native sample rate of the audio source (instead of re-sampling). https://cloud.google.com/speech-to-text/docs/best-practices-provide-speech-data#sampling_rate

Submitted by jian89· Apr 18, 2026Data processing and feature engineering

Question

You work at an organization that maintains a cloud-based communication platform that integrates conventional chat, voice, and video conferencing into one platform. The audio recordings are stored in Cloud Storage. All recordings have an 8 kHz sample rate and are more than one minute long. You need to implement a new feature in the platform that will automatically transcribe voice call recordings into a text for future applications, such as call summarization and sentiment analysis. How should you implement the voice call transcription feature following Google- recommended best practices?

Options

  • AUse the original audio sampling rate, and transcribe the audio by using the Speech-to-Text API
  • BUse the original audio sampling rate, and transcribe the audio by using the Speech-to-Text API
  • CUpsample the audio recordings to 16 kHz, and transcribe the audio by using the Speech-to-Text
  • DUpsample the audio recordings to 16 kHz, and transcribe the audio by using the Speech-to-Text

How the community answered

(27 responses)
  • A
    11% (3)
  • B
    78% (21)
  • C
    4% (1)
  • D
    7% (2)

Explanation

If possible, set the sampling rate of the audio source to 16000 Hz. Otherwise, set the sample_rate_hertz to match the native sample rate of the audio source (instead of re-sampling). https://cloud.google.com/speech-to-text/docs/best-practices-provide-speech-data#sampling_rate

Topics

#Speech-to-Text API#Audio processing#Google Cloud#Voice transcription

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