SoundStream Neural Codec Quiz

Answers and explanations appear as you take the quiz.

1. Which three components make up the SoundStream architecture?
   • Encoder, residual vector quantizer, and decoder
   • Tokenizer, transformer, and vocoder
   • Spectrogram, attention layer, and classifier
   • Compressor, equalizer, and amplifier
2. What technique lets a single SoundStream model serve many different bitrates without retraining?
   • Spectral subtraction
   • Quantizer dropout (scalable RVQ)
   • Beam search decoding
   • Dynamic range compression
3. In Google's listening tests, SoundStream at 3 kbps was reported to outperform which codec at 12 kbps?
   • MP3
   • FLAC
   • Opus
   • AAC
4. What kind of additional training signal does SoundStream use to make output sound natural?
   • A reinforcement learning reward model
   • A hidden Markov model
   • A rule-based audio filter
   • A GAN-style adversarial discriminator
5. How does SoundStream's bitrate relate to its quantizers?
   • More active quantizer layers increase the bitrate
   • Bitrate is fixed regardless of quantizers
   • Fewer quantizers always raise the bitrate
   • Quantizers only affect latency, not bitrate
6. Why is SoundStream significant for generative audio models?
   • It removes all background noise from any recording
   • Its discrete tokens serve as inputs for models like AudioLM and MusicLM
   • It only works on text, not audio
   • It replaces the need for any neural network
7. Which factors determine SoundStream’s bitrate in the guide’s simplified relationship?
   • Audio duration and speaker identity only
   • The number of loss functions and dataset labels
   • Frame rate, active quantizer count, and bits per codebook
   • The decoder’s color depth and image resolution
8. Why does quantizer dropout help SoundStream degrade gracefully at lower rates?
   • It removes the encoder from the architecture
   • It makes every codebook transmit more bits
   • It replaces reconstruction with a language-model loss
   • It trains earlier codebooks to retain the most important information when later ones are omitted