the gradient

a field guide to voice

everything voice, from air pressure to agents.

I’m building a practical A–Z of how machines listen, understand, speak, fail, and earn trust. It will grow slowly, in public.

Explore A–Z ↓See published writing
26 letters6 layersone growing map

No content farm. No fake completeness. Just the concepts, experiments, failures, and diagrams I actually understand.

one voice, many systems

follow a sentence through the stack

Tap any stage. This is the path the atlas will slowly unpack—one experiment and field note at a time.

Capture

A microphone turns air pressure into samples.

the voice atlas

A to Z, without pretending it is simple.

Some letters have stories. Some are just a map for now. The empty space is intentional—I’ll fill it as I learn.

Barge-in

draft

Not written yet. The topic map is ready; the explanation will be Anshul’s.

  • Beamforming
  • Barge-in
  • Buffers

Conversation

draft

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  • CTC
  • Codecs
  • Conversational AI

Diarization

draft

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  • Diarization
  • Denoising
  • DSP

Echo

draft

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  • Echo cancellation
  • Endpoints
  • Embeddings

Forced alignment

draft

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  • Forced alignment
  • Features
  • Front-end processing

Graphemes

draft

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  • G2P
  • Gain control
  • Griffin–Lim

Hotwords

draft

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  • Hotwords
  • Hallucinations
  • HMMs

Interruption

draft

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  • Intent
  • Inference
  • Interruption

Jitter

draft

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  • Jitter
  • Jitter buffers
  • Jitter measurement

Keyword spotting

draft

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  • Keyword spotting
  • KWS
  • Keyphrase biasing

Latency

draft

Not written yet. The topic map is ready; the explanation will be Anshul’s.

  • Latency
  • Language models
  • Loudness

Microphones

draft

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  • Microphones
  • Multilingual speech
  • MOS

Noise

draft

Not written yet. The topic map is ready; the explanation will be Anshul’s.

  • Noise suppression
  • Neural vocoders
  • Normalization

Overlap

draft

Not written yet. The topic map is ready; the explanation will be Anshul’s.

  • Overlapping speech
  • Opus
  • Out-of-domain audio

Prosody

draft

Not written yet. The topic map is ready; the explanation will be Anshul’s.

  • Prosody
  • Phonemes
  • Pronunciation

Quality

draft

Not written yet. The topic map is ready; the explanation will be Anshul’s.

  • Quality evaluation
  • Quantization
  • Question detection

Real time

draft

Not written yet. The topic map is ready; the explanation will be Anshul’s.

  • Real-time factor
  • Resampling
  • RNN-T

Streaming

draft

Not written yet. The topic map is ready; the explanation will be Anshul’s.

  • Streaming
  • Speaker ID
  • Speech synthesis

Turn-taking

draft

Not written yet. The topic map is ready; the explanation will be Anshul’s.

  • Turn-taking
  • TTS
  • Transducers

Utterances

draft

Not written yet. The topic map is ready; the explanation will be Anshul’s.

  • Utterances
  • Upsampling
  • Underflow

Voice activity

draft

Not written yet. The topic map is ready; the explanation will be Anshul’s.

  • VAD
  • Vocoders
  • Voice cloning

Word error rate

draft

Not written yet. The topic map is ready; the explanation will be Anshul’s.

  • WER
  • Wake words
  • Waveforms

X-vectors

draft

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  • X-vectors
  • Cross-talk
  • Cross-lingual speech

YIN

draft

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  • YIN pitch
  • Yield
  • Your voice data

Zero-shot voice

draft

Not written yet. The topic map is ready; the explanation will be Anshul’s.

  • Zero-shot synthesis
  • Zero crossing
  • Zero-shot ASR

field notes

learned by building, not copied from a glossary

A · listen

Studio verification draft

A temporary draft used to verify autosave and diagram editing.

Read story →A · listen

Untitled story

A new note from the voice atlas.

Read story →

the promise

Every complicated voice idea should eventually have a page that makes it click.

Back to A–Z ↑