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#spectrogram

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01 ·Audio & Speech·★ MEMBER·PAPER·13 min read Representing Sound — Mel Spectrograms and Audio Tokens Why speech models never eat raw waveforms, and what they eat instead: the chain from short-time Fourier transform to the mel scale to the log to discrete tokens. Covers the window-length tradeoff, why MFCCs dropped the DCT, how acoustic and semantic tokens differ, and the config mismatches that silently wreck audio in production. 02 ·Audio & Speech·FREE·11 min read Speech Recognition from Scratch — From Waveform to Text How a stream of numbers from a microphone becomes words, starting from zero: spectrogram features, the alignment problem that CTC solved, autoregressive encoder-decoder models, and Whisper — in the order history solved them.