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先理解频率分量,再区分采样与量化

傅里叶变换演示如何从混合信号中分离频率成分;数字音频演示强调采样与量化是不同步骤;连读可避免把频谱分析、采样重建和量化误差混为一谈。

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对照原文

It pulls out the original frequencies from their jumbled up sums
But what is the Fourier Transform? A visual introduction. · ▶ 10:29–10:33
the sampling step is perfect it loses nothing
D/A and A/D | Digital Show and Tell (Monty Montgomery @ xiph.org) · ▶ 9:38–9:47

两支视频的教学重点不同;傅里叶变换本身并不保证任意采样信号都能无损重建。