Converting continuous sound to digital requires time sampling then numeric quantization

Evidence

Signals that use electrical or electronic circuits and work with signal values on a continuous scale are called analogue signals and methods that process them are called analogue signal processing. Such signals are, in most cases, considered to be continuously observable in time and thus are called continuous-time signals. If such a continuous-time signal is sampled properly at specific moments in time, a discrete-time signal is obtained. When these samples are further converted to discrete numbers, the result is called a digital signal. Methods and techniques to cope with such number sequences are called digital signal processing, or DSP for short. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 323

Categorization

• DEFINE: Clean step-by-step definition of the analogue-to-digital signal chain that underpins all acoustic communication processing.
• XREF: connects to: Digital audio capture is governed by sampling rate and bit depth — Almo Farina, Soundscape Ecology: Principles,…, 1948