std::span<T> provides a lightweight, non-owning view over contiguous memory (C arrays, std::vector, std::array, memory-mapped files):

void ProcessSamples(std::span<const float> samples) {
    for (float val : samples) {
        // Process samples safely
    }
}

Instead of taking const float* pData, size_t count, std::span encapsulates both the pointer and length in a single object with .subspan(), .data(), and .size(), preventing buffer overruns.

std::span with static extent (std::span<int, 4>) is only 8 bytes (pointer only), while dynamic extent (std::span<int>) is 16 bytes (pointer + size).

Modern C++ API design guideline: use std::span whenever accepting contiguous data buffers in functions.