@audio/measure-response

Frequency response from an impulse response — zero-padded FFT magnitude

npm install @audio/measure-response

import response from '@audio/measure-response'

Zero-pads the impulse response to n samples and takes its FFT magnitude in dB — the frequency response of whatever produced the IR. Pair with @audio/measure-ir: sweep the device, deconvolve to an IR, read the response.

let { freqs, db } = response(h, { fs, n: 8192 })

| Param | Default | | |---|---|---| | ir | — | impulse response (Float32Array) | | fs | 44100 | sample rate | | n | 8192 | FFT size; doubled up to the next power of 2 ≥ ir.length |

Returns:

| Field | | | |---|---|---| | freqs | Float32Array | bin center frequencies, Hz — length n/2 + 1 | | db | Float32Array | magnitude, dB |

Use when: reading the frequency response of a room, cabinet, or chain after IR capture — EQ matching, cabinet comparison, room-mode inspection.

Part of @audio/measure — the measure family umbrella.

MIT © audiojs