@audio/measure-response

Status calibrated

npm1.0.2licenseMIT

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

Overview

Install
Updated: 2026-10-12
Family: measure, 7 packages under it
Tags: measure

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.