@modplayjs/fmt-it

Impulse Tracker (IT) format plugin for @modplayjs/core — the most feature-heavy loader in the family:

• IT214 / IT215 sample decompression (itsex.ts, bit-exact port)
• Full NNA / DCA / DCT new-note-action semantics
• IT envelope susloops, note delay, pattern loops
• MIDI macro configuration (MIDI.XML-style CC/NNA macros)
• OpenMPT compatibility flags (MPT preamp, extended sample options)
• CHBI compressed patterns

Install

npm install @modplayjs/fmt-it

Usage

import { CorePlayer } from '@modplayjs/core';
import { plugin as itPlugin } from '@modplayjs/fmt-it';

const core = new CorePlayer();
core.registries.registerFormat(itPlugin);
core.loadModule(bytes);   // .it file

Also exports

• itExportPlugin — write IT modules back out.
• itTest / itLoad — direct loader access.
• applyMptPreamp — OpenMPT preamp compatibility helper.

Part of the modplayjs monorepo. BSD-3-Clause.