MAUD to NIST Converter

Transform Amiga MAUD recordings to NIST online

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MAUD to NIST

Transform vintage Amiga MAUD recordings into NIST — bridging retro computing audio with linguistic corpora and acoustic research.

No Amiga Required

Convert MAUD to NIST without booting an Amiga emulator or installing vintage software. Works from any modern platform.

Quick Results

MAUD files are typically compact. Conversion to NIST completes rapidly on our cloud servers with minimal wait.

How to convert MAUD to NIST

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

Choose nist or any other format you need as a result (more than 200 formats supported)

Let the file convert and you can download your nist file right afterwards

About formats

MAUD is an audio file format developed by MacroSystem for the Commodore Amiga platform, introduced in the early 1990s as part of their digital video and audio production tools. Built on the Amiga IFF (Interchange File Format) chunk architecture, MAUD files organize data into clearly delineated chunks — MHDR for the header, MDAT for sample data, and optional annotation chunks for metadata. The format supports mono and stereo layouts with bit depths of 8 or 16 bits and sample rates up to 48 kHz, which represented professional-grade specifications on Amiga hardware. Both signed linear PCM and A-law/mu-law encodings are available, offering a choice between fidelity and file size. MAUD saw primary use in the Amiga video production community, where MacroSystem Retina and VLab Motion boards demanded synchronized audio that the standard 8SVX format could not deliver. Conversion support exists today through SoX and libsndfile, ensuring vintage Amiga productions remain recoverable. Three distinct advantages stand out: clean IFF-based structure that any chunk-aware parser can navigate, 16-bit stereo capability ahead of typical Amiga audio, and lightweight overhead that left maximum CPU headroom for video rendering.

Developer: MacroSystem Computer GmbH

Initial release: 1992

NIST SPHERE (SPeech HEader REsources) is a specialized audio file format created by the National Institute of Standards and Technology for speech research, particularly projects funded by DARPA. The format wraps raw audio samples with a structured ASCII header encoding metadata such as sample rate, channel count, encoding type, speaker demographics, and transcription annotations — making it ideal for distributing speech corpora. NIST files typically store uncompressed PCM or mu-law audio at telephone-quality sample rates (8 kHz or 16 kHz), though the container is flexible enough to hold various encodings. A key advantage is the rich self-documenting header that lets researchers embed detailed corpus metadata directly in the file, eliminating sidecar files. SPHERE has also become the de facto standard for major speech databases like TIMIT, Switchboard, and the Fisher corpus, ensuring broad recognition across academic and government labs. The open specification and availability of command-line tools (sphere, h_strip, w_decode) make it straightforward to convert, inspect, and process these files programmatically in speech processing pipelines.

Developer: National Institute of Standards and Technology

Initial release: 1990

Frequently Asked Questions

Why convert MAUD to NIST?

NIST provides speech data exchange format. Converting from MAUD brings vintage Amiga audio into this format for linguistic corpora and acoustic research.

What opens NIST files?

SoX, Kaldi, HTK, and NIST sphere tools can handle NIST format files for playback and editing.

Is quality preserved?

Quality depends on the NIST encoding. The conversion faithfully represents whatever audio content the MAUD source contains.

What is MAUD?

MAUD is a Commodore Amiga audio format from 1985, used by Amiga audio software for samples and recordings. It requires conversion for modern use.

Can I batch convert?

Upload multiple MAUD files and convert them all to NIST at once — process your entire Amiga audio collection in one session.

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