WMA to HCOM Converter

Create Macintosh HCOM Huffman audio from WMA

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Classic Mac Audio

HCOM is Huffman-compressed Mac format — convert Windows WMA for vintage Mac.

No Vintage Tools

Produce HCOM without a Mac emulator — runs online.

Quick Results

HCOM files encode rapidly from WMA.

How to convert WMA to HCOM

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

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

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

About formats

WMA (Windows Media Audio) is a family of proprietary audio codecs developed by Microsoft and first released in 1999 as part of the Windows Media framework. Created to compete with MP3 and AAC, WMA Standard uses perceptual coding to deliver what Microsoft claimed was near-CD quality at bitrates as low as 64 kbps — roughly half the data rate MP3 typically needed for comparable results. The codec family grew to include WMA Professional for surround sound and high-resolution audio, WMA Lossless for bit-perfect archival compression, and WMA Voice optimized for spoken content at very low bitrates. Deep integration with Windows, Windows Media Player, and the Zune ecosystem gave WMA a strong distribution advantage throughout the 2000s, and digital rights management (DRM) support made it attractive to online music stores of that era. Encoding and decoding are handled natively by Windows, requiring no third-party software for playback on any Windows machine. Cross-platform support has improved through libraries like FFmpeg and GStreamer, though WMA remains less universally compatible than MP3 or AAC on non-Microsoft devices. The format still appears in legacy media libraries, though newer codecs have largely taken its place for streaming and portable use.

Developer: Microsoft Corporation

Initial release: 1999

HCOM is a Huffman-coded audio format from the early Macintosh era, designed to shrink digitized sound for distribution on floppy disks and bulletin board systems when storage was precious and modems were slow. The encoder takes 8-bit unsigned PCM input, computes a frequency table of sample-delta values, and builds an optimal Huffman tree that replaces common deltas with short bit sequences. Compression ratios of 2:1 or better were typical for speech recordings, a meaningful saving when a 3.5-inch floppy held only 800 KB. Files were distributed as Macintosh resource forks and played through utilities like SoundApp and the BinHex ecosystem that defined Mac software exchange in the late 1980s. The format supported sample rates up to 22.255 kHz, matching the output capabilities of original Macintosh sound hardware. Tools such as SoX retain HCOM decoding support, ensuring that archived recordings remain accessible decades later. HCOM holds three practical advantages for preservation work: lossless compression that recovers the original samples exactly, a self-contained Huffman table embedded in each file for dependency-free decoding, and historical prevalence across thousands of vintage Mac sound archives.

Developer: Apple Computer

Initial release: 1985

Frequently Asked Questions

Why convert WMA to HCOM?

HCOM is a Huffman-compressed audio format native to classic Macintosh systems. These machines have no WMA codec, so converting to HCOM is the only way to play your audio on vintage Mac hardware or emulators.

Which programs and systems can open HCOM files?

SoX handles HCOM on all modern operating systems. Classic Mac hardware plays HCOM natively, and emulators like Basilisk II and SheepShaver support it through their Mac OS environments.

Does HCOM compression affect audio quality?

HCOM uses Huffman coding, which is lossless compression applied to the PCM data. The decoded WMA audio is preserved without quality loss, though HCOM is limited to 8-bit mono samples.

Is the HCOM format still relevant today?

HCOM is relevant only for vintage Macintosh preservation, retrocomputing projects, and academic collections of early digital audio. For modern use, formats like WAV or AIFF are preferred.

Can I convert a batch of WMA files to HCOM at once?

Yes — upload multiple WMA files and Convertio generates an HCOM version of each in parallel. Download them individually or as a single combined archive when encoding finishes.

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Specific converters

MP3 to HCOM

WAV to HCOM

M4A to HCOM

MP4 to HCOM

MOV to HCOM

OGG to HCOM

WEBM to HCOM

3GP to HCOM

FLAC to HCOM

AVI to HCOM

AAC to HCOM

WMA to HCOM

3G2 to HCOM

AAF to HCOM

ASF to HCOM

AV1 to HCOM

AVCHD to HCOM

CAVS to HCOM

DIVX to HCOM

DV to HCOM

F4V to HCOM

FLV to HCOM

HEVC to HCOM

M2TS to HCOM

M2V to HCOM

M4V to HCOM

MJPEG to HCOM

MKV to HCOM

MOD to HCOM

MPEG to HCOM

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