HCOM to CDDA Converter

Extract HCOM audio into raw CD Digital Audio format

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CD-Standard Output

Transform HCOM into CDDA — raw audio at the exact specification used on commercial music CDs: 44.1 kHz, 16-bit, stereo.

Uncompressed Quality

CDDA stores raw PCM data with zero compression. Every detail from the HCOM source is preserved in the output.

Secure Conversion

Uploaded HCOM files are deleted immediately. CDDA results are purged from servers within 24 hours.

How to convert HCOM to CDDA

1

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

2

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

3

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

About formats

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
CDDA (Compact Disc Digital Audio), known as the Red Book standard, defines audio stored on music CDs. Jointly developed by Sony and Philips and published in 1980, it established parameters that shaped digital audio for decades: 16-bit linear PCM at 44.1 kHz stereo, yielding 1,411.2 kbps uncompressed. Each disc holds up to 80 minutes organized into tracks with index points, sub-channel data for text display, and error correction codes (CIRC) ensuring reliable playback despite minor scratches. When audio is ripped from a CD, the resulting stream is often saved with the .cdda extension as raw PCM before conversion. The most obvious advantage is uncompressed, lossless nature — what reaches your ears is mathematically identical to the studio master at the specified resolution. Robust error correction provides excellent resilience, maintaining audio integrity even when disc surfaces suffer moderate wear. Having sold billions of units since the first commercial release in 1982, CDDA established baseline quality expectations for digital music and remains the reference against which compressed codecs are measured.
Developer: Sony / Philips
Initial release: October 1980

Frequently Asked Questions

What is CDDA?

CDDA is Compact Disc Digital Audio — raw, uncompressed PCM audio at 44.1 kHz, 16-bit stereo. The exact format used on music CDs.

Why convert HCOM to CDDA?

If you need HCOM audio in raw CD-standard format for disc burning or audio workflows that expect CDDA-specification audio data.

Is CDDA lossless?

CDDA is uncompressed raw PCM. The conversion preserves whatever quality the HCOM source contains, at CD-standard specifications.

Can I burn this to a CD?

CDDA is the native format for audio CDs. The output can be used directly in CD burning software that accepts raw audio data.

What is the file size?

CDDA is uncompressed — roughly 10 MB per minute of stereo audio. For short HCOM clips, the CDDA output stays small.