CONVERT
SND → VOC
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Fast, secure SND to VOC conversion. No registration required.
SND is an audio format with specific trade-offs between file size, bitrate flexibility, and device support. Reaching a VOC from there is one hop. A SND to VOC conversion is typically about compatibility: some players refuse SND, many accept VOC. The audio payload makes the round trip with minimal artefacts when bitrate is left at sensible defaults. Drop a SND file into the uploader and the VOC comes back in seconds. Keep in mind SND is an audio format with specific trade-offs between file size, bitrate flexibility, and device support. And remember that VOC is the Creative Labs Voice format from the Sound Blaster era.
NeXT Sound
Source formatSND (NeXT Sound) is an audio file format originating from NeXT computers and later adopted by Sun Microsystems as the AU format. It stores audio with a simple header and supports various encodings from 8-bit mu-law to 32-bit floating point.
Creative Voice
Target formatVOC (Creative Voice) is an audio file format created by Creative Labs for Sound Blaster sound cards. It was a dominant PC audio format in the DOS gaming era, supporting multiple data blocks with different sample rates within a single file.
Why convert SND to VOC
Moving from SND to VOC usually buys compatibility or a friendlier file size. For spoken-word content the difference is inaudible; for high-resolution music pick the highest bitrate the VOC codec supports to avoid compounding compression.
HOW TO CONVERT
SND → VOC
Provide the audio file
Drag the SND onto the uploader. Files up to 25 MB run on the free tier without registration; paid plans go up to 2 GB.
ffmpeg handles the conversion
Our ffmpeg-based pipeline reads sample rate and channel layout, then writes a matching VOC with ID3 tags intact.
Save the output
Click to download the VOC. Batch uploads are bundled into a ZIP for single-click retrieval.
Common Use Cases
Share across platforms
Send VOC files to anyone without worrying about whether they have the right software for SND.
Embed in documents
Drop VOC output into Word, Google Docs, PowerPoint, Notion or a website without conversion warnings.
Optimize size
VOC often produces smaller files than SND for web, email and storage.
Archive & future-proof
Store in a widely-supported format that will still open on future operating systems without legacy plugins.
SND vs VOC — Strengths and limitations
What each format does best, and where it falls short.
SND Strengths
- Historical NeXT archive format.
- Compatible with Sun AU.
- Simple header structure.
Limitations
- Legacy — no new content.
- Ambiguous — NeXT .snd and Mac .snd are different formats.
- Requires specialized tooling for Mac resource-fork variant.
VOC Strengths
- Retro-gaming archive format.
- Supported by DOSBox and SoX.
- Block-based structure allows streaming.
Limitations
- Legacy — no new content since mid-1990s.
- Limited sample rates (up to 44.1 kHz).
- No metadata.
SND vs VOC — Technical specifications
Side-by-side comparison of the technical details.
SND
- MIME type
- audio/basic
- Extension
- .snd
- NeXT variant
- Identical to Sun AU
- Mac variant
- HFS resource fork format
VOC
- MIME type
- audio/x-voc
- Extension
- .voc
- Codecs
- PCM 8/16-bit, ADPCM
- Hardware origin
- Sound Blaster Pro (1991)
| Specification | SND | VOC |
|---|---|---|
| MIME type | audio/basic | audio/x-voc |
| Extension | .snd | .voc |
| NeXT variant | Identical to Sun AU | — |
| Mac variant | HFS resource fork format | — |
| Codecs | — | PCM 8/16-bit, ADPCM |
| Hardware origin | — | Sound Blaster Pro (1991) |
SND vs VOC — Typical file sizes
Approximate file sizes for common scenarios.
SND
- NeXT System alert 5-50 KB
VOC
- DOS game sound effect 5-50 KB
- Short speech sample 30-300 KB
Quality & Compatibility
Sample rate, channel layout and bit depth are preserved by default: a 44.1 kHz stereo SND becomes a 44.1 kHz stereo VOC. Metadata — title, artist, album, cover art — travels where both formats support it. Protected DRM content cannot be converted legally and is rejected.
Tips for Best Results
- Check the podcast host specification before choosing bitrate — some mandate CBR 64 kbps, others accept VBR up to 192 kbps.
- Preserve ID3 tags by editing them before conversion; Mp3tag and MusicBrainz Picard handle round-tripping cleanly.
- If the SND is 24-bit studio audio, the VOC at 16-bit is sufficient for listening; higher is wasted on consumer playback gear.
Frequently Asked Questions
Lossy-to-lossy conversions (most combinations) re-compress the audio, which technically introduces some loss. At a 192 kbps or higher target it is inaudible on normal equipment. Lossy-to-lossless conversions freeze the existing quality but cannot improve it; lossless-to-lossy transcodes are only as good as the target bitrate you choose.
For voice content (podcasts, audiobooks, lectures) 128 kbps is indistinguishable from higher bitrates. For music, 192-256 kbps covers most listening; 320 kbps is the ceiling for VOC and the right choice for audio you plan to edit further. Above that, prefer a lossless target instead.
Yes. Title, artist, album, year and cover art travel from the SND container to the VOC container automatically where both formats support them. If a tag field has no VOC equivalent, it is dropped silently. Use any tag editor (Mp3tag, MusicBrainz Picard) to fine-tune afterwards.
RELATED CONVERSIONS
Other popular pairs involving SND or VOC
More from SND
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Related comparisons
See these formats side by side to understand which fits your use case best.
Secure & Private Conversion
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