VOC to OPUS Converter

How to Convert VOC to Opus Online

1. Upload Your VOC File: Drag and drop or click "Add Files" to select Creative Voice (.voc) files from your computer. DOSBox audio rips, vintage Sound Blaster recordings, retro-game asset extracts, and old multimedia CD-ROM dumps all work. Batch is supported — drop in an entire SOUND directory at once.
2. Pick Quality Preset or Custom Bitrate: Default is Highest. Opus is exceptionally efficient — 64 kbps already sounds clean for speech, 96 kbps is transparent for most music, and 128 kbps is overkill for nearly any 8-bit/16-bit VOC source. Use Constant Bitrate (predictable size, broadcast/streaming) or Variable Bitrate (better quality-per-byte, default Opus mode). Set a specific file size, or enter a Custom Bitrate anywhere from 6 kbps to 510 kbps.
3. Audio Channel, Audio Sample Rate, Trim (Optional): Pick Mono (typical for VOC speech samples) or Stereo. Opus resamples internally to 48 kHz regardless of input rate, but you can declare 8000-48000 Hz to match the original block rate (most VOC files are 11.025 kHz or 22.05 kHz). Trim by start time and duration in HH:MM:SS.sss format — handy for skipping the silence blocks VOC files often embed between samples.
4. Convert and Download: Click Convert. Files process on our servers and download individually or as a ZIP — no sign-up, no watermark.

Why Convert VOC to Opus?

VOC (Creative Voice) is the native audio container Creative Technology introduced with the original Sound Blaster card in 1989, and it dominated DOS-era PC audio through the mid-1990s. A VOC file is block-based: chunks of 8-bit unsigned PCM, 4-bit Creative ADPCM, 16-bit signed PCM, A-law, or μ-law, optionally separated by silence blocks, loop markers, or sample-rate changes. Opus is the modern endpoint — an IETF-standardized codec (RFC 6716, 2012) that's mandatory in WebRTC and dominant in Discord, YouTube, WhatsApp, and Zoom voice. Converting bridges roughly three decades of audio technology:

• Modern playback everywhere — VOC needs a vintage SB driver, FFmpeg, Audacity, or a retro-audio tool to play. Opus plays natively in Chrome, Firefox, Edge, Safari 11+, Android, and on iOS 17+ in Apple Music. Drop the file into any modern browser tab and it just plays.
• Tiny files for game-audio archives — VOC is often stored as raw 8-bit/22 kHz PCM (~22 KB/sec). The same audio at 64 kbps Opus is ~8 KB/sec, a 60-70% reduction. A 50 MB folder of DOS-era voice samples becomes ~15 MB without audible loss for speech.
• Discord, WhatsApp, and voice-chat uploads — Discord's free-tier 10 MB attachment cap (lowered from 25 MB in September 2024) and WhatsApp's 100 MB media cap both prefer Opus internally. Sending a VOC sample as Opus avoids re-encoding on the receiving end.
• Retro-gaming preservation and modding — Many DOSBox and ScummVM communities now distribute extracted audio in Opus to keep mod archives portable. Opus retains the muffled 8-bit character at 24-32 kbps if you want authenticity, or cleans it up at 96 kbps if you don't.
• Podcasting and voiceover remix — Old VOC dialogue clips (game lines, sample CDs, voice acting demos) drop straight into modern DAWs after conversion. Most DAWs since 2020 import Opus directly; older ones can import via the same xconvert pipeline.
• Web embedding — <audio src="clip.opus"> works in every modern browser without a fallback. The same VOC needs server-side conversion or a polyfill nobody maintains anymore.

VOC vs Opus — Format Comparison

Opus Bitrate Quick Guide

Frequently Asked Questions

Why convert VOC to Opus instead of MP3 or WAV?

Opus beats MP3 at every bitrate below 128 kbps and roughly matches it at 192 kbps, while being royalty-free and natively supported by WebRTC. For a typical 22 kHz 8-bit VOC speech sample, 48 kbps Opus sounds cleaner than 96 kbps MP3 at half the file size. If you specifically need MP3 for legacy device compatibility, try VOC to MP3. If you want lossless preservation of the original PCM data, use VOC to WAV or VOC to FLAC instead — Opus is lossy and discards inaudible data by design.

What plays Opus files?

Modern browsers (Chrome, Firefox, Edge, Safari 11+), VLC, foobar2000, Audacious, MPV, Discord and most Discord-bot tooling, Telegram, WhatsApp voice notes (internally), Android since 5.0, iOS 17+ in Apple Music, and any FFmpeg-based player. Windows Media Player on Windows 10/11 plays Opus in the.opus container via the bundled Web Media Extensions. macOS QuickTime needs a third-party component but VLC works out of the box.

Will the silence blocks and loop markers from my VOC file transfer?

No — Opus has no equivalent for VOC's block-level features. Loop points, marker labels, and mid-stream sample-rate changes are flattened to a continuous audio stream during conversion. If you need the silence intervals preserved as actual silence, they will be; if you needed the markers for game-engine playback control, you'll need to re-author those in your target engine.

What sample rate should I pick for vintage 8-bit VOC files?

Opus always resamples to 48 kHz internally regardless of what you declare, so the input sample rate setting is mostly for accurate timing — match the original VOC block rate (commonly 11.025 kHz or 22.05 kHz for 8-bit Sound Blaster recordings). Upsampling won't add detail that wasn't in the original PCM; the resulting Opus will just describe the same 8-bit signal more efficiently.

Should I use Constant Bitrate or Variable Bitrate?

VBR (variable bitrate, Opus's default) gives better quality per byte by spending more bits on complex passages and fewer on silence — ideal for game audio that mixes speech, sound effects, and silence blocks. Use CBR (constant bitrate) only if you need a predictable file size, are streaming over a fixed-bandwidth channel, or are pre-allocating storage in a retro-gaming asset pack. For 99% of VOC archive work, VBR is correct.

Can I batch-convert a folder of VOC files extracted from a DOS game?

Yes. Drop in the entire SOUND or AUDIO directory — common when extracting assets from DOS games like Wolfenstein 3D, Doom, or Monkey Island. Settings apply uniformly across the batch, and the files download as a ZIP. If a few files in the batch use 16-bit blocks while others are 8-bit, the conversion handles each correctly without manual intervention.

My VOC file has multiple sample rates in different blocks — will that survive?

VOC files can change sample rate mid-stream (a 1990s Sound Blaster trick to save space on long recordings). FFmpeg's VOC demuxer resamples each block to a common rate before encoding, so the Opus output is a single continuous stream at one effective rate. The audio sounds the same; you just lose the per-block metadata.

Is Opus better than Vorbis for converting VOC?

Yes, at every bitrate below ~128 kbps. Opus was designed as Vorbis's successor by the same core developers (Xiph.Org) and reaches transparency around 96 kbps where Vorbis needs 150-170 kbps. The only reason to pick VOC to OGG Vorbis instead is compatibility with older players or game engines that predate ~2014 Opus support.