VOC to SOU Converter

Turn Sound Blaster VOC audio into SBStudio SOU format

Drop files here. 1 GB maximum file size or Sign Up
to
Facebook Amazon Microsoft Tesla Nestle Walmart L'Oreal

VOC to SOU Bridge

Move audio from the Sound Blaster ecosystem directly into SBStudio II — both formats share the same Creative Labs heritage.

Server-Side Processing

Conversion runs in the cloud, so your machine stays unburdened. No local utilities or DOS environments required.

Private and Secure

Uploaded VOC files are removed immediately after processing, and converted SOU files are deleted within 24 hours.

How to convert VOC to SOU

1

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

2

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

3

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

About formats

VOC (Creative Voice) is a digital audio container developed by Creative Technology and introduced alongside the original Sound Blaster card in 1989. It served as the native audio format for the Sound Blaster family during the DOS era, when Creative's hardware dominated PC audio. VOC files are block-based: each file consists of typed data blocks that can carry 8-bit unsigned PCM, 4-bit and 2.6-bit Creative ADPCM, 16-bit signed PCM, as well as A-law and mu-law encoded audio. This block structure also supports silence intervals, repeat loops, and marker points, giving game developers fine-grained control over sound playback. A notable advantage was hardware-level decoding — Sound Blaster cards could play VOC data directly via DMA transfer, freeing the CPU for other tasks in an era when processor cycles were precious. The format saw extensive use in DOS games from id Software, Sierra, and LucasArts. With the rise of Windows and the WAV format, VOC gradually fell out of mainstream use, yet it remains important for retro gaming preservation and for anyone working with vintage PC audio archives.
Initial release: 1989
SOU is a raw audio format designation that functions as an alias for unsigned 8-bit PCM data (u8) in the SoX audio processing framework. Files with the .sou extension contain headerless, uncompressed audio samples stored as unsigned 8-bit integers — each byte represents a single amplitude value from 0 to 255, with 128 as the silence midpoint. Because there is no header, playback parameters such as sample rate and channel count must be specified externally. The default assumption is typically mono at 8000 Hz, though the data can represent any rate the recording hardware supported. The u8 encoding that SOU aliases is one of the simplest possible digital audio representations, predating structured audio containers like WAV and AIFF. Raw unsigned PCM was commonly produced by early sound cards and digitizers in the late 1980s and early 1990s, when storage constraints and limited processing power made headerless formats a practical choice. One advantage is absolute simplicity: SOU files can be read by any program capable of basic file I/O, with no parsing of container structures or metadata decoding required — useful for embedded systems, hardware diagnostics, and educational contexts where audio fundamentals are being explored. The format's minimal overhead also means that conversion to any modern container is lossless and instantaneous, since the raw PCM samples can be wrapped in a WAV or AIFF header without any transcoding.
Developer: SoX Contributors
Initial release: 1991

Frequently Asked Questions

Why convert VOC to SOU?

SOU is native to SBStudio II, an early DOS-based sound editor. Converting VOC to SOU lets you edit Sound Blaster recordings in their original companion software.

What can open SOU files?

SBStudio II on DOS handles SOU files natively. Modern alternatives like Audacity or SoX can also import SOU data after conversion.

Does the conversion preserve all VOC data blocks?

The converter reads all audio data blocks from the VOC container and transfers the PCM content into the SOU format faithfully.

Is SOU a common format today?

No — SOU is a niche legacy format from the SBStudio II era. It sees occasional use in retro computing and digital preservation circles.

Can I convert multiple VOC files at once?

Absolutely. Batch-upload your VOC recordings and generate SOU versions for all of them simultaneously.