Convert legacy Dialogic / OKI ADPCM telephony audio (.vox), IVR recordings, and voicemail prompts directly into playable 16-bit WAV audio in your browser. 100% client-side with zero server uploads.
Detailed side-by-side format architecture for VOX Sound Stream / Module (.vox) and Waveform Audio File Format (.wav). Every conversion executes strictly within isolated browser memory without network transit.
Drag and drop your .vox file onto the working surface or use the system file dialog. File magic bytes are verified locally on device.
Select a quality preset (Lossless, Visually Lossless, Balanced, Smallest) or adjust advanced encoding switches in the options panel.
Click CONVERT to execute local WebAssembly compilation. Save the finished .wav directly to local storage, or stage it for chaining.
Prefer local shell scripting? Run this standard POSIX command on your machine to achieve equivalent transcoding without a web interface:
# Convert VOX to WAV locally
ffmpeg -i input.vox -codec:a pcm_s16le output.wavWorking with files across multiple web pages? The official convrtr Chrome Extension adds native Side Panel docking, right-click context menu media extraction, and visible viewport capture. Powered by the same zero-upload client-side WebAssembly engine.
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Compare 8-bit companded ITU-T G.711 telephony audio against uncompressed 16-bit linear PCM WAV. Bitrate, dynamic range, and browser playback analyzed.
A VOX file is a headerless raw audio format containing 4-bit Dialogic (OKI) ADPCM compressed voice data. It has been standard in computer telephony, PBX hardware, Asterisk, interactive voice response (IVR) systems, and retro PC games for decades.
Because VOX files lack file headers or sample rate metadata, modern media players, DAWs, and smartphones cannot play them. Converting VOX to 16-bit RIFF WAV makes speech prompts immediately audible in any media player or editing software.
Most North American and European telephony systems record Dialogic VOX at 8,000 Hz (8 kHz). Some legacy PC systems use 6,000 Hz, while wideband IVR prompts use 11,025 Hz or 16,000 Hz.
Never. All 4-bit ADPCM decompression and WAV packaging execute completely client-side inside your web browser. Sensitive call recordings and voicemail prompts remain strictly on your machine.
VOX Sound Stream / Module (VOX) and Waveform Audio File Format (WAV) serve distinct roles across the digital workflow. Converting to WAV provides optimized compatibility, modern compression efficiency, or standardized playback across web browsers, operating systems, and media production environments.
The output format (WAV) is inherently lossless or supports lossless operation. Your original visual or audio fidelity is mathematically preserved without quantization artifacts.
Never. convrtr is architected with a strict zero-upload model. All processing, decoding, decompression, and encoding happen 100% locally on your machine using sandboxed WebAssembly and Web Workers. Your data never touches an external server, database, or analytics collector.
You can execute this conversion locally via command-line utilities such as ffmpeg, cwebp, or ImageMagick. For example: see the developer terminal recipe provided in the technical specifications dossier above. convrtr provides the identical local-first capability directly inside your browser without installing CLI packages.
Yes. You can drop multiple .vox files into the instrument to process them concurrently in browser Web Workers, or click 'Open in Master Studio' to queue mixed formats, configure individual targets, and export as a single ZIP archive.
Learn how Adaptive Multi-Rate (AMR-NB and AMR-WB) speech codecs compress voice with ACELP and how convrtr synthesizes them into 16-bit linear PCM WAV without server uploads.