WAV to DVMS Converter

Encode uncompressed WAV as DVMS voice mail audio

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Pristine Source

Uncompressed WAV gives DVMS the cleanest speech encoding possible.

Voice Mail Format

DVMS is built for German telephony — produce from uncompressed WAV.

Online Encoding

No telephony tools needed — convert WAV to DVMS in your browser.

How to convert WAV to DVMS

1

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

2

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

3

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

About formats

WAV (Waveform Audio File Format) is an uncompressed audio container jointly developed by Microsoft and IBM, first published in August 1991 alongside Windows 3.1. Built on the Resource Interchange File Format (RIFF), WAV stores audio data — most commonly as linear pulse-code modulation (LPCM) — together with metadata describing sample rate, bit depth, and channel count. This straightforward structure has made WAV the de facto standard for uncompressed audio on Windows and a universally accepted interchange format across virtually every operating system, audio editor, and media player in existence. CD-quality WAV files use 16-bit samples at 44.1 kHz stereo, while professional workflows routinely employ 24-bit or 32-bit float samples at rates up to 192 kHz. A major advantage is zero-loss fidelity: because standard WAV applies no compression, the stored data is an exact digital representation of the original recording, making it the preferred choice for mastering and archiving. WAV also supports embedded metadata through INFO and BWF chunks, enabling timestamping and production notes. The main trade-off is file size — one minute of CD-quality stereo occupies roughly 10 MB — and the 32-bit RIFF structure imposes a 4 GB limit, though RF64 removes that ceiling.
Developer: Microsoft and IBM
Initial release: August 1991
DVMS (Dutch Voice Messaging System) is a telephony-grade audio encoding born from the Netherlands' early push toward digital voicemail infrastructure. Deployed through KPN (formerly PTT Telecom) in the mid-1980s, the format stores mono voice data at a narrow 8 kHz sample rate, prioritizing compact message size over sonic breadth. Audio is compressed with a proprietary variant of logarithmic companding similar to European A-law encoding, squeezing recordings to roughly 8 kbit/s while keeping speech intelligible. Each file carries a small header identifying sample rate, compression type, and message metadata, which made automated routing across early PBX and voicemail systems straightforward. Although DVMS never gained traction outside Dutch telecom circles, it influenced how European carriers designed later voice messaging protocols. Tools like SoX and several legacy telephony libraries still read and write DVMS files, allowing archival playback of decades-old messages. Among its practical advantages: extremely small file sizes (a one-minute message occupies roughly 60 KB), reliable speech clarity despite aggressive compression, and a simple container layout that is easy to parse programmatically.
Developer: Dutch PTT Telecom
Initial release: 1984

Frequently Asked Questions

Why convert WAV to DVMS?

DVMS is a CVSD-based voice format used in German telephony and voice mail systems. Uncompressed WAV provides an artifact-free source for the clearest possible speech encoding.

What systems and tools support DVMS files?

German voice mail platforms use DVMS natively, European telephony infrastructure supports it, and SoX can read and write DVMS files for command-line processing and analysis.

How does DVMS differ from VMS?

Both carry CVSD-compressed voice data with self-describing headers for German telephony. DVMS has minor structural differences in metadata, but the audio payload is similar.

Does starting from WAV produce better DVMS output?

Yes — WAV stores uncompressed PCM, so the CVSD encoder gets a clean signal. A lossy source would permanently embed compression noise into the resulting voice recording.

Can I encode multiple WAV files to DVMS at once?

Yes — upload your WAV voice recordings and convertio.tools encodes each one to DVMS simultaneously, which is efficient for preparing telephony system audio in bulk.

WAV to DVMS Quality Rating

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