WMA to DVMS Converter

Encode WMA audio as DVMS German voice mail

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Voice Mail Format

DVMS is purpose-built for German telephony — convert Windows WMA for voice mail.

Online Encoding

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

Secure Processing

WMA uploads deleted after conversion, DVMS purged within 24 hours.

How to convert WMA 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

WMA (Windows Media Audio) is a family of proprietary audio codecs developed by Microsoft and first released in 1999 as part of the Windows Media framework. Created to compete with MP3 and AAC, WMA Standard uses perceptual coding to deliver what Microsoft claimed was near-CD quality at bitrates as low as 64 kbps — roughly half the data rate MP3 typically needed for comparable results. The codec family grew to include WMA Professional for surround sound and high-resolution audio, WMA Lossless for bit-perfect archival compression, and WMA Voice optimized for spoken content at very low bitrates. Deep integration with Windows, Windows Media Player, and the Zune ecosystem gave WMA a strong distribution advantage throughout the 2000s, and digital rights management (DRM) support made it attractive to online music stores of that era. Encoding and decoding are handled natively by Windows, requiring no third-party software for playback on any Windows machine. Cross-platform support has improved through libraries like FFmpeg and GStreamer, though WMA remains less universally compatible than MP3 or AAC on non-Microsoft devices. The format still appears in legacy media libraries, though newer codecs have largely taken its place for streaming and portable use.
Initial release: 1999
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 WMA to DVMS?

DVMS is the self-describing CVSD variant used by German voice mail infrastructure. WMA cannot be ingested by these telephony platforms, so conversion to DVMS is required for compatibility.

Which systems and software work with DVMS files?

German voice mail platforms, certain European telephony switches, and SoX on desktop systems all read and write DVMS. The format includes header metadata that voice mail servers rely on for routing.

How does DVMS differ from plain CVS or CVSD?

DVMS wraps CVSD-encoded audio in a self-describing header that carries sample rate and channel information. Plain CVS and CVSD are headerless, which makes DVMS easier for automated systems to process.

Will converting WMA to DVMS preserve speech clearly?

DVMS uses CVSD encoding optimized for speech frequencies. Voice recordings translate well, though music or complex audio will lose detail since the codec targets speech-band fidelity only.

Can I convert several WMA voice recordings to DVMS at once?

Yes — upload a batch of WMA files and Convertio encodes each to DVMS simultaneously. Download results individually or as a combined archive file when processing finishes.