OGG to DVMS Converter

Encode OGG audio as DVMS German voice mail format

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Voice Mail Format

DVMS is purpose-built for German voice mail — convert OGG recordings into telephony-ready audio files.

Online Encoding

No telephony SDK needed — the OGG to DVMS conversion runs on our cloud infrastructure.

Rapid Processing

Voice format encoding is lightweight — DVMS files from OGG sources are produced almost instantly.

How to convert OGG 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

OGG Vorbis is an open, royalty-free lossy audio codec inside the Ogg container format, both developed by the Xiph.Org Foundation. Vorbis was designed as a patent-free alternative to MP3 and AAC, using modified discrete cosine transform (MDCT) coding with variable bitrate encoding that adapts to signal complexity per frame. Blind listening tests have consistently shown Vorbis delivering perceptual quality matching or exceeding MP3, especially in the 96-192 kbps range. The format supports sample rates from 8 kHz to 192 kHz and 1 to 255 channels, covering everything from mono voice to surround mixes. A standout advantage is the complete absence of licensing fees — game developers, streaming platforms, and hardware makers can implement Vorbis without royalty concerns. Spotify relied on Vorbis for years as its primary streaming codec for exactly this reason. The format also handles quality degradation at low bitrates more gracefully than many competitors, which is why it remains popular in video games where storage is tight and thousands of sound effects compete for space. VLC, Firefox, Chrome, and Android all provide native Vorbis decoding.
Initial release: May 1, 2000
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 OGG to DVMS?

DVMS is used in German telephony voice mail systems. It stores speech using CVSD modulation in a self-describing container format.

What uses DVMS files?

German voice mail platforms and certain European telephony systems consume DVMS audio. SoX can also read and write this format.

Is DVMS the same as CVSD?

DVMS is a self-describing variant of CVSD — it includes metadata headers that plain CVSD files lack.

What audio quality does DVMS offer?

DVMS is optimized for voice intelligibility at low bandwidth, not music. Quality matches telephony-grade speech standards.

Can I process multiple OGG files?

Upload a batch of OGG voice recordings and encode them all to DVMS format at once.