DVMS to SND Converter

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Multiple at Once

Handle multiple DVMS to SND conversions at once. Upload your batch and let the converter process them in parallel.

Format Transition

DVMS recordings become far more usable as SND. The conversion unlocks simple structure that DVMS cannot provide.

Quick Turnaround

Speed matters. Our converter transforms DVMS to SND in moments, so you get your audio in the right format without waiting.

How to convert DVMS to SND

1

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

2

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

3

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

About formats

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
SND is a multi-platform audio file extension used across several computing ecosystems since the late 1980s. On Sun and NeXT workstations, .snd files follow the AU format structure — a header with magic number 0x2e736e64, data offset, encoding type, sample rate, and channel count, followed by raw audio. On MS-DOS PCs, the same .snd extension was used by early sound utilities like Sounder and SoundTool for simple 8-bit unsigned PCM recordings. Macintosh systems also employed .snd for sound resources embedded in the resource fork. Because the extension is shared across incompatible formats, audio processing tools typically inspect the file header to determine which variant they are handling: files beginning with the AU magic number are treated as Sun/NeXT audio, while headerless files are interpreted as raw PCM with assumed parameters. The Sun/NeXT variant supports multiple encodings including mu-law, A-law, 8-bit and 16-bit linear PCM, and ADPCM, making it versatile for both speech and general audio. One advantage of the AU-style SND is its self-describing header, which enables any compliant player to determine sample format and rate without external metadata. The MS-DOS SND variants hold historical value as artifacts of the era when Sound Blaster cards first brought digital audio to personal computers. SND files from all platforms can be processed and converted using SoX and other audio tools.
Initial release: 1988

Frequently Asked Questions

What is the benefit of converting DVMS to SND?

DVMS suffers from German telephony format not recognized by standard media players. SND offers historical computing interest.

What programs can play SND?

You can open SND with SoX, Audacity, and vintage DOS audio tools.

Is there quality loss from DVMS to SND?

No quality is lost. SND stores audio without additional compression, so your DVMS recording carries over at full original fidelity.

Does this converter work on mobile devices?

Absolutely. Since conversion happens in the browser, any device with internet access and a modern browser will work.

How long does DVMS to SND conversion take?

Most conversions finish within seconds. Processing time depends on recording length, but the cloud-based engine handles it quickly.

What if my DVMS recording is very long?

The converter handles recordings of various lengths. For very large or numerous files, premium plans provide extended capacity.