VQF to DVMS Converter

Decode TwinVQ VQF into DVMS voicemail online

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Format Rescue

Decode dead TwinVQ audio into functional DVMS — rescue your files before VQF decoders become completely unavailable.

Online Decoding

No abandoned TwinVQ player software needed — our servers decode VQF and encode DVMS through your browser.

Secure Processing

VQF uploads are erased immediately. DVMS outputs are purged from servers within 24 hours.

How to convert VQF 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

VQF is the file extension for audio encoded with TwinVQ (Transform-domain Weighted Interleave Vector Quantization), a lossy compression technology developed by NTT (Nippon Telegraph and Telephone) in 1994 and later commercialized by Yamaha under the SoundVQ brand. The codec claimed a 30 to 35 percent size advantage over MP3 at equivalent perceptual quality — a 96 kbps VQF file was said to match a 128 kbps MP3 — generating considerable excitement during the late-1990s format wars. TwinVQ supports constant bitrate encoding at 80, 96, 112, 128, 160, and 192 kbps, and the underlying algorithm was incorporated into the MPEG-4 Audio standard (ISO/IEC 14496-3) as one of its defined object types. Despite strong technical merits, VQF never achieved widespread adoption: encoding was slow compared to MP3, hardware player support was scarce, and the proprietary licensing discouraged third-party development. In 2009, the FFmpeg project reverse-engineered the TwinVQ decoder, bringing playback support to VLC and other open-source players. VQF stands as a notable case study in codec history — technically ambitious yet eclipsed by MP3's ecosystem momentum and the later rise of AAC.
Initial release: 1996
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

What is DVMS?

DVMS is a specialized audio format — a digital voice messaging format for PBX systems.

Why convert VQF to DVMS?

VQF is a dead format with no player support. Converting to DVMS rescues your audio for specific applications that need this format.

What handles DVMS?

Specialized tools, SoX, and targeted professional software support DVMS audio processing and playback.

Is there quality loss?

VQF is lossy — the original quality loss is permanent. The DVMS output preserves whatever quality the VQF file contained.

Is the conversion secure?

VQF uploads are deleted immediately after conversion. DVMS results are removed from servers within 24 hours.