AAC to DVMS Converter

Convert AAC audio to DVMS voice format online

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Voicemail Compatibility

Convert AAC audio to DVMS format for legacy voicemail and voice messaging system compatibility.

Simple Process

Upload your AAC file, select DVMS, download — no legacy voice system software needed for the conversion.

Private Conversion

AAC files are removed right after processing. DVMS outputs are deleted within 24 hours.

How to convert AAC 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

AAC (Advanced Audio Coding) is the successor to MP3, standardized by ISO/IEC as part of the MPEG-2 and later MPEG-4 specifications. Designed collaboratively by Fraunhofer, Dolby, Sony, Nokia, and AT&T, AAC delivers superior sound quality at equivalent or lower bit rates — a 96 kbps AAC stream generally matches a 128 kbps MP3 file in perceptual quality. The codec leverages a modified discrete cosine transform combined with advanced psychoacoustic modeling and temporal noise shaping. AAC serves as the default audio format for Apple's ecosystem (iTunes, iPhone, iPad), YouTube, and many streaming services. Its first advantage is excellent compression efficiency — high-fidelity audio using significantly less storage and bandwidth. Second, the format supports sample rates from 8 kHz to 96 kHz and up to 48 channels, suiting everything from voice calls to surround sound. Third, broad industry adoption by Apple and others ensures that virtually every modern device, browser, and media player handles AAC content natively without additional plugins.
Initial release: 1997
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 AAC to DVMS?

DVMS is used in certain legacy voicemail and voice messaging systems — needed when your platform specifically requires this encoding.

What handles DVMS files?

SoX and legacy voicemail systems that support the DVMS format can read and process these files.

Is DVMS a modern format?

No — DVMS is a legacy voice format. Modern voicemail systems typically use more common codecs.

What quality does DVMS provide?

DVMS is designed for voice messages — audio quality is adequate for speech but not suitable for music.

Can I convert several files at once?

Upload a batch of AAC files and convert them all to DVMS simultaneously.

AAC to DVMS Quality Rating

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