WV to CVU Converter

Encode WavPack audio into unfiltered CVSD voice format

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Raw Processing Input

Get unfiltered CVSD from WavPack lossless — ideal for telephony research and custom voice processing chains.

Pristine Source

WavPack lossless ensures the CVU encoder receives artifact-free audio for the best raw delta-modulated output.

Secure Handling

WV uploads are deleted immediately. CVU files are removed within 24 hours.

How to convert WV to CVU

1

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

2

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

3

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

About formats

WavPack is an open-source audio codec created by David Bryant, with version 1.0 released on August 15, 1998. What sets WavPack apart is its unique hybrid mode: the encoder can simultaneously produce a compact lossy file and a separate correction file that, when combined, reconstruct the original PCM stream bit-for-bit. Users who need portability carry just the lossy file; those who want archival quality keep both. The codec handles PCM audio from 8-bit to 32-bit integer and 32-bit floating point, with sample rates up to 768 kHz — specifications broad enough for DSD content, which WavPack 5 added support for. Compression ratios in pure lossless mode typically reach 40 to 55 percent of the original size, competitive with FLAC and often slightly better on certain material. Multicore encoding in later versions dramatically speeds up processing on modern hardware. The open-source library ships under a BSD license and has been integrated into foobar2000, VLC, FFmpeg, and numerous other tools. WavPack also supports rich metadata through APEv2 tags, embedded cue sheets, and ReplayGain values, covering the organizational needs of even the most meticulous music library.
Developer: David Bryant
Initial release: August 15, 1998
CVU is an unsigned variant of the CVS telephony audio format, differing in how delta-encoded values are represented in the binary stream. While CVS stores slope delta values as signed quantities, CVU treats them as unsigned, shifting the numerical interpretation of each sample. Both share the underlying CVSD modulation technique — 1-bit adaptive delta coding where step size varies according to recent output bit patterns — operating at comparable rates, typically 16 kbps for narrowband voice at 8 kHz. The signed-versus-unsigned distinction matters at the decoder, where correct interpretation determines proper waveform reconstruction. CVU files appear in telephony and embedded communication contexts where hardware adopted the unsigned convention. A practical advantage is straightforward interfacing with systems using unsigned arithmetic natively, avoiding sign extension in decoders. Like its signed counterpart, CVU achieves extreme bandwidth efficiency, compressing voice into compact bitstreams for constrained links. SoX supports CVU, providing a reliable path for converting these niche telephony recordings into modern formats for analysis or archival.
Developer: CCITT / ITU-T
Initial release: 1970

Frequently Asked Questions

Why convert WV to CVU?

CVU provides unfiltered CVSD audio — ideal for processing pipelines that apply their own filtering to raw delta-modulated data.

How is CVU different from CVSD?

CVU skips post-processing filters. The raw delta-modulated signal is delivered for downstream custom filtering.

What uses CVU?

Telephony research systems and speech processing platforms that need unprocessed CVSD input.

Is it for casual listening?

No — CVU is designed for technical processing, not direct playback. Convert to WAV for listening.

Is it free?

Yes — free on convertio.tools.