WAV to CVU Converter

Produce unfiltered CVSD audio data from WAV files

Drop files here. 1 GB maximum file size or Sign Up
to
Facebook Amazon Microsoft Tesla Nestle Walmart L'Oreal

Raw Delta Modulation

Generate unfiltered CVSD data from WAV — for communication hardware that requires the specific CVU variant.

Cloud Processing

All encoding runs on our servers. No DSP tools or modulation software needed on your machine.

Secure Handling

WAV uploads are erased after processing. CVU outputs are deleted within 24 hours.

How to convert WAV 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

WAV (Waveform Audio File Format) is an uncompressed audio container jointly developed by Microsoft and IBM, first published in August 1991 alongside Windows 3.1. Built on the Resource Interchange File Format (RIFF), WAV stores audio data — most commonly as linear pulse-code modulation (LPCM) — together with metadata describing sample rate, bit depth, and channel count. This straightforward structure has made WAV the de facto standard for uncompressed audio on Windows and a universally accepted interchange format across virtually every operating system, audio editor, and media player in existence. CD-quality WAV files use 16-bit samples at 44.1 kHz stereo, while professional workflows routinely employ 24-bit or 32-bit float samples at rates up to 192 kHz. A major advantage is zero-loss fidelity: because standard WAV applies no compression, the stored data is an exact digital representation of the original recording, making it the preferred choice for mastering and archiving. WAV also supports embedded metadata through INFO and BWF chunks, enabling timestamping and production notes. The main trade-off is file size — one minute of CD-quality stereo occupies roughly 10 MB — and the 32-bit RIFF structure imposes a 4 GB limit, though RF64 removes that ceiling.
Developer: Microsoft and IBM
Initial release: August 1991
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 WAV to CVU?

CVU is the unfiltered variant of CVSD modulation. Certain communication hardware and audio testing systems require raw delta-modulated data without filtering.

What uses CVU files?

Specialized communication equipment and audio test benches that need unfiltered CVSD data for calibration or transmission.

How is CVU different from CVSD?

CVU omits the output filtering stage present in standard CVSD. This produces rawer audio data needed by specific hardware interfaces.

Is CVU a general-purpose format?

No — CVU is extremely niche. It appears only in specialized military, communication, and audio testing contexts.

Can I batch-convert files?

Yes. Upload multiple WAV files and produce CVU output for all of them simultaneously.

WAV to CVU Quality Rating

3.8 (3 votes)
You need to convert and download at least 1 file to provide feedback!