CVU to WVE Converter

Change CVU audio to WVE format right in your browser

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Remote Processing

Conversion runs on our servers, not your device — so even large CVU recordings transform to WVE without slowing your machine.

Confidential Handling

Uploaded CVU recordings are erased right after conversion. WVE outputs are automatically removed from servers within 24 hours.

Format Transition

CVU is a niche legacy format with minimal support. Converting to WVE brings your audio into a format recognized by Psion devices and many other tools.

How to convert CVU to WVE

1

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

2

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

3

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

About formats

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
WVE is the audio format native to the Psion Series 3 family of personal digital assistants, released by British company Psion PLC beginning in September 1991. These clamshell PDAs included a built-in voice recorder, and all dictation functionality relied on WVE files to store captured sound. Each file begins with the ASCII signature "ALawSoundFile**" followed by a minimal header, then raw A-law encoded audio sampled at 8 kHz — a rate inherited from digital telephony standards. At 8000 bytes per second, a one-minute recording occupies just 480 KB, which was essential given that Psion devices stored data on SRAM cards typically ranging from 128 KB to 2 MB. The A-law encoding provides reasonable speech clarity within these tight storage constraints, prioritizing intelligibility over high-fidelity reproduction. WVE files can be converted to WAV or other modern formats using SoX, Awave Studio, or specialized Psion file utilities. While the format is firmly a product of early-1990s handheld computing, it holds historical significance as one of the first audio recording formats designed for pocket-sized consumer devices. Collectors and researchers studying mobile computing history occasionally encounter WVE files when recovering data from legacy SRAM media.
Developer: Psion PLC
Initial release: 1991

Frequently Asked Questions

Why should I switch from CVU to WVE?

CVU is a outdated unprocessed telephony audio format. Converting to WVE gives you Psion PDA native format.

Which software opens WVE recordings?

You can open WVE with Psion devices, SoX, and legacy PDA software.

Does CVU to WVE conversion affect quality?

Since CVU is already a low-quality telephony format, converting to WVE typically improves accessibility without meaningful further loss.

Is CVU to WVE conversion available on all platforms?

It works on any platform — desktop or mobile. Just open your browser, upload the CVU recording, and convert to WVE.

Is my CVU audio kept private during conversion?

Your uploaded CVU recordings are deleted immediately after conversion. The resulting WVE outputs are removed within 24 hours.

Do I need to install anything for CVU to WVE?

No installation required. The converter runs entirely in your web browser — just upload, convert, and download.