CVS to WVE Converter

Switch from CVS to WVE with a browser-based converter

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No Local Load

Server-based processing keeps your device fast. CVS to WVE conversion is handled by our infrastructure, not local hardware.

Effortless Conversion

The entire CVS to WVE process is designed for simplicity. Drag your audio in, pick the format, and grab the output.

Modern Format

CVS recordings become far more usable as WVE. The conversion unlocks A-law encoded voice that CVS cannot provide.

How to convert CVS 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

CVS is a telephony audio encoding based on Continuously Variable Slope Delta modulation, representing voice through a 1-bit delta scheme where step size adapts to track input amplitude. Developed within CCITT (now ITU-T) standards during the 1970s, CVS encodes by comparing each sample to the previous one and outputting a single bit — up or down — with slope magnitude adjusting based on recent bit patterns. This yields extremely low bit rates, typically 16 kbps at 8 kHz sampling, efficient for narrowband voice over constrained channels. CVS files store signed delta-encoded data and are commonly processed using tools like SoX. A significant advantage is bandwidth economy: the 1-bit-per-sample approach demands minimal transmission capacity, essential for military radio links and early digital telephone infrastructure. The adaptive slope mechanism also prevents overload distortion on rapidly changing signals while keeping granular noise acceptable during quiet passages. Though modern wideband codecs have superseded CVS, it retains historical importance and niche utility in legacy telephony and embedded communication devices.
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 CVS to WVE?

CVS suffers from obsolete encoding that limits playback options. WVE offers compact handheld recordings.

Which software opens WVE recordings?

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

Is there quality loss from CVS to WVE?

The source CVS audio has inherently low fidelity. WVE conversion preserves what is there while adding broad compatibility.

Is CVS to WVE conversion available on all platforms?

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

Is my CVS audio kept private during conversion?

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

Do I need to install anything for CVS to WVE?

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