CVU to PAF Converter

Switch from CVU to PAF with a browser-based converter

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Effortless Conversion

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

Modern Format

CVU recordings become far more usable as PAF. The conversion unlocks big-endian audio data that CVU cannot provide.

Nothing to Install

Skip the software installations. This browser-based tool handles CVU to PAF conversion entirely online, from any modern browser.

How to convert CVU to PAF

1

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

2

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

3

Let the file convert and you can download your paf 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
PAF (Paris Audio File) is the native audio format of the Ensoniq PARIS (Professional Audio Recording Integrated System) digital audio workstation, developed by Ensoniq in the late 1990s. PARIS was a hardware/software DAW that earned a loyal following among recording engineers for its warm analog-like sound and reliable operation, with PAF serving as its primary working file container. The format stores uncompressed PCM audio at 16-bit or 24-bit resolution and standard professional sample rates (44.1, 48, and 96 kHz), preserving full fidelity without lossy compression. PAF uses a straightforward binary layout — a compact header followed by interleaved sample data — enabling efficient real-time read and write during recording sessions. One notable advantage is support for both big-endian and little-endian byte ordering, reflecting the PARIS system's cross-platform roots on Mac and PC. After Ensoniq's acquisition by E-mu Systems and then Creative Technology, the PARIS DAW was discontinued, but PAF files remain important for studios with archived projects in this format. Tools like SoX and libsndfile can read and convert PAF files, ensuring long-term accessibility.
Developer: Ensoniq
Initial release: 1998

Frequently Asked Questions

What makes PAF a better choice than CVU?

CVU suffers from outdated unprocessed telephony audio format. PAF offers legacy professional audio.

What can I use to play PAF?

You can open PAF with Ensoniq PARIS workstation and SoX.

Is there quality loss from CVU to PAF?

No quality is lost. PAF stores audio without additional compression, so your CVU recording carries over at full original fidelity.

Can I do this conversion from my phone?

Yes. The online converter is platform-independent — use it from any computer, tablet, or smartphone with a web browser.

Are there limits on CVU to PAF conversion?

Standard conversions work without restrictions for typical use. Premium plans provide additional speed and capacity for large workloads.

Is registration needed for this conversion?

No account is needed for standard conversions. Simply upload your CVU recording, choose PAF, and download the result.