SPH to PAF Converter

Smooth SPH to PAF transcoding in your browser

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Confidential Handling

Your SPH audio is deleted as soon as the conversion ends. The PAF output is automatically purged within 24 hours.

Accurate Conversion

Expect high-fidelity SPH to PAF results. The converter processes audio data carefully to deliver accurate, distortion-free output.

Quick Delivery

Rapid SPH to PAF processing. Upload your SPHERE recording and have the converted output ready almost immediately.

How to convert SPH 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

SPH is the file extension for audio stored in the NIST SPHERE (SPeech HEader REsources) format, a standard created by the U.S. National Institute of Standards and Technology around 1990. Built for speech research, SPH files carry a 1024-byte ASCII header packed with metadata — database identifiers, channel counts, sample rates, byte ordering, and compression type — making every recording self-describing. The underlying audio is typically 16-bit linear PCM sampled at 16 kHz, though other configurations are permitted. Researchers at NIST, DARPA, and universities worldwide rely on SPH for distributing speech corpora such as TIMIT, Switchboard, and the LDC collections that underpin modern automatic speech recognition systems. A key advantage is that the human-readable header lets scripts parse recording metadata without binary decoding. The format's strict standardization also eliminates ambiguity when sharing datasets across institutions and platforms. Because SPH files store uncompressed PCM, they preserve full audio fidelity — critical when training acoustic models where even small artifacts can skew results.
Initial release: 1990
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

Why convert SPH to PAF?

SPH data cannot be imported into PARIS projects. PAF is the required container format for Ensoniq PARIS digital audio work.

What can open PAF audio?

Open PAF with SoX or PARIS digital audio workstation recording environments.

What devices can I use for SPH to PAF conversion?

No device restrictions. The SPH to PAF converter works in Chrome, Firefox, Safari, Edge, or any standards-compliant browser.

Can I change audio settings before converting SPH to PAF?

Yes — you can modify sample rate, bit depth, and channel settings before starting the SPH to PAF conversion.

Is SPH to PAF conversion lossless?

For lossless targets like WAV or FLAC, yes. For lossy PAF, the codec applies compression but quality remains high at decent bitrates.

Can I convert many SPH files to PAF in one batch?

You can process multiple SPH to PAF conversions together. Upload all files, select the target, and convert in one batch.