SPH to WVE Converter

Online SPH to WVE audio format conversion

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Remote Engine

The SPH to WVE conversion runs remotely in the cloud. No local resources are consumed — your device stays fast.

Private Conversion

Security matters. SPH recordings are removed once conversion finishes, and WVE files are cleared from servers within 24 hours.

Universal Tool

The SPH to WVE converter is platform-neutral. Use it on any internet-connected device with a modern web browser.

How to convert SPH 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

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
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 convert SPH to WVE?

SPH audio cannot play on Psion handheld devices. WVE is the native Psion audio format for portable device playback.

What can open WVE audio?

Open WVE with SoX or Psion handheld device audio playback and transfer tools.

What devices can I use for SPH to WVE conversion?

All devices work. Open the converter in any modern browser on a PC, Mac, Chromebook, tablet, or smartphone.

Can I change audio settings before converting SPH to WVE?

You can customize sample rate, bit depth, and channel layout in the settings panel before converting SPH to WVE.

Is SPH to WVE conversion lossless?

It depends on the target. Converting SPH to a lossless WVE format keeps all data. Lossy codecs trade minor quality for smaller size.

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

Batch conversion is available. Drop multiple SPH recordings into the converter and process them all to WVE in one pass.