TXW to SPH Converter

Fast and easy TXW to SPH audio converter

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Private & Secure

TXW uploads are erased right after conversion to SPH completes. Converted results are automatically purged from servers within 24 hours.

Faithful Audio

Converting TXW to SPH preserves the original recording quality. Sample rates and bit depths are handled carefully during transformation.

Works Everywhere

Access the TXW to SPH converter from any device with a web browser. No platform-specific software needed to get started.

How to convert TXW to SPH

1

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

2

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

3

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

About formats

TXW is the native audio sample format of the Yamaha TX16W, a rack-mounted digital sampler released by Yamaha in 1988. Each TXW file stores a single audio sample captured by the TX16W's 12-bit analog-to-digital converters, with selectable sampling rates of 16.7 kHz, 33.3 kHz, and 50 kHz in mono. The format was engineered to work within the sampler's architecture — 1.5 MB of onboard RAM expandable via memory cards — so files are compact and structured for quick loading from 3.5-inch floppy disks. Despite its 12-bit resolution, the TX16W earned a loyal following among electronic musicians who prized its distinctive warm, slightly gritty character that imparted a recognizable sonic texture to sampled material. The format preserves loop point data and tuning metadata, enabling seamless playback of sustain loops within the hardware. While TXW files are not directly playable in most modern software, conversion utilities and the SoX audio toolkit can transform them into contemporary formats like WAV or AIFF. For vintage synth enthusiasts and sample library curators, TXW remains an important archival format.
Developer: Yamaha Corporation
Initial release: 1988
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

Frequently Asked Questions

Why convert TXW to SPH?

TXW is tied to the vintage Yamaha TX-16W hardware sampler — unusable without it. SPHERE format is used by NIST for speech research — required when working with linguistic databases and corpora.

What programs open SPH?

Open SPH with NIST SPHERE tools, SoX, or speech software. These tools handle the format natively and provide reliable playback.

Can I convert multiple TXW recordings at once?

Yes — upload several TXW files and convert them all to SPH simultaneously. Batch conversion saves significant time on collections.

Will audio quality degrade during conversion?

Quality depends on the target codec. Lossless formats keep every sample from your TXW source. Lossy codecs apply minimal compression.

Does the converter work with damaged recordings?

The converter reads whatever audio data is available in the TXW file. Severely corrupted sections may not transfer, but valid data converts.

Is my data encrypted during transfer?

All uploads and downloads use encrypted HTTPS connections. Your TXW audio and the resulting SPH output are protected throughout the process.