TAK to SPH Converter

Transform TAK audio into NIST Sphere SPH online

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Research Standard

NIST Sphere is the established format for speech corpora — converting from lossless TAK gives researchers pristine audio data.

Corpus Compatible

SPH files integrate directly with Kaldi, HTK, and Praat — essential tools for speech recognition and linguistic research.

Data Protection

Your TAK uploads and SPH outputs are handled securely — source files deleted immediately, results purged within 24 hours.

How to convert TAK to SPH

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

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

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

About formats

TAK (Tom's lossless Audio Kompressor) is a high-performance lossless audio codec created by German developer Thomas Becker, with the first public release arriving in 2007. Originally called YALAC, the project was renamed before launch and quickly earned recognition for delivering compression ratios that rival or exceed FLAC while decoding noticeably faster. TAK supports PCM audio up to 24-bit depth and 192 kHz sample rate, covering everything from CD-quality to high-resolution studio masters. One of its strongest selling points is encoding speed: even at maximum compression, TAK encodes faster than most competing lossless codecs at their default settings. The decoder is similarly efficient, making real-time playback straightforward on modest hardware. Error detection through CRC-32 checksums ensures bit-perfect integrity, important for archival purposes. TAK also supports embedded cue sheets and APEv2 tags for organizing multi-track albums. The primary trade-off is that TAK remains closed-source and Windows-only, limiting cross-platform adoption. For users who prioritize compression efficiency and speed on Windows systems, TAK stands among the best lossless options available.

Developer: Thomas Becker

Initial release: 2007

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.

Developer: National Institute of Standards and Technology

Initial release: 1990

Frequently Asked Questions

What is SPH?

SPH (NIST Sphere) is an audio format developed by NIST for distributing speech corpora and linguistic research data.

Why convert TAK to SPH?

Speech research databases and linguistic projects use NIST Sphere format. Lossless TAK provides clean speech for the corpus.

What software reads SPH?

NIST Sphere tools, Praat, HTK, Kaldi, and other speech recognition frameworks handle SPH audio for linguistic analysis.

Is quality preserved?

SPH supports uncompressed PCM audio. Converting from lossless TAK preserves the full speech recording fidelity.

Is my research data secure?

TAK uploads are deleted immediately. SPH corpus files are removed from servers within 24 hours.

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TAK to M4A

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TAK to WV

TAK to AC3

TAK to AMR

TAK to M4R

TAK to WMA

TAK to DTS

TAK to OPUS

TAK to SPX

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TAK to W64

TAK to VOC

TAK to TTA

TAK to RA

TAK to MP2

TAK to OGA

TAK to PVF

TAK to PRC

TAK to MAUD

TAK to 8SVX

TAK to AMB

TAK to AU

TAK to SND

TAK to SNDR

TAK to SNDT

TAK to AVR

TAK to CVS

TAK to CVSD

TAK to CVU

TAK to DVMS

TAK to VMS

TAK to FAP

TAK to PAF

TAK to FSSD

TAK to SOU

TAK to GSRT

TAK to GSM

TAK to HCOM

TAK to HTK

TAK to IMA

TAK to IRCAM

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TAK to SPH

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TAK to SMP

TAK to TXW

TAK to VOX

TAK to WVE

TAK to SD2

Specific converters

MP3 to SPH

WAV to SPH

MP4 to SPH

ASF to SPH

FLAC to SPH

M4A to SPH

OGG to SPH

SWF to SPH

WVE to SPH

3G2 to SPH

3GP to SPH

AAF to SPH

AV1 to SPH

AVCHD to SPH

AVI to SPH

CAVS to SPH

DIVX to SPH

DV to SPH

F4V to SPH

FLV to SPH

HEVC to SPH

M2TS to SPH

M2V to SPH

M4V to SPH

MJPEG to SPH

MKV to SPH

MOD to SPH

MOV to SPH

MPEG to SPH

MPEG-2 to SPH