TTA to PVF Converter

Decode True Audio into Portable Voice Format online

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Telephony Format

PVF is used in phone systems and IVR — converting from lossless TTA produces clean voice files for telephony.

Web-Based

Create PVF files in your browser — no SoX or telephony tools needed on your machine.

Private Files

Your TTA uploads are erased after processing. PVF outputs are purged within 24 hours.

How to convert TTA to PVF

1

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

2

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

3

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

About formats

TTA (True Audio) is a real-time lossless audio compression codec developed by Aleksander Djourik, with its origins tracing back to the early 2000s. The format reconstructs the original PCM stream bit-for-bit upon decoding, guaranteeing that no sonic detail is lost during storage or transfer. TTA handles standard CD-quality audio as well as high-resolution content up to 32-bit integer samples, making it suitable for everyday listening and professional archiving alike. Processing speed is one of TTA's defining strengths — the codec achieves fast encoding and decoding without heavy CPU demands, keeping it lightweight even on older hardware. The file structure supports ID3v1, ID3v2, and APEv2 metadata tags, so track information and album art travel with the audio. Hardware support appeared in several portable players, giving TTA a practical edge over some competing lossless formats. The open-source reference implementation ships under the GNU GPL, encouraging community adoption and third-party integrations. While newer codecs like FLAC have captured a larger share of the lossless audio landscape, TTA continues to serve users who value its simplicity and transparent compression.
Developer: Aleksander Djourik
Initial release: 2003
PVF (Portable Voice Format) is a simple audio file format designed for voice message storage in Linux-based telephony systems, most notably ISDN4Linux and its vbox voicemail application. The format emerged from the European ISDN ecosystem of the late 1990s, when Linux servers increasingly handled PBX and answering machine duties over digital phone lines. PVF files store raw signed 16-bit PCM samples at 8000 Hz mono, preceded by a minimal plain-text header specifying data format and byte ordering. This deliberate simplicity is one of the format's primary strengths — with no compression and a human-readable header, PVF files are trivially easy to parse, pipe, and manipulate using standard Unix tools. The 8 kHz rate matches the Nyquist requirement for telephone-bandwidth speech (300-3400 Hz), making PVF a natural intermediate format for voice processing pipelines. Another advantage is cross-architecture portability: the explicit byte-order declaration means PVF files move between big-endian and little-endian systems without ambiguity. The SoX audio toolkit provides native PVF read/write support, enabling straightforward conversion to modern formats.
Developer: ISDN4Linux Project
Initial release: 1997

Frequently Asked Questions

What is PVF?

Portable Voice Format stores raw voice data with minimal headers — used in telephony platforms and embedded voice systems.

Why convert TTA to PVF?

Certain PBX systems and IVR platforms need PVF input. Lossless TTA provides clean voice recordings for the conversion.

What processes PVF?

SoX, Asterisk PBX, and various telephony development frameworks handle PVF audio for voice applications.

Is PVF lossy?

PVF stores uncompressed audio — converting from lossless TTA preserves full voice fidelity.

Is my data secure?

TTA uploads are deleted immediately. PVF results are removed from servers within 24 hours.