TAK to SLN Converter

Encode TAK audio as raw SLN telephony format online

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PBX Ready

SLN is the native format for Asterisk PBX — converting from lossless TAK produces crystal-clear telephony prompts.

Sample Rate Control

Set the exact SLN sample rate your PBX needs — 8 kHz narrowband or 16 kHz wideband from lossless TAK source.

Secure Handling

Uploaded TAK files are erased immediately. SLN telephony audio is purged from servers within 24 hours.

How to convert TAK to SLN

1

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

2

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

3

Let the file convert and you can download your sln 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
SLN (Signed Linear) is a headerless raw audio format storing 16-bit signed linear PCM samples at 8000 Hz mono, most closely associated with Asterisk) — the open-source PBX framework developed by Digium (now Sangoma Technologies). Within Asterisk, SLN serves as the native internal audio representation: every codec transcoding operation passes through signed linear as an intermediate step. This makes SLN the backbone of Asterisk's codec translation architecture. The format contains nothing but raw samples — no headers, no metadata, no framing — so parameters must be known in advance. While this lack of self-description might seem limiting, it is actually an advantage in telephony where sample format is fixed by convention and every overhead byte matters across thousands of simultaneous channels. The 8000 Hz rate aligns with the G.711 standard for traditional telephony, capturing the full 300-3400 Hz voice band. Asterisk also supports extended variants (sln16, sln32, sln48) for wideband audio. SLN files require no decoding — just direct memory mapping — making them ideal for real-time mixing, conferencing, and prompt playback in high-density VoIP environments.
Initial release: 1999

Frequently Asked Questions

What is SLN?

SLN (Signed Linear) is raw PCM audio without headers — the native audio format for Asterisk PBX telephony servers.

Why convert TAK to SLN?

Asterisk PBX systems use SLN for prompts, hold music, and IVR audio. Converting from lossless TAK gives you clean telephony audio.

What uses SLN files?

Asterisk PBX, FreeSWITCH, and other open-source telephony platforms use SLN as their internal audio format.

What sample rate should I use?

Asterisk standard is 8 kHz for narrowband or 16 kHz for wideband. Check your PBX configuration for the correct rate.

Is the conversion secure?

TAK uploads are deleted immediately. SLN outputs are removed from servers within 24 hours.