MXF to SLN Converter

Extract Asterisk SLN audio from MXF video files

Drop files here. 1 GB maximum file size or Sign Up
to
Facebook Amazon Microsoft Tesla Nestle Walmart L'Oreal

Asterisk Native

SLN plugs directly into Asterisk PBX. Extract MXF audio for phone system prompts and messages.

VoIP Ready

SLN from MXF feeds into VoIP phone systems — create custom voice content for business telephony.

Cloud Processing

SLN extraction from MXF runs on our servers — no Asterisk installation needed for conversion.

How to convert MXF 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

MXF (Material Exchange Format) is a professional media container standardized by the Society of Motion Picture and Television Engineers (SMPTE) in 2004 under the SMPTE 377M specification. Designed for the broadcast and post-production industries, MXF provides a vendor-neutral wrapper for carrying video, audio, and rich descriptive metadata between different production systems and platforms. The format supports a wide range of professional codecs including MPEG-2, AVC-Intra, DNxHD, DNxHR, ProRes, and JPEG 2000, making it adaptable to various quality tiers from proxy editing to master-quality archive. An extensive metadata framework is one of the defining characteristics of MXF, carrying production information such as timecodes, clip names, descriptive markers, source references, and technical parameters within a structured Key-Length-Value (KLV) encoding scheme. This metadata travels with the content through the production chain, reducing the risk of information loss when files move between ingest, editing, graphics, playout, and archive systems. MXF files use an operational pattern system that defines different levels of complexity, from simple single-item packages (OP1a) to complex multi-item playlists. Major broadcast equipment manufacturers and file-based workflow systems universally support MXF, and it serves as the interchange format for standards like AS-02 and AS-11 used in broadcasting.
Initial release: 2004
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

Why convert MXF to SLN?

SLN is the native audio format for Asterisk PBX — needed for custom prompts, hold music, and IVR messages.

What uses SLN files?

Asterisk PBX servers use SLN for voice prompts, auto-attendant greetings, and on-hold music playback.

What is Asterisk PBX?

Asterisk is the most widely used open-source phone system. SLN is its raw audio format for telephony content.

What sample rate does SLN use?

Asterisk SLN typically uses 8000 Hz for standard telephony or 16000 Hz for wideband voice quality.

Can I batch convert?

Upload multiple MXF files and extract SLN audio from each simultaneously for PBX system deployment.