MKV to SLN Converter
Extract signed linear audio from MKV for Asterisk PBX
Asterisk Native
SLN is what Asterisk PBX expects natively. Extract MKV audio directly into the format your phone system uses for prompts and music.
Custom PBX Audio
Turn any video audio into custom hold music, IVR prompts, or greetings for your Asterisk PBX. No telephony tools needed for conversion.
Cloud Extraction
All processing runs on convertio.tools. No Asterisk server access needed for the conversion — upload MKV and download SLN.
How to convert MKV to SLN
Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.
Choose sln or any other format you need as a result (more than 200 formats supported)
Let the file convert and you can download your sln file right afterwards
About formats
Frequently Asked Questions
SLN is Asterisk PBX's native audio format — raw signed linear PCM. Required for custom prompts, hold music, and IVR recordings on Asterisk.
Asterisk, FreePBX, and compatible VoIP PBX systems use SLN for playback. It is the default format for Asterisk sound files.
Standard Asterisk uses 8 kHz mono SLN. Wideband configurations use 16 kHz. Match your output to your PBX configuration.
No — SLN is raw, uncompressed signed linear PCM. Files are straightforward but larger than compressed telephony formats like GSM.
Yes — extract the audio, and the SLN file can serve directly as an IVR prompt or on-hold recording in your Asterisk PBX system.