WAV to SLN Converter
Create Asterisk PBX signed linear audio from WAV
PBX-Ready Format
Produce SLN files that Asterisk PBX reads natively — drop them into the sounds directory and they work immediately.
Bulk Conversion
Convert an entire library of WAV prompts to SLN simultaneously — set up your phone system audio in one workflow.
No CLI Tools Needed
Convert WAV to SLN in the cloud — skip installing SoX on your PBX server just for audio format conversion.
How to convert WAV 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
Asterisk PBX uses raw signed linear PCM as its native audio format. Phone prompts and hold music must be in SLN for direct Asterisk playback.
Asterisk, FreePBX, and compatible VoIP platforms consume SLN files directly as system sounds, prompts, and music-on-hold.
Standard Asterisk uses 8 kHz mono (sln). Wideband extensions use 16 kHz (sln16). Match your system dialplan configuration.
Yes — SLN is headerless raw signed linear PCM data. No container overhead means zero decoding latency for the PBX.
Upload all your WAV prompts and convert them to SLN at once — deploy a complete set of PBX audio files in one session.