Rocket Streaming Audio Server broadcasts live audio over HTTP(S), and is a modern replacement for Icecast and SHOUTcast.
Download for Free
Read the Docs
For Linux and Windows 7 or later.
NEW RSAS 1.0 Released! Find out what's new.
RSAS is a drop-in replacement for Icecast, and works with your existing Icecast config file, encoder, automation, and log processing,
making upgrading as easy as possible.
Read more about migrating from Icecast to RSAS.
With end-to-end latency as low as 4 seconds, RSAS keeps your live broadcast live. Competing streaming audio servers can add 30 seconds or more of delay to your stream, leaving your listeners lagging behind.
Our high performance streaming engine was designed from the ground up to deliver audio reliably
with minimal CPU and memory usage. RSAS can scale up to 1 million listeners on a single server.
Read more about RSAS performance and scalability.
RSAS fully supports streaming MP3, AAC, AAC+, Ogg Vorbis, Opus, and lossless Ogg FLAC.
Includes in-stream icy-metadata support for all codecs, so your metadata appears
in most players.
No more guesswork about what's supported and what's not - It's all in the docs!
Unlike other streaming servers, relaying streams through RSAS doesn't add excessive latency, making it suitable for streaming audio CDNs.
Automatically feed your listeners another stream if a source drops, and switch them back if it reconnects.
Stream an emergency backup file to your listeners if a source drops, to keep your listeners connected.
RSAS for Windows saves you time with an easy-to-use interface for configuration and monitoring. No more fiddling with config files. Get your streams configured with just a few clicks.
Built from scratch as an Icecast alternative, RSAS offers better stability, HLS support, in-stream metadata for Ogg FLAC, reliable on-demand relaying, seamless fallback transitions that don't kick listeners, and official support for MP3 and the AAC family of codecs.
RSAS is a modern alternative to SHOUTcast. Some of the advantages of RSAS over SHOUTcast are AAC and AAC+ support (even in the Free Edition), HTTPS / TLS, HLS, no bitrate restrictions, better compatibility with players, better scalability, and better support.
RSAS is built for professionals who need the very best reliability and performance in delivering their streaming audio.
RSAS powers the Radio Mast Streaming Network, a global streaming audio CDN with points of presence spanning three continents and dozens of servers.
Broadcast your radio station to listeners over the web with RSAS. Connect with an Icecast-compatible streaming audio encoder like Rocket Broadcaster, and include realtime Now Playing metadata in your stream. Listen from iOS, Android, desktop PCs, web browsers, smart speakers, and more.
Deliver low-latency audio from your event to a global audience. With delay as low as 4 seconds, interactivity like live Q&A is possible like never before.
Expand your podcast with a live edition. RSAS serves your live streaming audio to an audience of any size.
| Free | Pro | |
|---|---|---|
|
Stream all major codecs
MP3, AAC, AAC+, Ogg Opus, Ogg Vorbis, and Ogg FLAC |
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| Low latency | ||
| HLS | ||
| Max simultaneous listeners | 100 | Unlimited |
| Instances per physical server | 1 | 1 per license seat |
| Priority support | ||
| Free Download | Learn More |
Free for up to 100 concurrent listeners.