Rocket Streaming Audio Server is a high-performance webserver for delivering live streaming audio over HTTP(S) and HLS. It is a modern replacement for Icecast and SHOUTcast, designed to deliver broadcast-grade live audio at scale.
Download Free Edition
Read the Docs
For Linux and Windows 7 or later.
| 2024-12-19 | RSAS 1.0.7 Released | RSAS 1.0.7 includes a couple of major bugfixes and is a recommended update for all users. ARM64 and more Raspberry Pi models are now supported too. |
| 2024-11-27 | RSAS 1.0.6 Released | RSAS 1.0.6 includes improved bitrate auto-detection, experimental Raspberry Pi support, HLS improvements, AlmaLinux 9 support, and several bugfixes. |
| 2024-04-09 | RSAS 1.0.5 Released | RSAS 1.0.5 includes an overhauled Looped Audio Files feature, improved HLS support, optimizations, and several bugfixes. |
| See all news | ||
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 at scale.
| Free | Pro | Pro with Enterprise Support | |
|---|---|---|---|
| Features | |||
|
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 | Unlimited |
| Instances per physical server | 1 | 1 per license seat | Site licensing available |
| Licensing and deployment scope | One installation for personal use or evaluation | One station or organization |
Multiple customer deployments, managed hosting, and network-wide licensing Suitable for system integrators and IT companies |
|
Software Bill of Materials (SBOM) EU Cyber Resiliency Act Compliance |
Not included | Not included | SBOM available on request |
| Support & Services | |||
| Technical support | Documentation | Direct support from experienced, human software developers | |
| Scaling and capacity planning | Self-service | Self-service | Architecture and capacity planning with our engineers |
| Deployment and integration assistance | Not included | Documentation | Hands-on assistance with deployment, configuration, and integration |
| Support response commitments | None | Best effort | Guaranteed response times under a custom SLA |
| Priority incident escalation | Not included | Not included | Priority escalation path for production issues |
| Security updates and advisories | Public releases | Standard release notifications | Advance notice for security updates and coordinated remediation |
| Architecture guidance | Not included | Not included | Expert architecture reviews and solution design advice |
| Onboarding and knowledge transfer | Self-service | Documentation | Guided onboarding, technical walkthroughs, and team training |
| Upgrade planning | Self-service | Documentation | Upgrade planning and release transition guidance |
| Roadmap collaboration | Not included | Not included | Direct feedback channel and roadmap discussions |
| Commercial flexibility | Standard terms | Standard terms | Custom licensing, invoicing, and terms |
| Pricing | |||
| Free Download | Contact Us | Talk to an Expert | |
Free for up to 100 concurrent listeners.
Rocket Streaming Audio Server (RSAS) is self-hosted webserver software for delivering live internet radio and other streaming audio over HTTP(S) and HLS. It runs on Windows and Linux and supports MP3, AAC, AAC+, Opus, Ogg Vorbis, Ogg FLAC, and FLAC.
Yes. RSAS is designed as a drop-in Icecast replacement and can work with existing Icecast configuration files, encoders, automation systems, and log-processing workflows.
The Free Edition supports up to 100 concurrent listeners. The Pro Edition has no listener limit, and is only limited by your server hardware and bandwidth.
Yes. RSAS supports HLS audio, for playback on mobile devices and Wi-Fi networks. RSAS dynamically repackages your traditional Icecast-style stream into HLS, so no special encoder is needed.
RSAS can provide end-to-end latency as low as four seconds for HTTP streams, with only 100ms of that being internal. Actual latency depends on the encoder, stream configuration, player buffering, network conditions, and protocol.