Sample Rates
Rivendell Audio Sample Rate Recommendations
The most common and recommended sample rates for the Rivendell Radio Automation System are:
| Sample Rate | Recommended Use | Notes |
|---|---|---|
| 44.1 kHz | Traditional music/CD workflow | Best when the majority of source audio comes from CD rips |
| 48 kHz | Modern broadcast and streaming | Preferred for FM, streaming, JACK/PipeWire, and modern processing chains |
Rivendell supports multiple PCM sample rates, but the most important rule is consistency across the entire audio chain.
Keep the Entire Audio Chain Matched
All major components should run at the same sample rate:
- Audio Interface
- JACK / PipeWire
- Rivendell Audio Store
- GlassCoder & GlassGUI / BUTT / DarkIce / Liquidsoap
- Stereo Tool
- Streaming Encoder
Recommended Setups
Modern FM / Streaming Station
Recommended Format
- 48 kHz
- 16-bit or 24-bit PCM
Why 48 kHz?
- Native rate for most broadcast hardware
- Matches AAC, Opus, and modern streaming pipelines
- Avoids unnecessary resampling in JACK/PipeWire workflows
- Better compatibility with video and social media content
- Preferred by most modern audio processors
Legacy Music Library / CD-Focused Workflow
Recommended Format
- 44.1 kHz
Best suited when the majority of source material originates from audio CDs.
This minimizes resampling during import, although modern broadcast chains generally benefit more from maintaining 48 kHz consistency end-to-end.
What NOT To Use
Avoid using the following sample rates for normal radio operations:
- 96 kHz
- 192 kHz
These dramatically increase:
- CPU usage
- JACK/PipeWire overhead
- Storage requirements
- Network bandwidth usage
...while providing essentially no listener benefit for radio broadcast or streaming applications.
Best Practices for Rivendell Systems
A stable modern Rivendell broadcast chain typically uses:
| Component | Recommended Sample Rate |
|---|---|
| Rivendell Audio Store | 48 kHz |
| JACK / PipeWire | 48 kHz |
| Stereo Tool | 48 kHz |
| Liquidsoap Internal Processing | 48 kHz |
| Streaming Encoder Input | 48 kHz |
| Final MP3/AAC Stream | 44.1 kHz or 48 kHz |
Benefits of Keeping Everything at 48 kHz
For most modern broadcast and streaming systems, maintaining a consistent 48 kHz workflow minimizes:
- XRUNs
- Resampler artifacts
- Clock drift
- Unnecessary FFmpeg processing
- CPU overhead
This results in a cleaner, more stable, and lower-latency audio chain.