“The stream freezes”, “the sound comes and goes”, “it keeps loading”: most listener complaints point to the same problem, buffering. In this post we explain what buffering is, its causes and how to tell whether the problem is yours or the listener’s.
What is buffering?
Buffering is a temporary stop or stall in the audio stream of a radio broadcast. When data cannot reach the listener fast enough, the player pauses to refill its buffer before the sound runs out.
What causes buffering?
- The listener’s internet connection is weak. Especially on mobile and crowded Wi-Fi networks.
- Server bandwidth is full. When capacity is insufficient, all listeners are affected.
- The bitrate is higher than needed. A 320 kbps stream stalls on a weak connection.
- The listener limit is exceeded. You can find how to calculate capacity in the concurrent listeners post.
- Server or network delays.
- The encoder side. A weak connection or wrong buffer setting in a live show; see encoder buffer and latency.
Why is buffering serious for radio?
- It spoils the listener experience.
- It lowers the professional impression of the stream.
- It causes listener loss.
- It affects mobile listeners directly, and a large share of radio listeners are on phones.
Server side or listener side?
| Symptom | Most likely cause |
|---|---|
| Many listeners complain at once | The server or broadcast side |
| Only one or two listeners are affected | The listener’s internet or device |
| It happens only in live shows, not on AutoDJ | The encoder connection or buffer |
| It happens only at certain hours | Load, capacity |
Fix steps
- Listen yourself first. Listen to the same stream over a different connection (for example mobile data).
- Review the bitrate. For talk streams 64 or 96 kbps may be enough.
- Offer a lower-bitrate alternative. A second, lower-quality stream helps mobile listeners.
- Check capacity. Are the listener limit and bandwidth unlimited? That is why unlimited-listener radio hosting makes a difference.
- Raise the buffer in live shows. On an unstable connection, go up one step.
- Watch the statistics. Follow server performance and listener count regularly.
Common mistakes
- Broadcasting at a higher bitrate than needed.
- Constantly pushing the listener limit.
- Not considering mobile users.
- Never watching server statistics.
Conclusion
Buffering is the clearest indicator of performance and capacity management in radio infrastructure. The right bitrate, enough capacity and a stable live connection solve most of the problem. If you want to review your broadcast infrastructure, see our radio hosting plans or write to us.