> For the complete documentation index, see [llms.txt](https://docs.radioangrezi.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.radioangrezi.de/tech-deep-dive/services/vu-meter.md).

# VU-Meter

To level the audio going to the stream is still a challenge, especially broadcasting from home. You can now find a little helper, an online level meter for the output stream, here:

<http://studio.radioangrezi.de/vu-meter/>

Please note:

1. This VU-meter is downloading the stream and will process it locally in your browser. This means it will use some bandwidth. (This is why I have set the 64kbit “low” stream as a default value.)
2. There is some obvious time delay from you -> server -> transmission -> your computer -> level meter -> processing / calculation.
3. dB-meters are not the only, and definitely not the best way to measure “loudness”.

Source(s):

* <https://p-node.org/documentation/streams/stream-vu-meter>
* <https://github.com/mmckegg/audio-rms>

#### vu-meter

|             |                                                                                        |
| ----------- | -------------------------------------------------------------------------------------- |
| Description | A javascript web client downloading the http icecast stream and calculating the level. |
| Repository  | none                                                                                   |
| Directory   | `/var/www/vu-meter`                                                                    |
| .conf       | `/etc/apache2/sites-enabled/angrezi-libretime_and_controller.conf`                     |
| Exposed at  | <http://studio.radioangrezi.de/vu-meter/>                                              |