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The Jamulus software enables musicians to perform real-time jam sessions over the internet. There is a Jamulus server which collects the audio data from each Jamulus client, mixes the audio data and sends the mix back to each client.
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README.md

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Jamulus - Internet Jam Session Software

Jamulus icon

The Jamulus software enables musicians to perform real-time jam sessions over the internet. There is one server running the Jamulus server software which collects the audio data from each Jamulus client, mixes the audio data and sends the mix back to each client.

Jamulus is Open Source software (GPL, GNU General Public License) and runs under Windows (ASIO), MacOS (Core Audio) and Linux (Jack). It is based on the Qt framework and uses the OPUS audio codec.

The source code is hosted at Sourceforge.net. Sourceforge logo

Required Hardware Setup

The required minimum internet connection speed is 200 kbps for the up- and downstream. The ping time (i.e. round trip delay) from your computer to the server should not exceed 40 ms average.

For the Jamulus software to run stable it is recommended to use a PC with at least 1.5 GHz CPU frequency.

On a Windows operating system it is recommended to use a sound card with a native ASIO driver. This ensures to get the lowest possible latencies.

Windows Download and Installation

Download a Windows installer at the Sourceforge.net download page

The Jamulus software requires an ASIO sound card driver to be available in the system. If your sound card does not have native ASIO support, you can try out the following alternative: ASIO4ALL - Universal ASIO Driver For WDM Audio

The ASIO buffer size should be selected as low as possible to get the minimum audio latency (a good choice is 128 samples).

Compilation and Development

See the Compile Instructions file.

Acknowledgments

This code contains open source code from different sources. The developer(s) want to thank the developer of this code for making their efforts available under open source: