The default server config file should work for most people using OSS or ALSA with OSS emulation. Nevertheless, many will want to edit the file to tune device options, select default devices, or enable native ALSA support. If server is run as root, change to this user and group for safety. This causes the GdasExternal class to renice the child process the specified number of steps. If you hear static, try this option.
Larger sizes increase latency but protect against dropout.
Larger numbers increase latency but protect against dropout.