Dutch broadcast audio equipment company Eela Audio has made available an update to the firmware of its D3 digital console.
Version 1.05 can be downloaded for free here.
The new version brings with it a digital delay of up to 100 msec on the main outputs along with a built-in pink noise/sine wave signal generator. The sine wave generator provides a variable frequency.
There is also a modification of the overload LED to enable it to act as a signal present LED as well.