The meter covers the range -50dBFS to 0dBFS, i.e. maximum permissible level at full scale (far right) down to 50dB below that at far left. The green bar covers the range -50dBFS to -10dBFS. The yellow bar covers the range -10dBFS to -3dBFS. The red bar covers the range -3dBFS to 0dBFS. There are independent meters for left and right channels which monitor the system output, i.e. the mix of audio that feeds the Zynthian output. (There is the ability to change what is monitored using the audio routing features of Zynthian.) Level decays with a logarithmic rule, taking one second to decay to -200dBFS so will decay to -50dBFS (the displayed range) in about quarter of a second. Peaks are displayed instantly, i.e. the attack of the meter is immediate*. The peak hold bar remains for two seconds or until a higher peak is reached.
- Meter is updated 5 times per second so there could be 200mS delay in peak being displayed.
I think we should garner user feedback then configure with parameters that provide the best indication of level to meet user requirements. I think that providing user configuration of meter dynamics may prove a support burden with little benefit. Once you have a meter that works well then most users will be happy. I don’t know of many users that requested they could change the dynamics of their VU meters in their cassette machines!!!