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* Recording Audio => Red '''circle''' flag
 
* Recording Audio => Red '''circle''' flag
 
* Playing Audio => Green '''play''' flag
 
* Playing Audio => Green '''play''' flag
 
+
The Audio Peak-meter is shown by default. 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:  
By default, Audio Peak-meter is shown. 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 segment covers the range -50dBFS to -10dBFS.
 
* The green segment covers the range -50dBFS to -10dBFS.
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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. 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.  
 
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. 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 200 ms delay in peak being displayed.
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(*) Meter is updated 5 times per second so there can be 200 ms delay in peak being displayed.
    
Alternately, CPU-load bar can be enabled from webconf, replacing the Audio Peak-meter. The CPU-load bar shows the CPU usage as calculated by the Jack Audio Server:
 
Alternately, CPU-load bar can be enabled from webconf, replacing the Audio Peak-meter. The CPU-load bar shows the CPU usage as calculated by the Jack Audio Server:
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The blue M flag is shown when MIDI messages pass thru the MIDI router. Not all messages are detected. Only CC, Program Change and Note On/Off.  
 
The blue M flag is shown when MIDI messages pass thru the MIDI router. Not all messages are detected. Only CC, Program Change and Note On/Off.  
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The red "warning" flag is shown when there are Xruns. You should hear clicks and pops too ;-)
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The red "warning" flag is shown when there are Xruns. You should hear clicks and pops too.
    
When the red "ray" or "thermometer" flag is shown, your zynthian is working in a degraded state, with the CPU frequency capped to 600-800 MHz, trying to stabilize the system and avoid a system crash. You shouldn't see any of them and if you do so, you should consider looking for a better power source (under-voltage) or using a heat sink (over-temperature).
 
When the red "ray" or "thermometer" flag is shown, your zynthian is working in a degraded state, with the CPU frequency capped to 600-800 MHz, trying to stabilize the system and avoid a system crash. You shouldn't see any of them and if you do so, you should consider looking for a better power source (under-voltage) or using a heat sink (over-temperature).
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