Topic: H120 Level Meter

[petur]

It seems that setting AGC-max affects how much the input can turned up by the user as well.  Seemingly capping input levels at a user selected point.

Never too old to learn
I've never used that option, good to know....

[Arni99]

It seems that setting AGC-max affects how much the input can turned up by the user as well.  Seemingly capping input levels at a user selected point.

Never too old to learn
I've never used that option, good to know....

yes, when "AGC-max" is set to ie. +24dB you can´t set the gain for l+r channel to any value higher than +24dB. rockbox will immediately correct gain to the set max. value of 24dB when you try to set gain to ie. +26dB.

[George]

I gotta admit, i'm safety clip stupid.  I just dont get how it works (other than its not your normal agc crap).  I have my meters set to -20 to 0.  So, if I'm using safety clip, what should I set the db gain to and why?  Just trying to understand the coorelation between the two.  I like pushing my levels as close to 0 as possible.

[Arni99]

I gotta admit, i'm safety clip stupid.  I just dont get how it works (other than its not your normal agc crap).  I have my meters set to -20 to 0.  So, if I'm using safety clip, what should I set the db gain to and why?  Just trying to understand the coorelation between the two.  I like pushing my levels as close to 0 as possible.

i usually set l+r gain to +20 or +15dB before the concert starts.
AGC-max to +24dB but that´s not important when u start a concert with +20dB(and +24dB would be the max. gain possible).
AGC-safety will REDUCE levels as soon as clipping might occur.

example:
the band starts playing ...your l+r gain is set to ie. +20dB.
AGC safety will reduce gain immediately to ie. +15dB. why? because +20dB would have resulted in clipping levels.
AGC safety will NOT increase gain again when a loud opener is followed by a ballad and that´s GOOD .

you still can set levels by hand although AGC-safety is activated...AGC-safety only kicks in when levels might clip or actually clip(though clipping is NOT audible when playing back your recording) except you started with +40dB instead of +20dB for l+r gain.
just play with it and record at home from your stereo and you will see whats happening on the recording screen .
it´s not hard to understand, really!

try to set l+r gain to +30dB when AGC-max is set to +24dB.
you´ll see it´s NOT POSSIBLE as +24dB is the max. gain and no higher gain is possible .

l+r gain is the same as the 1 to 30 gain for MD recorders. it tells you the amount your signal is amplified by the internal preamp.
levels show the recorded signal, of course 0dB on the levelmeter should be maximum for MD recorders.
on rockboxed irivers you don´t see figures on the levelmeter....bouncing from left to right.
you only know that levels clip when they hit the right border of the recording screen(and clipping light flashes if activated).
thats when AGC-safety kicks in and reduces gain for preventing levels from clipping.

[Liquid Drum]

So, basically no matter what you set your levels to, the AGC will lower the level if its too loud?? and once its lowered it enough to prevent clipping it will stay at that level for the rest of the gig (unless it starts clipping again)??

But as you say, its better to start off with maybe +15 or +20.

I'm beginning to understand now. Thanks for that long explanation Arni +t 

[Arni99]

So, basically no matter what you set your levels to, the AGC will lower the level if its too loud?? and once its lowered it enough to prevent clipping it will stay at that level for the rest of the gig (unless it starts clipping again)??

exactly as you said!

[George]

Thanks a bunch for answering that question Arni, makes perfect sense now....and yes, I will definitely test it   

[Liquid Drum]

Yup, thanks to all who helped me too. Can't wait to get this baby taping!! 

[Arni99]

also check this thread where i explain AGC-safety with pics of my H140...for those who found it yet...
http://taperssection.com/index.php/topic,85618.msg1140063.html#new