Hi,
Another solution if you really want to switch of the normalization is
to use a switch between the normalized and the original source, i.e.
s = ... # main source
b = interactive.bool("norm", true)
s = switch(track_sensitive=false, [(b, normalize(s)), ({true}, s)])
output.icecast(..., s)
Cheers,
Samuel.
On Sun, Aug 18, 2013 at 10:41 PM, Romain Beauxis <[email protected]> wrote:
> Hi Yoann,2013/8/14 Yoann QUERET <[email protected]>
>
>>
>> Hi,
>>
>> I would like to enable/disable normalize or limit without restart
>> process and stream.
>>
>> My simple test script is :
>>
>> source = input.alsa( device = "hw:0,0" )
>> source = normalize( id="normalize", ...., source)
>> source = limit( ...., source)
>> output.icecast( id="stream", ...., source)
>>
>> I can enable or disable stream using telnet or socket (stream.stop or
>> stream.start) and i have no idea to make the same via telnet or socket
>> for normalize or limit.
>>
>> Any idea ?
>
> If you look at the parameters for the normalize operator:
>
> * gain_max : anything that is either float or ()->float (default: 6.)
> Maximal gain value (dB).
>
> * gain_min : anything that is either float or ()->float (default: -6.)
> Minimal gain value (dB).
>
> * k_down : anything that is either float or ()->float (default: 0.1)
> Coefficient when the power must go down (between 0 and 1, slowest to
> fastest).
>
> * k_up : anything that is either float or ()->float (default: 0.005)
> Coefficient when the power must go up (between 0 and 1, slowest to
> fastest).
>
> * target : anything that is either float or ()->float (default: -13.)
> Desired RMS (dB).
>
> * threshold : anything that is either float or ()->float (default: -40.)
> Minimal RMS for activaing gain control (dB).
>
> You will notice that these values are types as "float or ()->float". This
> means that you can use either a fixed value or a callback for them. For
> instance:
>
> # Callback returning gain_max
> def gain_max() =
> # .. compute/fetch value
> 8. # Example return value
> end
>
> This way, you should be able to use any value you want at any time.
>
> Hope this helps,
> Romain
>
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