[LAU] jack clipping level in dB

[andy baxter]

On 26/04/11 21:52, Harry Van Haaren wrote:
>
>
> On Tue, Apr 26, 2011 at 9:36 PM, andy baxter 
> <andy at earthsong.free-online.co.uk 
> <mailto:andy at earthsong.free-online.co.uk>> wrote:
>
>     I have a signal from a Supercollider program which goes into jack.
>     I want to adjust the signal level so it's as loud as possible
>     without clipping. Could someone tell me what is the loudest sound
>     that doesn't get clipped in dB, as measured by ardour or
>     meterbridge for example?
>
>
> To be nasty, 0dBFS... but that's not the answer you're looking for. 
> JACK's audio is floating-point between -1 -> 1.
> Hence outputting all 0's is silence. If you scale your output to be 
> between -1, 1 then you've got what you want.
>
> Note that inter-sample peaks in high frequencies will still go beyond 
> your DAC's range, so there might be clipping in hardware... but I'm 
> not too certain in that field.
>
> Cheers, -Harry

OK. I was aiming for about that, but I noticed that ardour's peak level 
meters go into positive decibels as well.

thanks,

andy