[linux-audio-dev] LADSPA_Data audio values

Chris Cannam cannam at all-day-breakfast.com
Thu Dec 21 21:28:02 UTC 2006

On Thursday 21 Dec 2006 21:19, Iain Young wrote:
> Now..here's where Im confused. I thought the values for audio samples
> in LADSPA were -1.0f...1.0f (with -1.0f being infinity).

The range is a voltage range.  It's -1.0 to +1.0 where 0.0 is 
effectively -Inf dB, -1.0 is 0dB at negative voltage and +1.0 is 0dB at 
positive voltage.

"Digital silence" is all zeroes, not all -1.0s.  Though inputs coming 
from hardware will be low level noise rather than absolute silence.


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