[Sv1-devel] dBFS

[Christofer B. <tos...@ho...>]

Hi there,

Thank you to all who contributed to this great and very useful piece of open-source software.

I wonder if someone may help me to understand something... If I generate a pure sine wave at say -20 dBFS in Adobe Audition, Sonic Visualiser displays the level -10 dBFS in the waveform view. Similarly, if I generate a sine wave at -40 dBFS in Adobe Audition, Sonic Visualiser displays the level -20 dBFS. Could it be the case that Sonic Visualiser calculates the dB values using 10*log10(input)? It was my understanding that dB values usually are calculated from sample values using 20*log10(input). Am I missing something in my understanding of this or could this be a bug in Sonic Visualiser? There also seems to be a similar difference in the spectrum view when I compare Sonic Visualiser to Adobe Audition.

Thank you very much in advance!

Best regards,
Christofer