FMOD_DSP_METERING_INFO units?

FMOD Engine
1

I’ve been looking around and haven’t been able to find any documentation on this.
What are the units for FMOD_DSP_METERING_INFO rms and peaklevel?
(http://www.fmod.org/docs/content/generated/FMOD_DSP_METERING_INFO.html)

I’ve read conflicting reports online that they are BS.1770 LKFS or LUFS.

2

They are just linear values.

1 Like
3

This blog post: http://www.stephenschappler.com/2013/07/26/listening-for-loudness-in-video-games/ and a few other random comments mention FMOD supporting BS.1770. Is this actually true?

4

We have a separate DSP type FMOD_DSP_TYPE_LOUDNESS_METER that can be added to the signal chain to get LUFS. Unfortunately it is not well documented because it is designed for internal use with our tool.

5

I wouldn’t add this to each individual channel, it’s designed to meter the master bus only in terms of memory and CPU.

6

Is there any documentation online or that you can share for FMOD_DSP_TYPE_LOUDNESS_METER?

(Or should I reverse engineer it and hope you don’t break binary compatibility in the future? :slight_smile: )