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?

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

They are just linear values.

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This blog post: and a few other random comments mention FMOD supporting BS.1770. Is this actually true?

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.

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

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: )