Tim Roberts wrote: > 3. current volume (in dB) + 20 * log10( peak value ) I agree with your formula for PPM meter, but it doesn't correspond to low-range of IAudioEndpointVolume::GetVolumeRange. Here is my opinion. 1. Current Volume (in dB) * Peak Value This is VU meter formula. I have made tests and it seems, it is used by standard Vista/7 mixer to display picks. 2. 20 * log10( peak value ) This is PPM meter formula. It has no correlation to the range of volume levels returned by IAudioEndpointVolume::GetVolumeRange. Am I correct? ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.com/
