Teus de Jong;566127 Wrote: > Correct me if I'm wrong, but as far as I know this is only the case when > the peak level doesn't allow for positive gain, because it would cause > clipping. So, although primitive, it would only apply to albums/tracks > with a very high peak level. > > I looked at the peak level for several classical albums. It seems this > is given as a number between 0 and 1. Most of my classical albums have > a peak level around 0.9. So this would leave 19% volume gain without > clipping. > > But maybe this reasoning is totally wrong. I never understood why the ReplayGain peak tags are expressed as a number up to 1.0, while their gain tags are in dB - it is bound to cause confusion. With that in mind, you should be aware that a peak value of 0.9 is about -0.92dB, which means there is less than 1dB of headroom to play with.
But let's go back to the way Squeezeboxes implement RG... In principle, it should be possible to apply a full RG positive gain if the peak level plus any digital attenuation exceeds the required gain. For example, if a file's peak level is -1dB and the playback device also has a digital attenuation of 3dB, then a positive gain of up to 4dB can be accomodated. But this is only what is theoretically possible - it is NOT how it gets implemented in Squeezeboxes. They ignore the digital attenuation setting, applying only as much positive gain as can be applied based solely on the RG peak tag. So in the example here, you'll get only 1dB of gain regardless of the SB's volume setting. I initially thought that this was just because the programmers were being lazy (although at the time it was good that the clipping bug got fixed at all). However, some time ago, someone (sorry, I forget who) made the observation that this approach can be considered to make sense. If the digital attenuation were also taken into account, you'd end up in the situation where changing the SB's volume control didn't make any difference to the playback level in some circumstances. That behaviour would seem a bit peculiar to many users. -- cliveb Transporter -> ATC SCM100A ------------------------------------------------------------------------ cliveb's Profile: http://forums.slimdevices.com/member.php?userid=348 View this thread: http://forums.slimdevices.com/showthread.php?t=71138 _______________________________________________ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/discuss
