On Wed, Oct 08, 2014 at 09:15:44PM +0100, Jonathan Gazeley wrote: > However, I'm struggling a bit with dynamics processing on the > recording. Naturally, choral music has an extremely wide dynamic > range. If you normalise the infrequent loud parts to 0dB, the rest > of the recording is too quiet, and people have complained that the > CDs are "too quiet" compared to their other CDs. I know that people > listen to these recordings on their iPod or in the car and if the > quiet parts are too quiet, then they simply can't hear them. > > We all know about the loudness war and I certainly don't want to > compress the crap out of these delicate and beautiful recordings. > But I think some subtle compression would help bring up the average > amplitude without clipping the loud parts. I've experimented a bit > but I'm struggling to get a "natural" sound. After compression, it > sounds fine in the quiet parts but in the louder parts it sounds > "lumpy" and the reverb sounds unnatural. Almost all recordings I've made during the last five years were of contemporary or late 20th century 'classical' music, and this can have a very wide dynamic range. They also were made for radio broadcasting, which meant that dynamic range had to be reduced. There are several methods, and the best approach is to make each of them handle a few dBs, and combine them. * If you use Ardour to record, then editing the region gain curve is a very convenient way to reduce the dynamics in function of the music itself (it's much easier than trying to use automation for this). The advantage compared to using compression is that you can anticipate level changes - as you would when adjusting the level manually while reading the score. * In many cases I've used a gentle automatic compression, with a ratio of 1.2 or so and a low threshold, so you get a very gradual gain change over a wide range of levels. This was done using zita-dc1, which unfortunately is not released yet. * In most cases peaks are very short, and a peak limiter will remove them and allow 5 dB or more extra gain without any perceptible artefacts. The best one for this is zita-dpl1 which was designed exactly for this type of use. I've used it on all recordings I made the last years, without exception. Combining these, it's not at all difficult to boost your average level by 15 dB or so (and even more if needed) in a way that will still sound completely natural. Ciao, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow) _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
