On Wed, May 11, 2011 at 09:45:05AM +0300, Sviatoslav Chagaev wrote: > On Wed, 11 May 2011 03:35:56 +0000 > Jacob Meuser <jake...@sdf.lonestar.org> wrote: > > > clipping is better than normalizing? really? > > Clipping might describe something like value&0xffffff, so no, not > clipping, saturating addition. > Try it and see for yourself.
truncating higher bits or clipping alter the stream non-linearly and imo both are evil. > > > > > what about the case where aucat is used for offline mixing? > > > > What about it? > I'd like "aucat -n -o result.wav -i file1.wav -i file2.wav" to not saturate. > > like the mixerctl change, you are taking away things that exist > > for good reason, because it makes *your* situation better in *your* > > opinion, when you can (mostly) have what you want with the current > > code (if you just try a little). > > > > I'm not taking anything away, I'm setting things right. > Like I already said, the -v option stays fully functional. > Everything can be boiled down to opinion. Please don't answer > in the style "you're wrong because I said so". It's more complicated that "i'm right so you're wrong". Mixing (as other processing in aucat) is best effort. It's a compromise between quality loss by distortion and by dynamic range reduction. > I've already given enough insight and evidence as to per why the > way it's done currently is wrong. > Come on, both approches are physcally wrong, it's a matter of taste, and the way you claim it's wrong tends to be irritating. Espectially since this is 3+ years old code, and you guess this was discussed plenty of times. > Explain why it's not important to adhere to the least surprise > principle. least surprise priciple for me is: streams do not suffer non-linear distortion when played through aucat. > Explain why is it better to force the users to choose between > two evils when they could be offered one good. Because diffent users may have different needs. > Explain why aucat should not model real world sound physics. > because DACs have limited dynamic range; if you use "-v 100", your closer to sound physics than with clipping. [...] And note that two approaches are not exclusive. If you don't like the way dynamic range is shared, roll a nice diff to disable this feature. If people like it, and it hurts nobody, they will take it. -- Alexandre
