That was a lot of programming. I rewrote the linear scaler, it's available in my features_xwax2 branch. There are still subtle clicks and pops at very very low speeds and moving from a dead stop, but I can't get rid of them and they could just be part of mp3-encoded files for all I know.
I have a lot of trouble analyzing the samples in order to figure out where these pops come from. I feel like 90% of my time was spent doing that. Owen On Mon, 2010-11-22 at 09:23 -0500, Owen Williams wrote: > Cool, thanks. I think I figured out a way of keeping the sub-sample > position inside the scaler so I'll take a shot at fixing it too. > > Owen > > On Mon, 2010-11-22 at 06:48 -0300, Phillip Whelan wrote: > > I'm sure this bug is also caused in part by the problem with playpos > > always being rounded. > > > > > > There is an old patch for it on the mailing list. > > > > > > I'm currently visiting family in chile but will see if I can update > > the patch for trunk. > > > > Sent from my iPod > > > > On 2010-11-22, at 2:23, RJ r...@mit.edu> wrote: > > > > > > > > > Hey Owen, > > > > > > > > > Have you merged your branch with trunk lately? A patch from 1.8 was > > > reverted that improves the linear scaler audio quality a lot (but it > > > the progress made on fixing the bug where the engine eats too many > > > samples). > > > > > > > > > RJ > > > > > > On Sun, Nov 21, 2010 at 11:15 PM, Owen Williams <owen-b...@ywwg.com> > > > wrote: > > > Hey all, > > > > > > I've noticed that at extremely slow speeds and during > > > scratching, mixxx > > > sounds pretty terrible. There are lots of clicks and pops > > > and high > > > pitched static. At first I thought this was because I was > > > scratching > > > mp3s, but I took xwax 0.8 for a spin and it sounds much, > > > much better. I > > > spent a day hacking on the linear sound scaler without much > > > to show for > > > it. From looking at xwax, it looks like it uses a cubic > > > interpolator > > > instead of linear. I tried implementing that logic into > > > mixxx, with > > > disastrous results. > > > > > > So clearly I'm not an audio programmer. But is there > > > anything that can > > > be done to improve performance of the scaler at low / fast > > > changing > > > rates? > > > > > > thanks, > > > Owen > > > > > > > > > > > > ------------------------------------------------------------------------------ > > > Beautiful is writing same markup. Internet Explorer 9 > > > supports > > > standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 > > > & L3. > > > Spend less time writing and rewriting code and more time > > > creating great > > > experiences on the web. Be a part of the beta today > > > http://p.sf.net/sfu/msIE9-sfdev2dev > > > _______________________________________________ > > > Mixxx-devel mailing list > > > Mixxx-devel@lists.sourceforge.net > > > https://lists.sourceforge.net/lists/listinfo/mixxx-devel > > > > > > > > > ------------------------------------------------------------------------------ > > > Beautiful is writing same markup. Internet Explorer 9 supports > > > standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. > > > Spend less time writing and rewriting code and more time creating > > > great > > > experiences on the web. Be a part of the beta today > > > http://p.sf.net/sfu/msIE9-sfdev2dev > > > _______________________________________________ > > > Mixxx-devel mailing list > > > Mixxx-devel@lists.sourceforge.net > > > https://lists.sourceforge.net/lists/listinfo/mixxx-devel > > > > > > > ------------------------------------------------------------------------------ > Beautiful is writing same markup. Internet Explorer 9 supports > standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. > Spend less time writing and rewriting code and more time creating great > experiences on the web. Be a part of the beta today > http://p.sf.net/sfu/msIE9-sfdev2dev > _______________________________________________ > Mixxx-devel mailing list > Mixxx-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/mixxx-devel > > ------------------------------------------------------------------------------ Increase Visibility of Your 3D Game App & Earn a Chance To Win $500! Tap into the largest installed PC base & get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev _______________________________________________ Mixxx-devel mailing list Mixxx-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mixxx-devel
