On Monday 07 October 2013 15:53:52 Robin Gareus did opine: > On 10/07/2013 11:59 AM, Jِrn Nettingsmeier wrote: > > On 10/05/2013 06:56 PM, Robin Gareus wrote: > >> Additionally it includes a Stereo Phase Correlation Meter (needle > >> Display), an EBU-R128 Meter (also based on Fons' implementation) with > >> Histogram and History display, a Digital True-Peak Meter (4x > >> Oversampling, using zita-resampler), a Stereo Phase Scope > >> (Goniometer) and a 31 Band Spectrum-Analyzer. > > > > (insert usual friendly ridicule of animated VU meters here) > > lol. yeah, VU meters just exist to look nice :) > Even most of the hardware ones are utterly useless (see "[LAD] vu-meter > DSP" this July). At least this one does conform to spec. Thanks Fons. > > > but hey, it does look nice! i've always had this fondness for > > jellyfish meters. > > The goniometer(TM) aka Stereo Phase Scope is not a jellyfish display. JF > would be a surround 5.1 variation. Your attempt at applying a trade mark to that word is about 45 or 50 years late, that was the term used to describe a rotary transformer used to rotate the display in color tv (NTSC days) vectorscopes first built by Tektronx. > I was actually positively surprised how much information is displayed by > a goniometer. It takes a while to learn to read it, but it's amazing. Yes it is. The learning part however, does separate the wannabees from the doers though. > We (Chris, Axel and I) went through various stages including > video-taping the LV2 plugin display in order to improve readability and > usefulness. The default preset is very close to that of a DK-Tech MSD600 > > > and the radar-style r128 meter is a very welcome addition to the > > toolbox, having this history information at a glance is very helpful > > indeed. thanks for sharing this! > > > > built without problems and seems to run very smoothly. > > great. thanks for the feedback. > > > i believe radar meters have a bright future in different applications. > > for instance, to provide limiter history. fons' zita-dpl1 has > > short-term history already, which is extremely helpful. but to > > imagine something that listens to transport information and provides > > history of a whole song, plus "locate to peaks" from the history so > > that i can manually tame parts where the limiter cut in too sharply, > > that would be awesome. > > 'locate to peaks' is a very nice idea. However I'm not aware of any > plugin standard that allows to control the host's transport. A LV2 > extension could do that, though. zita-dlp1 could do this via > jack-transport. > > > i'm currently trying to make sense of the libcairo version number in > > opensuse tumbleweed, but i guess our lady of the segmentation fault > > will let me know if there is a problem... > > Depends. Thread-safety and concurrency issues may rather produce strange > effects than segfault right away. It's mainly the EBUR128 meter (rapid > font rendering), Try adding two or more instances of the openGL variant. > > It also depends on your graphics card. The plugins render directly to > graphic card memory. It works fine here with an old intel-945 and some > nvidia cards that I have tested: zero CPU. But Axel has various problems > with his Radeon on debian/stable. Also x11/xcb can make a huge > performance difference. -- Anyway, the concurrency issues > cairo/pixman/pango + x11/opengl have been fixed upstream and will soon > find their way int various distros if they have not yet done so. > > Cheers! > robin > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > http://lists.linuxaudio.org/listinfo/linux-audio-user Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) A prohibitionist is the sort of man one wouldn't care to drink with -- even if he drank. -- H. L. Mencken A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
