VANELi Vevila Ankle Strap Sandal Black Printed Suede 1oI2f

gKsvesjRgG
VANELi Vevila Ankle Strap Sandal Black Printed Suede 1oI2f
Twirl the night away on the dance floor in this evening sandal that's always comfortable, with a lightly cushioned footbed and low kitten heel. Style Name: Vaneli Vevila Ankle Strap Sandal (Women). Style Number: 5541725. Available in stores.
Read more
Read more

Looking for a way to give back to Performing Life International, and support the work we do? We’ve partnered with Goodshop to help you save while you shop! Goodshop finds you the best deals on the internet — coupons from all your favorite stores like Best Buy promo codes for those new phones, dvds or […]

Topshop Ruffle Mini Bardot Dress Pale Blue o6xSy0Y1l6

Last night, the Performing Life grown-ups were at Parlana, Cochabamba’s language exchange night, selling bracelets and CDs made by the children. We also held a raffle for some rather excellent cheese! Fun was had. Balls were juggled. And a TV crew interviewed Adalid about our work, so stay tuned for that next week. Thanks to […]

Read more
More News!

Hear from our community

THE TEAM

meet Marye

My name is Marye Dijkstra and I am from The Netherlands. From an early age I have always had a natural instinct to help other people, especially children, but above all: whole family systems. Offering disadvantaged families in less fortunate situations the opportunities to further their aspirations, goals and expectations of life. I believe it is a challenge to make people stronger and teach them to discover their own strengths and talents to change their own present and future.

Read more
In 2010 I worked for 3 months as a volunteer in a day-care center for children with special needs in Cochabamba, Bolivia. I was immediately excited about Bolivia with its authentic and special culture, nature and population. I graduated with my Master’s in pedagogical sciences in the Netherlands in 2011. After graduating, I returned to Bolivia for 1.5 years to volunteer again, this time with orphans.

Unfortunately I couldn’t volunteer forever, so I returned to The Netherlands to work two years with young adults who suffered from mental disabilities and conduct problems, but still with the plan to live in Bolivia in the future again. Then, at the end of last year, I was really happy to discover that Performing Life had a vacancy. I read a lot about the organization and I was directly feeling morally connected to their mission and goals. I love that Performing Life has a fun and cheerful method to achieve a serious purpose. I think it is exactly the right method to reach children, their families and communities. The organization has different, complementary, programs to achieve a better future for people who really need it. So, I am really lucky to be able to say that since mid-February I am working as the new National director. I am here just for two weeks right now and I already feel comfortable and really welcome in the Performing life team!

Meet the total team!

THE CHILDREN

meet Christian

Cristian Maire , 12, joined Performing Life (PL) in April 2012. He lives with his stepfather, mother, and older brother; he doesn’t know his father, who abandoned the family before Cristian was born. His family lives in one room in the Montenegro region, about 20 km west of Cochabamba. Because Cristian’s family has only one bed, he sleeps on the floor. Cristian’s stepfather is often verbally abusive, and worse, sometimes beats him.

by roger

What is jitter?

It’s the undesired deviation of a periodic signalfrom the ideal timing…

Right…

OK then…

So, even though the above definition is correct, it doesn’t really let you know why jitter is bad for a digital audio signal, how jitter actually degrades the signal or what the aural effects of jitter are. Let’s take a closer look at jitter in order to answer these questions.

First, it’s helpful to understand a bit about word clock. Here’s a graphical representation of a word clock signal:

A word clock signal acts like a conductor, providing a timing signal to all the parts of a digital audio system so that each process may be triggered at a precise moment. If you think of your digital audio system as an intricate mechanical device, the word clock is analogous to the teeth of the gears that make various parts of the device move together. Think of Charlie Chaplin in “Modern Times”:

Here’s another way to think about how a digital audio system works. Start with an analog waveform:

Now, in order to digitize this waveform (i.e describe it using numbers), let’s overlay a piece of graph paper:

Using the graph, we can describe the waveform with letters and numbers:

At A the wave is 8;

at B the wave is 11 ;

at C the wave is 14 ,

at D the wave is 15 , and so on.

We could store these numbers and use them to recreate the waveform later. Please don’t bust our chops about the obvious inaccuracy between the red waveform and the blue points, it’s an analogy, people.

So, to forge on with the analogy, imagine that the letters are samples and the numbers are bit levels. Now we’re recording digital audio. It might look like this:

At sample 1, digital level is 0111;

at sample 2, digital level is 1011; and so on.

Notice our word clock signal at the top of the graph. It’s the signal that triggers each sample in a digital audio system.

Once we’ve recorded our waveform as numbers, we can “re-plot” the points and re-draw the waveform to get back our original signal. We’ve just recorded and played back a digital audio signal.

The process of converting our waveform to numbers is called analog to digital conversion – here’s what it might look like:

The process of converting the numbers back into a waveform is called digital to analog conversion – here’s a movie of that process.

Now, throughout this whole process we’ve assumed that the vertical lines on our graph paper are evenly spaced. Imagine that we got some faulty graph paper where the vertical lines weren’t evenly spaced and we attempted to re-draw our waveform using the numbers we previously recorded. Clearly the resultant waveform would not be like the original:

Look at the top of our graph, that’s what a jittery word clock looks like. Notice that the distance between the transitions is uneven – this is jitter.

Though we’ve greatly exaggerated the amount of jitter in this graphic, it does show how a jittery word clock causes samples to be triggered at uneven intervals – this unevenness introduces distorsion into the waveform we’re trying to record and reproduce.

For another take on jitter, let’s think again about Charlie Chaplin and “Modern Times”. A film functions in a similar manner to digital audio, in that a film camera doesn’t record every instant of a scene, but rather “samples” a scene by taking a series of still pictures at a fast enough rate to fool the eye into thinking it sees fluid movement. As you can imagine, the regularity of the exposure (and subsequent projection) of film frames is crucial to maintaining the illusion of fluid movement. Back in the days of Chaplin, early film cameras weren’t so even – frame jitter made the movement seem jerky and unnatural.

If jitter gets into our D-to-A stage, it degrades the playback. The original digital recording is intact, and we just need to remove the jitter or get a better D-to-A converter to resolve the issue. Going back to our film analogy, if our projector is uneven, our film is probably fine, we just need a better projector.

On the other hand, if jitter gets into the A-to-D stage, those errors are “baked into” the digital data – there’s no recovering the original waveform. If you’ve shot your film with a hand cranked film camera, there’s no way you’re getting that jerky motion out of the film. This is why getting the A-to-D stage of a digital recording system right is so crucial.

So, what does digital audio affected by jitter sound like? To answer this question, imagine a recording of an orchestra made with a perfectly placed stereo pair of mics. If you listen to the analog output of the mic pres, ideally you’ll have a precise and wide image of the orchestra. If you closed your eyes, you could point to the triangle player, there, behind the second violins.

Smaller amounts of jitter start to cloud the precision of the stereo image – you can’t pinpoint sources as clearly. As greater amounts of jitter degrade the system, the stereo image starts to shrink – your orchestra isn’t so wide. With increasing jitter, changes in timbre occur that accentuate ugly harmonics.

To avoid jitter, use a finely engineered clock source as found in all of Apogee’s interfaces. If you’re using multiple digital devices, use a Master clock like Apogee’s Big Ben and make word clock connections using our Wide Eye cable.

Finally, be aware that frequency drift, often mentioned when discussing digital audio clock, isn’t jitter… see here!

Havaianas Flatform Fashion Espadrille Golden Sandals Tan UXUBd3Tv

Designed in California Built in the U.S.A.

Apogee Electronics

© 2018 Apogee KnowledgeBase

Back to Top

Donate

It’s Summertime, But These Students Can’t Wait to Go to School

Jack and Jones Ankle Boots Beige zb9K8f8Uw
Steffen Schraut Dress With Pleated Skirt Black Ptmea
[audio:QuickPoint – 7-22-09.mp3]Click the play button to hear the audio Quick Point.

Most gradeschool children are enjoying their summer off, but some young Oregonians already have September on their minds. You see, they are on the waiting list of the Children’s Scholarship Fund-Portland and eagerly hope to attend the school of their choice next fall.

In the last ten years, almost 650 lower-income Oregon children have received a quot;hand upquot; in their education through the Robert Clergerie Peep Toe Wedge Sandals Black FnJP0v
.

Families of greater financial means may already have quot;school choice.quot; They can move to a neighborhood with a public school they like, or they can pay for private or parochial school tuition.

But those options are often out of reach for lower-income families. Despite their willingness to sacrifice to give their children the best education they can, lower-income parents still may find their children trapped in schools that do not meet their kids’ needs. The demand for choice in education is growing. Parents want the best for their children, and private programs like the Children’s Scholarship Fund-Portland are proud to help them achieve it.

As for that waiting list? If you would like to make a dream come true this summer for a low-income Oregon child who is eager to learn and to succeed in school, visit Cascade Policy Institute on the web at Jimmy Choo Sneakers White b5t0YNWE
and click on the Children’s Scholarship Fund-Portland.

Bottega Veneta Nodini Leather Crossbody Bag Pink cCgOwgd3
is Publications Director, Director of the Children’s Scholarship Fund-Portland, and Development Coordinator at Cascade Policy Institute, Oregon’s free market public policy research center.

Share Post

Leave a Comment

Cascade’s mission is to develop and promote public policy alternatives that foster individual liberty, personal responsibility, and economic opportunity.

More About us

CASCADE COURIER E-NEWSLETTER SIGNUP

Supreme Court Janus Decision Upholds July 4, 2018
U.S. Supreme Court Rules In July 3, 2018
U.S. Supreme Court Rules Today June 27, 2018

CHIARA P Handbags Black kd5RpDVu5c

4 hours ago

Dear Democratic Socialists Who Think You’re Having a Moment: It’s Me, a Libertarian, Who’s Been Through This. #defendliberty #promoteopportunity See More See Less

Lovers Friends X Revolve Logan Dress Gray P8YC13
171 notes
Oct 31st, 2014
  1. scuterloo liked this
  2. sporadickittencollectorsstuff liked this
  3. Paul Smith Ps By Flat Ankle Boots Calf Leather Leather 385 Black bG3HFLVI
    liked this
  4. South Parade Star Sneakers Silver Black TaYlGOK4
    reblogged this from yoshifan30
  5. frithislord liked this
  6. goldenshadow11 liked this
  7. yoshifan30 reblogged this from Alexander McQueen Bell Sleeve Mini Dress In Floral Black White rhBkTBp
  8. lunas-royal-guard liked this
  9. page-with-no-title liked this
  10. cartooniste2z liked this
  11. yoshifan30 liked this
  12. wisefireland liked this
  13. papermillgraffiti liked this
  14. pembekhalilah reblogged this from Prada Concept Tote Bag Brown kIAow
  15. totallynotpervscoots reblogged this from Furla Eden Tote Pink And Purple HZB2Ek
  16. fluttershyhug liked this
  17. powerninja12 liked this
  18. Rebecca Vallance Adriatic Eyelet Embellished Crepe Midi Dress White wh01G
    liked this
  19. iamthewanderingbard liked this
  20. To Boot New York Alek Suede Penney Loafers Blue ojJnO6aw
    liked this
  21. klaueyt reblogged this from girlbrony89
  22. pembekhalilah liked this
  23. klaueyt liked this
  24. girlbrony89 reblogged this from Stella McCartney High Top Trainers 8523 SilvMatt PGr Rbrrb 1cjKwiD
  25. kitkat1461 liked this
  26. sponzo815 reblogged this from Calvin Klein Jeans Sneakers Black CvOpe1V
  27. Foley Corinna And Brittany Leather Satchel Black Gold Ca6C5O
    reblogged this from Ninalilou Pumps Dark Brown l7fWyh7Oh
  28. Olympiah Andes Ruffled Dress Black LUwVE
    liked this
  29. wickedjr89 liked this
  30. sunligthduskshine liked this
  31. Converse Sneakers Red 82FC4j
    liked this
  32. Alexander McQueen Larry White Leather Trainers C6LTd
    liked this
  33. gigglepuffpixie liked this
  34. ringo29 reblogged this from texasuberalles
  35. ringo29 liked this
  36. adidas by Stella McCartney Adissage Slides Mirror Blue Ftwr W vZrTLep4
    liked this
  37. keroseneandfire liked this
  38. obscurewalnut liked this
  39. Endless Rose Ruffle Dress Gray qw1sxkSGp
    liked this
  40. reversalmushroom liked this
  41. chumguzzle reblogged this from texasuberalles
  42. chumguzzle liked this
  43. deadunivers liked this
  44. 37shadowbolt liked this
  45. texasuberalles reblogged this from starshippizza
  46. Oscar de la Renta Tro Mini Embellished Metallic Textured Leather Shoulder Bag Silver hbHaX
    liked this
  47. Kendall Kylie Sandals Black eiOEc9Pjkt
    reblogged this from starshippizza
  48. juice-box-kittens liked this
  49. DKNY Elissa Cross Body Bag Black 6PAIp5n
    reblogged this from starshippizza
  50. fire-flash liked this
  51. Show more notes Loading...