For a period of time last year I worked for a hosting provider in the marketing department. They tasked me with explaining the concept of bandwidth for the corporate blog, but they never used it. As I’ve been gone for the better part of a year, I figured I might share it without issue.


In the past, you could only watch entertainment when and where the providers said, in front of your TV via terrestrial cable at a prescribed time. At the same time, gaming was primarily an offline pursuit. Because media consumption is now on-demand, on location, over the Internet, and 24/7, hosting customers are finding their own customers eating through bandwidth far more quickly than they did a few years ago, and that quickly scalable hosting infrastructures will be more and more important.

Some stats: In 2011, more than 100 million Americans watched online video content each day, a 43% increase over the previous year. At the beginning of 2012, more than 11% of all digital traffic was consumed over smartphones and tablets; a year later that number had jumped to 21%. In addition, mobile device penetration is increasing fast. In Australia, the US and the UK, smart phone user penetration topped 50%. This is expected to be true in most of western Europe by 2014.

In this blog we’ll talk about what bandwidth means and how video, gaming, and advancements in mobile internet are driving bandwidth consumption.

What Do We Mean When We Talk About Bandwidth

In the context of web or data infrastructure hosting, we’re really talking about two things:

  1. An amount of data traffic going over the network, usually measured in bytes (kB, MB, GB). When a hosting company offers “unlimited bandwidth” it means the amount of data traffic served is limited only by the port’s capacity.
    In general, the term “unlimited” has been replaced with the more accurate “unmetered”.
  2. The rate at which data travels over the network as measured in bits per second (kbps, Mbps, Tbps).

On an unmetered port, your data traffic limit is calculated by multiplying the rate of the port (in bits) by the number of seconds in the period you want to discuss and dividing by 8 because traffic is measured in bytes, but port capacity is measured in bits. By this measurement, the daily traffic limit on an unmetered 1 Gb port should be 10.8 TB.

However, maximum port traffic generally runs 80-90% of maximum capacity. This 10-20% overhead includes bandwidth used by the communication protocol and transactions at other hardware and software layers of network communication.

So, when an article or report asserts that consumer demand for bandwidth is increasing, it refers to:

  • Demand for data, generally from the consumer including on-demand streaming media (YouTube, Netflix, Spotify), audio and video downloads (Amazon, iTunes, Bandcamp), gaming (World of Warcraft), voice over IP, and IPTV.
  • Consumer demand for higher mobile and fixed broadband data rates
  • Supplier demand for networks with greater capacity, servers with greater processing power, and more storage.

Three things currently drive bandwidth consumption:

  • 24/7 entertainment on demand
  • Increased image quality
  • 3G and 4G mobile internet usage

Read the rest of this entry »

Joe’s History of Jazz
Lesson 5A

There’s no real delineation between the decades. Those zero years are just easy markers.

In the early 50s, Miles Davis didn’t exactly drop out of the scene, but following his return from a 1949 tour of Paris, fell into heroin addiction. For about four years he performed a bit, recorded quite a lot, and “lived the life of a hustler” (Wikipedia’s phrase – I don’t know what this means in context, however). In the late 1980s I read a biography of Miles that suggested he played in a recording session with Billie Holiday during this period, but I’ve never identified what those recordings might have been. He finally quit cold turkey in 1954. While his work from the late 40s and early 50s (addiction or no) show him to be a musician of incredible talent and vision. I’d argue that from 1955’s first quintet sessions through to 1975’s Agharta and Pangaea live albums, Miles was the center around which everything new in jazz revolved/evolved. (Between 1975 and 1981 he recorded little and didn’t perform in public at all, due primarily to illness and exhaustion. Many of his recordings and performances after returning to the public eye are less innovative and very much of their time, but there are still some intriguing gems in that late work.)

In 1951 he signed with Prestige records and recorded with a revolving cast of musicians that often included Art Blakey on drums and Sonny Rollins on tenor sax. Blakey later led the Jazz Messengers and Rollins led his own bands from 1957 onward.

Harold Arlen’s It’s Only a Paper Moon, from 1951’s Dig with Rollins was a hit in the 40s for Nat King Cole. While Miles’ lines hew to Cole’s vocal version, we get long improvisatory solos from Rollins and Davis.

On the subject of improvisation, in a recent interview with the All About Jazz web site, Kawabata Makoto of the Japanese psychedelic collective Acid Mothers Temple had this to say:

 AAJ: How do you go about staying creative as a musician? What inspires you to play?

 KM: I believe I haven’t created any music. Always, my cosmos teaches me what I should play. I don’t need to be inspired by anybody. I just try to be the best radio tuner for my cosmic that gives me music all the time. I try to play with “self-annihilation.” Any personal, egoistical idea makes the pure music [I think there might be a translation error in that last sentence. -JS]. I have to play without any of my personality or my own ideas. So I’ve tried to be a better tuner to receive and replay— to recreate—this music for people. But if I add any of my ego—my personal ideas of this music—this pure music will be a different thing. For example, if a musician gets any new technique, they want to show it to other people. Then this musician tries to add this new technique to his music. But I believe music must be played without any musicians’ egos. Music must be played as pure!

 While this may apply to certain more recent schools of music than 50s era Miles, Makoto is not the only one to suggest that he is only a conduit for his virtuosity. John Coltrane made similar assertions. It’s worth keeping in mind as we delve into the improvisational nature of jazz as the form moves on from 3-minute recordings to longer forms.

Bluing was recorded at one of two 1951 sessions from which the Dig album was compiled, though originally released as part of the Blue Period 10” album (along with Blue Room and Out of the Blue). At almost ten minutes long, Miles and Rollins both take the space to get into this Davis composition. Rollins’ tenor sax solo starts at about the 4 minute mark. He and Miles alternate for a bit before Jackie McLean’s alto comes in at about 6 minutes. Each one takes a route around the theme before Miles takes it back around the 8th minute. He finally restates the theme, introduced by Walter Bishop’s piano in the opening, in the piece’s closing bars.

Smooch, recorded in 1953 and released on Blue Haze is notable, again, for the line-up. Charles Mingus (who usually plays bass, but plays piano on this track) would soon record a string of influential albums starting with Mingus Ah Um in ’59. Drummer Max Roach, who founded the Debut record label together with Mingus in ’52 ,continued to record and perform with figures including Duke Ellington (1962’s Money Jungle, also with Mingus). Bassist Percy Heath and pianist John Lewis (not on this track, but on the rest of Blue Haze) had co-founded the Modern Jazz Quartet (usually abbreviated MJQ) the previous year and would continue to perform and record under that moniker on and off until the early 1990s.

Around the same time as the Blue Haze recordings, Dizzie Gillespie, Charlie Parker, Mingus, Roach, and pianist Bud Powell released Jazz at Massey Hall, Toronto. The show is remarkable for a number of reasons; one is that it was the last time Gillespie and Parker shared a stage. I’ve included a smoking rendition of Gillespie’s A Night in Tunisia (which you heard first back one of the 1940s entries). Again, we get extended solos from many of the participants – Powell’s is particularly tasty. I’d like to be able to point to the interplay between Powell and Mingus, but in the original release of the album, the bass was overdubbed because it had been too low in the mix. A later reissue removed the overdubbing. I’m pretty sure the one in the Spotify playlist is an overdubbed version.

Django, a Lewis composition and early MJQ recording, is a tribute to Django Reinhardt who passed away in 1953. Despite having no guitar, it has the feeling of some of Reinhardt’s tunes especially in the closing movement. I think it’s fair to say that this song progresses through distinct phases that might be called movements akin to those in a sonata. The song isn’t relaxed but has a distinct lack of hurry that’s very appealing.

Art Blakey, the drummer on the Dig sessions, first recorded under the name Art Blakey and the Jazz Messengers with the Café Bohemia albums recorded in 1955. Their rendition of the 1939 hit What’s New is almost a duet between Doug Watkins’ bass and Horace Silver’s piano – Blakey really only comes to the fore at the end of the song. On the other hand, the band’s rendition of Jimmy Van Heusen’s Like Someone in Love shows off each musician’s talent. Kenny Dorham’s trumpet work is well balanced against Hank Mobley’s sax. Dorham’s another journeyman who led his own small groups and was a sideman for many others. A few years later Mobley would join the Miles Davis Quintet for Someday My Prince Will Come (but I get ahead of myself).

Coming around the other way, we have John Coltrane whose tenor saxophone would grace the work of the first great Miles Davis Quintet from ’55 to ’57, was already recording in the early 50s. Between 1949 and 1951, Coltrane recorded several sessions with Dizzy Gillespie (including one which featured Dinah Washington, which I can’t find the Washington tracks on Spotify), but We Love to Boogie gives a taste of the power he was already showing pretty early in his career. The swinging Used to Be Duke, is from a 1954 stint with Johnny Hodges (an alto sax player who worked with Ellington in the 30s and participated in that great Benny Goodman show at Carnegie Hall). Miles admired Coltrane for, among other things his ability to play both loud and fast, while maintaining complete control of the instrument. You get a taste of that in both of these tracks.

There’s more to say about Coltrane and the other people who played with Miles during this very rich period. In a couple of massive sessions in 1956, Miles and Coltrane, pianist Red Garland, bassist Paul Chambers, and drummer Philly Joe Jones would record enough material for four albums, enough to fulfil Davis’ contract with Prestige and allow him to jump to Columbia Records in ’57.

Next up, however, we’ll visit Billie Holiday’s later work.

Lee Konitz, Florian Weber, Vivienne Aerts
Hooglandsekerk, Leiden 25 January 2014.


I’d been looking forward to this show since seeing the listing a few weeks ago. Konitz is one of only two surviving members of the Birth of the Cool sessions/gigs arranged by Miles Davis and Gil Evans. His two accompanists, vocalist Vivienne Aerts and pianist Florian Weber played the first set, mostly originals, as a duo. Both artists are deft at improvisation. Weber’s piano lines are melodic and full, but almost always unpredictable. His influences seem to include the modern jazz of the early 50s and the solo work of artists like Keith Jarrett.

While Aerts is Dutch, she sings in English. Her phasing is gorgeous and her interplay with Weber was a joy to watch and to hear. When she scats, it’s obvious she’s studied Ella, but also obvious is that she’s well trained in using her voice as an instrument. (Not surprising – according to her web site, she currently studies at Berkelee School of Music.) I can imagine some complaining about her occasional difficulties with English pronunciation, but such complaint is churlish given her impressive skills and the undeniable joy she exudes in singing.

His hair didn't look this good yesterday.After a break, Konitz and Weber took the stage. At age 87, he still has some serious chops. Early in the set, he marred otherwise interesting and intriguing performances of I’ll Remember April and Darn that Dream by blowing air through his lips at the end of each one. After those songs, though, his embouchure was much stronger. Nonetheless, Darn That Dream was an especial treat for me, as I know it well from its closing spot on the aforementioned Birth of the Cool. What was most impressive about this set was how the musicians challenged one another to do new things. The two have performed and recorded together several times over the last few years and are obviously comfortable with the challenges of improvising on the same stage.

The show concluded with all three performers doing a beautiful extended take on Carmichael and Mercer’s Skylark. Konitz expressed that he hated microphones and Aerts took this in stride. (Note the difficulty in this given the Hooglandsekerk’s very high ceilings.) I was glad we had seats near the front, because she did a really wonderful job.

Joe’s History of Jazz
Lesson 4C

http://open.spotify.com/user/bishopjoey/playlist/5L3ySZDnsMcniMXfM0kfAV (Scroll down to Sarah Vaughan and Dizzy Gillespie’s version of Loverman.)

In the late 40s, vocal styles changed a bit from the big band-backed style of the pre-war years to something more compatible with bebop. That’s a broad generalization, but let’s go with it for a little bit. Sarah “Sassy” Vaughan, who had played with Earl Hines and Billy Eckstine during the early part of the decade struck out on her own. I’ve found some early recordings with Dizzy and Bird (including another version of Loverman). The thing to listen for with all the vocalists of this period, and possibly in jazz vocalisation in general is for the phrasing. How does the singer play her voice against the melody, both that provided by the instruments, and that in the song? In East of the Sun, listen to how Vaughan plays with the spacing of the words (at 1 minute 20) just before Dizzy’s solo.

I’ve included her version of Nat King Cole’s Nature Boy. What’s interesting about it is that due to another musicians’ strike, she recorded with a vocal choir rather than instrumental accompaniment. In the late 40s, Sassy signed with Columbia and had both critical and commercial successes including with this sweet version of Black Coffee, though Columbia pushed her away from jazz and more towards pop. This was common for the label – Billie Holiday’s earliest Columbia work features angel choirs as does some of Aretha Franklin’s pre-Atlantic work in the early 60s.

Ella Fitzgerald, who had been recording since the 1930s (both ‘pop fluff’ as her 1966 NY Times obituary noted), added scat singing to her style in the mid 40s, in response to bebop’s influence. Scat is primarily wordless vocal improvisation, but the singer must handle it deftly or risk losing the audience to what can come across as nonsense. Cab Calloway and Slim Gaillard generally used scat to humorous effect. I’ve added Slim’s Puerto Vootie to the playlist for a reference, though I’m not sure how much of the song is actual Spanish, and how much is Latin-tinged scat. For her more straight-ahead style, listen to what Ella does on this arrangement of I’m Beginning to See the Light with the Ink Spots. Ella’s My Baby Likes To Bebop has that sense of humour from the origins of scat, but one could argue that what she does on this recording of How High The Moon (she comes in at about 5 minutes 50) is straight-up improvisation. The thing to note is how she’s always in control – you can hear it as well on Flying Home. Her harmony with the other musicians doesn’t stray.

Billy Eckstine is a really interesting case – he toured with Earl Hines in the late 30s/early 40s before forming his own big band, but it was a bop big band and featured at various times Miles Davis, Dexter Gordon, Art Blakey, and Dizzy Gillespie, among others. He played trumpet (Opus X), but was primarily a vocalist, and later focused on ballads. You can hear both sides on two 1946 tracks, Oo Bop Sh’bam and Prisoner of Love. Listen to Blue Moon and You’re All I Need (a duet with Vaughan) to get how beautiful his tenor was.

Another balladeer who started out in the jazz realm was Nathaniel Adams Coles, better known as Nat King Cole. Born in Alabama in 1919 and raised in Chicago, he studied piano, including jazz, gospel, and classical music. He landed in LA in the late 30s, after touring with a Eubie Blake revue and decided to stay. There he formed the King Cole Swingers, later the Nat King Cole Trio, an instrumental combo to which Cole later added his vocal talents. His piano style influenced later musicians including Oscar Peterson, Art Tatum, and Ray Charles. Peterson, also a pianist by trade, later recorded a beautiful album of vocals associated with Cole called With Respect to Nat. The Trio signed with Capitol records in 1943 and had its first hit with Straighten Up and Fly Right.

Next up: More Bop, More Blues.

My friend Renée writes some beautiful, achingly personal posts to Facebook about music. Usually opera, but other things as well. I asked if I could share this one here. A note about her – Despite the nose ring, and green hair she mentions (and being well tattooed as well), at the time Renée was the very capable classical music buyer for Tower Records on Castro Street.

I hope she will allow me to share more.

3 November at 09:31 ·
Sometimes you never know. I have watched a hummingbird fly backward and wanted to cry. You never know where another person may be. In the depths of thought,passion, sorrow…we know so little about a stranger.
At Stow Lake in Golden Gate park years ago,watching the ducks and lovers in rowboats, an older woman ( I was in my early twenties), completely in black, maybe 45, caught my eye. I wanted to know her… I needed to. How badly she interested me.
I joined her on the bench.
I did not speak.
Not wanting to intrude on wherever she had gone in her head.
Couples kissed , ducks honked, the boats were few and serene.
“What are you thinking about?” I asked her out of nowhere, not looking at her, I stared straight ahead as if still interested in the lake activity.
She did not answer me.
I did not respond either. I assumed I frightened her. Green hair, leather jacket, nose ring etc. I remained silent on the bench.
Oars splashed in the water…laughter echoed.
“Mahler,” she said.
I am sure she assumed that sounded Greek to me, but I know Mahler a bit, a little bit.
I smiled at her and asked “his 7th symphony?” as it is water themed.
“No.”
Silence.
And more silence.
“Kindertotenlieder” she said, she whispered.
We sat, not another word spoken.
Kindertotenlieder is a song cycle Mahler composed based on the death of children. Mahler later lost his daughter.
Sitting beside her, I could feel it, almost touch it, her thoughts, how they weighed on her. How lost she had become in them. Vivid only to her mind’s eye.
We never spoke again. But sat. I stayed until she left. How could I not?

http://en.wikipedia.org/wiki/Kindertotenlieder