Guitar Fretboard Physics

Since we were talking about guitars and how their pickups work, the Clear Science staff wanted to point out that all kinds of physics can be illustrated with a guitar. Take for example the vibration of the strings, which produces the notes. The strings are held stationary two places: at the nut, shown by the blue line, and at the bridge, shown by the grey line.

When you pluck a string, you set up a standing wave, with stationary nodes at the nut and bridge. When you fret the string (i.e. push it down with your finger), you change the distance between these nodes, and it changes the note.

The 12th fret is exactly halfway along the string, and when fretted there will produce a note one octave higher than the unfretted string. (For example, the top string is generally an E, and the note at the 12th fret is a higher E.) The 7th fret is 2/3 of the way along the string, and the 5th fret is 3/4. These special frets are usually marked with pearling or with some dots.

via: http://clearscience.tumblr.com/post/3744206682/since-we-were-talking-about-guitars-and-how-their

Guitar Pickups and Induction

Pickups are the strips you see under the strings on an electric guitar. They turn the physical vibration of the strings into an electrical signal. On an acoustic guitar, you hear the sound waves created by the strings’ vibration. On an electric guitar, you hear the electrical signal after it’s been run through an amplifier and comes out of a speaker. (Although the Clear Science art director couldn’t have an amp when he was a kid, so would put his ear on the horn of the guitar and hear the sound waves traveling through the solid guitar body.)

Guitar pickups work by electromagnetic induction, so let’s talk about what that is. If you have a coil of wire (a copper coil is illustrated above), a magnet passing through the coil will induce an electromotive force (EMF) in the coil. This EMF will cause an electric current to flow. (Incidentally, this is also how electric generators work.)

This concept is called Faraday’s law of induction, discovered by Michael Faraday. The EMF is equal to the time rate of change of the magnetic flux through the coil. Magnetic flux means the amount of magnetic field per area per time. Said plainer, this means changes in the magnetic field will cause some kind of current.

via: http://clearscience.tumblr.com/post/3564812865/pickups-are-the-strips-you-see-under-the-strings

Bater uns ovos

Conferência sobre a história da guitarra com Jorge Casimiro Silva

Clube Literário do Porto:

Dia 12 | Terça-feira
Auditório, 21h30

Borlas #5

O Bisonte - Ala
Rock

Afinal...

parece que há hip-hop fixe.



O álbum é de 2000, e vale a pena.

Black Ranger

A-1, WooStaar and Sac Masta Collaborate to bring you "After School Special". All Of your favorite 90's shows remixed with A-1 Providing the rhymes.
Classic shows like Pokemon, All That, Power Rangers, Reading Rainbow and More!

bandcamp: download.a-1music.com/track/black-ranger

Gomo, M.D.

Olha aqui este shoop que eu inventei:

Como é que eu só ouvi falar disto agora?

Uma banda que reúne duas das melhores (e mais... hm... voluptuosas?) vozes femininas portuguesas? Com o baixista de Orelha? Até nos esquecemos que têm lá o gajo dos Delfins.

Movimento - Novo projecto de Gomo, Selma Uamusse (Wraygunn), Marta Ren (ex-Sloppy Joe e Bombazines) e Miguel Ângelo (ex-Delfins) (...) produção e direcção musical de Francisco Rebelo (Cool Hipnoise, Cacique 97 e Cais Sodré Funk Connection) e do (...)João Cabrita (...) revisita uma série de clássicos nacionais dos anos 60 e 70, de “E depois do adeus” (Paulo de Carvalho) a “Verão” e “Flor sem tempo” (Fernando Mendes), de “Começar de novo” (Simone de Oliveira) a “O louco” (Conjunto Académico João Paulo) (...) numa abordagem de inspiração Soul clássica, mas carregada de sintomas de modernidade.

O disco sai este mês, e haverá concertos com uma orquestra de 12 elementos, incluindo, como sempre deveria ser, um belo naipe de sopros.

Há amostras no myspace.

Depois de os ver no 5 para a Meia-Noite

Chego à conclusão que os Gift querem apenas que a gente os ajude a pagar as férias de verão na Índia.