I'm accessing EF from WCF as middle tier and providing the service reference to ASP.NET MVC 3.
4.1 sound system without middle code#
To name the other notes, the notes on the black piano keys, you have to use a sharp or flat sign.I am using SQL Azure as database with code first technique of Entity framework 4.1. The eighth note would, of course, be the next A, beginning the next octave. Only seven letter names are used to name notes: A, B, C, D, E, F, and G. These are the diatonic scales, and they are the basis of most Western music. Add the first note of the next octave, so that you have that a "complete"-sounding scale ("do-re-mi-fa-so-la-ti" and then "do" again), and you have the eight notes of the octave. You may be thinking "OK, that's twelve notes that still has nothing to do with the number eight", but out of those twelve notes, only seven are used in any particular major or minor scale. (Please see Major Keys and Scales, Minor Keys and Scales, and Scales that aren’t Major or Minor for more about this.) Other musical traditions - traditional Chinese music for example - have divided the octave differently and so they use different scales. If you play all twelve of these notes within one octave you are playing a chromatic scale. In the Western musical tradition - which includes most familiar music from Europe and the Americas - the octave is divided up into twelve equally spaced notes. The people in different musical traditions have different ideas about what notes they think sound best together. Octaves aren't the only notes that sound good together.
The octave was named by musicians who were more interested in how octaves are divided into scales, than in how their frequencies are related. It seems an odd name for a frequency that is two times, not eight times, higher. The word "octave" comes from a Latin root meaning "eight".
(For more discussion of how notes are related because of their frequencies, see The Harmonic Series, Standing Waves and Musical Instruments, and Standing Waves and Wind Instruments.) A note that is one (or more) octaves higher or lower than an "F sharp" will also be an "F sharp". A note that is an octave higher or lower than a note named "C natural" will also be named "C natural". Notes that are one octave apart are so closely related to each other that musicians give them the same name. Any note that is twice the frequency of another note is one octave higher. They are just singing them one octave higher.
These two frequencies fit so well together that it sounds like the women are singing the same notes as the men, in the same key. That means their note has exactly two waves for each one wave that the men's note has. Instead they sing notes that are exactly double the frequency that the men are singing. They can't sing where the men are singing that's too low for their voices. Nobody is singing harmony they are all singing the same pitch - the same frequency - for each note. Imagine a few men are singing a song together. (For example, musicians call the note with frequency "440 vibrations per second" an "A".)īut to see where octaves come from, let's talk about frequencies a little more. And instead of numbers, they give the notes names, like "C". So when musicians talk about how high or low a note sounds, they usually don't talk about frequency they talk about the note's pitch. A sound that has a shorter wavelength has a higher frequency and a higher pitch.īut people have been making music and talking about music since long before we knew that sounds were waves with frequencies.