Continuing on from where we left off way too long ago, we shall talk about timbre, or more commonly called tone color. Timbre (pronouced tam-ber) is basically the characteristics that make any instrument sound the way it does. Think about it as if this would be the instrument's accent. Every language we speak has an accent to where it was created, and there is no difference with musical instruments. The major difference here is the science behind why it happens.
Looking on to why this happens, we have to get some what technical about how it works. The basic explanation is the sound wave itself has changed shapes, which then changes how we hear it. Think about the differences between the four basic sound waves: Sine/Cosine, Square, Triangle and Sawtooth. Each one has their own definite shape and sound very different. There is A LOT that is involved into explaining that, and if you are interested then click here to read what HyperPhysics.Edu have done on the topic. For those whom don't want all the details, there are two basics things to consider. The first way to analyze a sound wave is by analyzing the harmonic content of the sound, or how the overtones and harmonics are heard in relation to the primary sound wave. An organic sound wave (that being by a live instrument) is created by playing a primary frequency or fundamental pitch. That then triggers all the overtones, harmonics, and in the case of instruments with strings, similarly divided strings to play simultaneously. Sometimes these overtones and harmonics can be directly heard while other times aren't even recognizable. The second way is how the sound wave envelope is created. Every instruments has a certain way to make sound. For example, a cello normally has to bow a string. The energy to get started with the bow moving across the string helps define strings musicians because of the "lag" from the energy transfer. Compare to guitarist and pianist whom strike the string with their fingers, pick or by a hammer. The energy is transferred differently, and is creates a different sound. In case you are interested in hearing so, then check out this piece. It has played piano and bowed piano.
After all the scientific gibberish followed by a crazy videos, what does this all mean for a simple composer? Why should timbre matter this much in my piece?
Because it can change to context of your piece extremely. The best example I think I've ever seen are these two videos: Both of a song called "Raining Blood" by Slayer. This first one is the studio version of the song by Slayer (in case the video doesn't do this automatically, skip to around 0:30 to avoid the intro)
Now let's show what happens when you go from electric guitar to another guitar-like instrument and play the same song:
The differences are really staggering here. This is a bit of an extreme juxtaposition of the song but it does show what is possible. Another example I like to share (that is a little more socially accepted) is orchestrated version of Stairway to Heaven. This one is by Triple Door Cello Quartet
Finally, let's look at one from a classical example. While this isn't the best example I can think of, this one combines the past topics to express itself.
If you would like another example, listen to Stravinsky's Rite of Spring. He does a lot of things in terms of building timbres up and pushing the limits of the instruments and musicians. I hope this was worth the wait! I am really sorry about the delay on this one but between the convention (which I will share the videos once they're available to me) and being sick, I was loaded down. However, once we finish this series and then go into our next series: Explaining how all these topics and more convert into composing. Perhaps even some workshop like episodes and analysis. Also, if anyone is interested in listening to me break down music books and explain them differently then let me know! Thanks for reading!
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