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TamTam - Part 2: synthLab

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Subido el 16 de octubre de 2007 por EducaMadrid

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This is a video demonstration of TamTam Synthlab on the OLPC XO computer.

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Welcome to our second video. This will be a demonstration tutorial on SynthLab, 00:00:00
which is the second part of the TamTam suite of music applications for the 00:00:05
OLPC XO computer. To start SynthLab, you start it from MiniTamTam and you 00:00:10
select one of the four icons that correspond to the four slots that you 00:00:16
have available in MiniTamTam to play SynthLab made sounds. So you select one 00:00:22
of them and hit the small red button at the top and this will open the SynthLab 00:00:28
interface. SynthLab was conceived as an educational activity. It is meant to 00:00:33
provide an environment to explore the physics of sound, to introduce kids to 00:00:38
logic of circuitry, and to give concrete example of applied mathematics as it 00:00:43
relates to sound. So the SynthLab interface consists of five different 00:00:48
parts. There's a work table over here where we will do our circuits. There's a 00:00:52
bank of modules. There are three types of modules. There are sources, the green 00:00:57
boxes over here. There are processors, which are the blue boxes, and there are 00:01:03
controllers, which are the yellow boxes. We have on the right hand side of the 00:01:07
screen a bank of ten presets. Now these presets are useful because they show us 00:01:12
different examples of circuits that can be done or can be built with SynthLab 00:01:18
and they work right out of the box. And then we have the two boxes at the 00:01:24
bottom over here. This slider gives you the possibility of changing the duration 00:01:28
of the sound that you are going to do. For instance, if I go in the same example 00:01:34
I do a... it'll be shorter and if I go over here it will be much longer. And the last 00:01:38
panel over here gives you tools that allow you to save the patches that you 00:01:47
have done or to call them back. The red button allows you to save the sounds 00:01:51
that you have made so that you can use them in Mini TamTam. And then there's a 00:01:56
little garbage can over here that allows you to reinitialize the work table over 00:02:01
here and just clears it out, puts everything back in its places, and you're 00:02:05
ready to begin a sound building session. The three different types of modules that 00:02:09
we have in SynthLab, they serve quite a different purpose. These sources are 00:02:14
essentially what make the sound and then you can hear it. The filters or 00:02:20
processors that are over here, the blue boxes, will modify that sound. So 00:02:26
typically you will take a source and then you will put it into a processor 00:02:30
and be able to alter the quality of the sound. The controllers are things that 00:02:35
will allow you to control the behavior of the sound in time. So it means that 00:02:41
for instance, a controller will be applied to one of the inputs of the 00:02:48
sources to give it, for instance, a vibrato or a tremolo or to change some 00:02:53
other aspects of the timbre. You can also use controllers to regulate how the 00:02:59
filters or processors will be modifying the sound. So a typical session of SynthLab 00:03:04
will involve first choosing a sound source. The sound sources are the 00:03:11
green icons over here and I put them on the table by clicking on one of them and 00:03:16
dragging it onto the table like this. Now sound generators are of different types 00:03:22
and you can have access to the parameters by right-clicking on the icon 00:03:28
and this will bring up the various types of sound source that you can have and 00:03:34
the various parameters that control what they will actually do. And you can close 00:03:39
by clicking on the X over here. So in order to connect the units together we 00:03:44
simply click on the output of a unit, in this case a source, and we click on the 00:03:49
input of a destination which is the loudspeaker. So this will give us a 00:03:56
connection. As soon as we have a connection we can start playing on the 00:04:00
keyboard. So this is going to be a very boring sound because it's a straight 00:04:04
source. So let's right-click on the source and take a look at what we can do. 00:04:10
Now these controls can be actually controlled by controllers over here. So 00:04:14
let's close this and we'll connect one of the controllers to this slider over 00:04:20
here, the modulation index. Now they're all different for the different types of 00:04:25
sources that we have. So let's close this and we're going to take a controller and 00:04:30
bring it over here. Now this is an envelope generator. We're going to open it and yes 00:04:36
this is an envelope. It has a rapid decay over here and we will be able to apply 00:04:42
that time variant function to the modulation index. So we're going to do 00:04:47
the same type of connection by clicking once over here and on the third input 00:04:52
over here to get the connection. So the connection is now made and the sound is 00:04:57
going to be like this. 00:05:04
Much more interesting. So we can vary a few of the parameters over here to get a 00:05:09
different sound. This is going to make it higher. 00:05:16
Perhaps it's more interesting this way. That's interesting. We have a good 00:05:21
timbral change over here. So I'm going to close this and now what we're going to do 00:05:27
is we're going to put a sound processor between the source and the output. So 00:05:31
we're going to get one of the blue boxes over here. We're going to connect the 00:05:38
output of the source to the input of the processor and the output of the 00:05:42
processor to the loudspeaker. I'm going to delete this by this one over here. 00:05:47
We're going to delete by clicking on it once. So now we have a sound processor or 00:05:53
filter that we put on the output of the sound generator or source. So we're going 00:05:59
to right-click on the processor, open it, and now we have a harmonizer selected. So 00:06:03
let's see what that sounds like. So we have like two notes playing together now 00:06:10
because it doubles the note at a different pitch. So let's change the frequency over 00:06:17
here. We're going to put it higher or lower. 00:06:24
Or we can try a different type of processor. We're going to try the delay 00:06:32
over here. So I'm going to put a little resonator in fact. So this adds a little 00:06:38
resonating frequency. I'm going to turn down the level a little bit. And there is our 00:06:48
circuit. So we're ready to play with it. 00:06:55
We can make it longer over here and we can put a final envelope on the 00:07:01
amplitude by right-clicking on the loudspeaker. We're going to give it a 00:07:09
nice little attack, a little release like this. Close this and see what this sounds like. 00:07:13
That's very nice. 00:07:20
We have a sound that we like. We're going to record it to Minitamtam by hitting 00:07:29
the red button over here. So it's going to wait for me to play and then record it. 00:07:34
Voila! Now we can close SynthLab and get back to Minitamtam and our sound should 00:07:44
be waiting for us in the slot over here. 00:07:52
There we go. It becomes a regular Minitamtam instrument that we can play 00:07:59
with the keyboard. So this concludes the SynthLab demonstration. I hope you 00:08:03
enjoyed it and stay tuned. We're going to have some more little tidbits for you in 00:08:07
the near future. Thank you! 00:08:11
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Idioma/s:
en
Autor/es:
One Laptop per Child Foundation
Subido por:
EducaMadrid
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
1440
Fecha:
16 de octubre de 2007 - 13:32
Visibilidad:
Público
Enlace Relacionado:
http://tamtam4olpc.wordpress.com
Duración:
08′ 14″
Relación de aspecto:
4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
Resolución:
480x360 píxeles
Tamaño:
19.69 MBytes

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