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The Blank “Effect 2” Subsystem

Copying a block from the echo subsystem

Double click on the “ Effect 1” subsystem. Cut-and-paste a copy of the echo block as follows: while left-clicking the mouse, mark the area to be copied.

Outlining the Block to be Copied

Release the left button on the mouse.

Block to be Copied is Marked

From pull-down menu, select Edit ->Copy (or Ctrl + C)

Blocks dropped onto effect 2 subsystem

Return to the “Effect 2” subsystem and Edit ->Paste (Ctrl + V) into the model.

Blocks Dropped onto Subsystem

Flipping the blocks

The blocks are facing the wrong way. Turn them round using Format ->Flip Block.

Flipping the Blocks

Changing the integer delay for reverberation.

Because the sound goes round several times with reverberation, a shorter delay time can be used. Here the delay time is 0.1 seconds.

Delay Time for Reverberation

Set the “Number of delays” to 800 then click on “OK”.

Completing the reverberation subsystem

Connect the blocks as shown below. Change the title to “Reverberation Subsystem”.

The Completed Reverberation Subsystem

Returning to the parent system

From the Toolbar, select the “Up Arrow” icon. This returns you to the next higher level.

Returning to the Parent System

The improved echo subsystem

The final subsystem to be implemented will be “Improved Echo”. This is based on the “Echo” subsystem, but with several delay paths.

The complete improved echo subsystem

Double click on the “Effect 3” subsystem box. The required components are shown below.

The Improved Echo Subsystem

Implementing the improved echo subsystem

You should now have enough knowledge to implement this subsystem block without further assistance. This time you are on your own!

Building the model

Select Tools ->Real-Time Workshop ->Build Model.

Building the Model

Running the model

Microphone straight through to loudspeakers

To check out the microphone and loudspeakers, set the DIP switches on the C6713 DSK as follows:

Switch Position 0

The microphone is fed directly to the loudspeakers without any digital signal processing.

Switch position for echo

To run the “Echo” subsystem, set the DIP switch to 1.

Switch Position 1 for Echo

Switch position for reverberation

To run the “Reverberation” subsystem, set the DIP switch to 2.

Switch Position 2 for Reverberation

Switch position for improved echo

To run the “Improved Echo” subsystem, set the DIP switch to 3.

Switch Position 3 for Improved Echo

Some things to try

Change the echo delay

Change the value of the “Integer Delay” block for echo. Listen to the effect of using short and long delays. Set the delay time to a large value and sing a round such as “Frere Jacques” or “Row, Row, Row your Boat”.

Change the amount of reverberation gain

In the “Reverberation Subsystem” block, change the “Gain” from 0.8 to higher and lower values. Notice how the system can become unstable if the gain is too large.

Modify the improved echo subsystem

In the “Improved Echo Subsystem”, you may wish to experiment with the number of delay elements, the delay times and the amounts of gain. Try to make the echo as realistic as possible.

Create your own subsystem

Add your own subsystem block and add your own signal processing. You might want to design a subsystem with both echo and reverberation.

MATLAB and Simulink are registered trademarks of The MathWorks, Inc. See www.mathworks.com/trademarks for a list of additional trademarks. Other product or brand names may be trademarks or registered trademarks of their respective holders.

Questions & Answers

I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
How can I make nanorobot?
Lily
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Source:  OpenStax, From matlab and simulink to real-time with ti dsp's. OpenStax CNX. Jun 08, 2009 Download for free at http://cnx.org/content/col10713/1.1
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