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=====   COMP2720   =====   Semester 2, 2006   =====   Lab sheet  =====
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Student name: Dean Dal Broi
Student Uni ID: u4222206
Lab goup: Wed 10-12
Tutor: Peter Christen
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Lab number: 3
Date: 30/8/06
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Have downloaded all the required files for the lab. Moving onto part 1

Part 1.

Q1. Have run the normalise function on the 2 required sound files to 
find that it increases the sound volume level slightly. This was 
evident as the sound wave was increased to the maximum level in 
mediatools sound viewer.

Q2. However if I choose a 16 bit(2byte) sound file such as gotmail2.wav
I find that the sound is clipped. However if I change the amplification 
variable to the following it will work for that sound:

amplification = 127.0 / largest

Q3. Have run the playBackward function on some sounds and have found 
that it works as expected.

Q4. Have created the normaliseBackward function which call upon 
normailse and playBackward to achive its purpose. The function code is
as follows:

def normaliseBackward(filename):
  backwardsound = playBackward(filename) #reverse the sound
  normalise(backwardsound) #normalise the sound

  return backwardsound  #return the sound

Part 2.

I approached this problem using a top down design. I knew the program 
would take a sound, a starting point and an end point. I first 
calculated my start and end samples from the given start and end points
I then made an empty sound to the correct length using the start and
end points.

After that I set up a loop to copy the samples in the given sound that
were between the start and end samples into the empty sound. I then 
simply played that sound (as required) and then returned it at the end
of the function.

Part 3.

I created the sound collage function using both the normalise and 
playSection functions. I designed the function to take in 3 sounds
, normalise them and then take snips from them using playSection which
I renamed to getSection as I removed the 'Play' feature. Then all the 
sound snips were added to an empty sound using 3 separate loops. I then
play that sound and got the function to return it.



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