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Midterm Exam 2 Review Spring 2004: Rewrite the Splice

Comments, answers, and questions go here:

(Link back to Sp2004 Midterm 2 Review)

For part b, where it has "targetIndex = targetIndex + 1" in the original code, shouldn't it just be "targetIndex = targetIndex + 2", and for part c it should be "targetIndex = targetIndex + 0.5"?

i'm not sure about part a. could you reword it please?

In this loop:
  targetIndex=1         # targetIndex starts at the beginning
  for sourceIndex in range( 40327, 55770):  # Where the word "Test" is in the sound
    setSampleValueAt(target, targetIndex,  getSampleValueAt( source, sourceIndex))
    targetIndex = targetIndex + 1

It's sourceIndex that's in the for loop, and targetIndex that's incremented. Swap those, but still DO the exact same thing. The first line would be sourceIndex=40327. The for loop would be on targetIndex, and the range would start with 1, since that's what the above loop starts with. Now, fill in the rest. Mark Guzdial

I still do not understand what the question (a) is asking exactly. We went over this in the review session, and I understand the answer... So, are the codes doing the same thing, just doing it in a different manner?
If you understand the WHOLE CODE for parts b and c (and if you know that it is correct), PLEASE PLEASE PLEASE post it!
 def spliceTest():
   file = getMediaPath("thisisatest.wav")
   source = makeSound(file)
   target = makeSound(file)
   targetIndex = 1
   for sourceIndex in range(40327,55770):
     sourceSampleValue = getSampleValueAt(source,sourceIndex)
     setSampleValueAt(target,targetIndex,sourceSampleValue)
     targetIndex = targetIndex + 2
   play(target)
   return target

 def spliceTest():
    file = getMediaPath("thisisatest.wav")
    source = makeSound(file)
    target = makeSound(file)
    targetIndex = 1
    for sourceIndex in range(40327,55770):
      sourceSampleValue = getSampleValueAt(source,sourceIndex)
      setSampleValueAt(target,int(targetIndex),sourceSampleValue)
      targetIndex = targetIndex + 0.5
    play(target)
    return target




a)def spliceTest():

	file = r"C:\Documents and Settings\Mark Guzdial\My Documents\mediasources\thisisatest.wav"

	source = makeSound(file)

	target = makeSound(file)

	aourceIndex=40327 

	for targetIndex in range(1, 55770-40327):

		setSampleValueAt(target, targetIndex,  getSampleValueAt( source, sourceIndex))

		sourceIndex = Index + 1

	play(target)	

	return target

Amy Howard

I DONT UNDERSTAND A!!!
Amy's A and the original program on the Review do the exact same thing. Compare them and see how they handle sourceIndex and targetIndex differently. Mark Guzdial

a)
def spliceTest():
   file = r"C:\filehere"
   source = makeSound(file)
   target = makeSound(file)
   sourceIndex=1
   for targetIndex in range( 40327, 55770):
      setSampleValueAt(target, targetIndex, getSampleValueAt(source, sourceIndex))
      sourceIndex = sourceIndex + 1
   play (target)
   return target

And that's my answer folks...let me know if i'm wrong or if amy's right.
Thomas Sobeck


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