Fall 2006 Midterm 2 Review: Sound Coding
Post your questions here.
1.
def upDown():
source=makeSound(sound)
target=makeSound(sound)
targetIndex=1
half=(getLength(source)/2)+1
for sourceIndex in range(1,half):
value=getSampleValueAt(source,sourceIndex)
setSampleValueAt(target,targetIndex,value*2)
targetIndex=targetIndex+1
for sourceIndex in range(half,(getLength(source)+1):
value=getSampleValueAt(source,sourceIndex)
setSampleValueAt(target,targetIndex,int(value/2))
targetIndex=targetIndex+1
Don't forget to use code tags when you post your code! :) You have a few problems with this code, primarily in defining variables before you use them. 1.where do you define "value2" in the first for loop, or did you want value*2?2.where do you increase your targetIndex in the second loop?3.do you need to redefine value within the second loop? (hint, if you don't, you won't hear any sound)
4.Can you set a sample value to a sample that has a decimal place? (This deals with the division in the second loop) Amanda Bennett |
whats the difference between using "sourceIndex" and "for sample in range"?
2.
def splice():
source=makeSound(sound1)
target=makeSound(sound2)
r=getSamplingRate(source)
r2=getSamplingRate(target)
targetIndex=2*r2
for s in range (r,.5*r):
v=getSampleValueAt(source,s)
setSampleValueAt(target,targetIndex,v)
targetIndex=targetIndex+1
return target
3.
def move():
sound=makeSound(sound)
sound2=makeSound(sound)
r=getSamplingRate(sound)
targetIndex=2*r
for s in range(4*r,5r+1):
v=getSampleValueAt(sound,s)
setSampleValueAt(sound2,targetIndex,v)
targetIndex=targetIndex+1
return sound2
1.
def upDown (sound):
for i in range (1, getLength (sound)/2):
value=getSampleValueAt(sound, i)
value=value*2
setSampleValueAt(sound,i,value)
for i in range (getLength(sound)/2,getLength(sound)):
value=getSampleValueAt(sound, i)
value=value/2
setSampleValueAt(sound,i,value)
return sound
Stacy Schwaiger
3.
def changeSound(sound):
targetIndex=88200
for i in range(176400,220500):
value=getSampleValueAt(sound,i)
setSampleValueAt(sound,targetIndex,value)
targetIndex=targetIndex+1
return sound
Stacy Schwaiger
2.
def pasteSound(sourceSound, targetSound):
source=makeSound(sourceSound)
target=makeSound(targetSound)
targetIndex=44100
for s in range(22051,33075):
value=getSampleValueAt(source,s)
setSampleValueAt(target,targetIndex,value)
targetIndex=targetIndex+1
return target
Jeffrey Wells
How do you know what ranges to use for number two and three?
Here's the right answer to the third question - Bobby Mathew
def sound3(sound):
rate = getSamplingRate(sound)
start = rate*4
end = rate*5
targetindex = rate * 2
for index in range(start, end):
value = getSampleValueAt(sound,index)
setSampleValueAt(sound, targetindex, value)
targetindex = targetindex + 1
return sound
why did you multiply by 4 and 5 for the start and the end?
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