CSC231 Homework 6 2010

--D. Thiebaut 14:28, 27 October 2010 (UTC)

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The homework is due on Nov 3rd, at 11:59 p.m. + 1 minute. You can work in pairs on this assignment.

Introduction

• Figure out how to implement the "graphic" algorithm shown above:
  • The original sound is Sound 1 ("goodbye" )
  • you copy it once in a new buffer, in the same relative location
  • you copy it a second time, decreasing its amplitude and adding it to the new buffer, with an offset of about 1500.
  • you copy it a third time, decreasing its amplitude some more, and adding it to the new buffer, with an offset of about 3000.
  • you copy the new buffer back into the wav buffer, figure out its new length, and write the file back to disk under the name goodbye2.wav.
  • you listen to it and observe that there is now an echo! :-)

Requirements

• You should make sure that your program will work with sound files up to 100 KBytes in length.
• You can be assured that the sound files will always contain unsigned 8-bit samples.
• Make sure that your program uses the names goodbye.wav and goodbye2.wav as input and output files.
• Explain in your header how you manage the buffers you use to hold your file(s). In particular how you decide how large a buffer you need for the different operations.

Submission

Store your program in a file called hw6.asm and submit it as follows:

 submit hw6 hw6.asm