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Comments for Week of Feb. 16, 2004

Welcome to Week 7!


Questions, comments, criticisms, cheers, jeers, or any good jokes?


I know we were handed back our midterms on Friday, but I wasn't in class, so can I pick it up from my TA? Or in class?
Check with your lecturer – he has them right now. Mark Guzdial

so I'm reading chapter 5, the section about sound splicing, and I'm wondering why does there need to be an index? Is it kind of like a mirrorpoint but for sounds??
Excellent question! The index for the sounds is just like the sourceX and sourceY for pictures – it's the position marker in the sound. We need both a source and a target index for copying samples from one sound (array) to another. Mark Guzdial

YYYYYYYYYYYYYYYYYYYes!!!!!!! I actually got HW3 AND understand it AND did it by myself (and TAs)!!!!!!!!!! Yes!!!!!!!!
Where did the "add to the page" box go on the HW3 Questions page?

I've already finished the first exam! YAY!!!
You've seen how to increase the frequency of a sound by taking every other sample. One of the students in my breakout asked if it was possible to gradually speed up a sound so it starts out normal and gradually speeds up until it is at a target speed. It is possible, and it sounds pretty cool. The code itself is not very difficult. The code takes a sound and a target speed as input and returns the source file with the new sound. A simple algorithm changes the rate at which the source index is incremented based on the current source index. Thus, as the source index increase, the rate at which the source index increases speeds up. Because the sound will be shorted as a result of the increased speed, "0 value" samples are added over the old unedited sound left over from the original source. Speed Up Sound click to see the code and hear a sample. Please feel free to post comments, questions, or improvements.
Greg Leo

homework 3 is due at 5? right?
Yup. Mark Guzdial

Thank you so much to MARK GUZDIAL for all his help!


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