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In the fourth lecture, we obtained the frequencies of the notes in the middle scale of a piano. We then computed the CTFT of signal that would "sound" like a middle C and the CTFT of a signal that would "sound" like the next higher C. We also obtained the DTFT of a sampling of each of these signals (using the same sampling frequency). It was observed that, while the sampling of middle C yields a DT signal that also sounds like a middle C, the sampling of the higher C does not at all sound like a C. | In the fourth lecture, we obtained the frequencies of the notes in the middle scale of a piano. We then computed the CTFT of signal that would "sound" like a middle C and the CTFT of a signal that would "sound" like the next higher C. We also obtained the DTFT of a sampling of each of these signals (using the same sampling frequency). It was observed that, while the sampling of middle C yields a DT signal that also sounds like a middle C, the sampling of the higher C does not at all sound like a C. | ||
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| + | Relevant links: | ||
| + | *[[Homework_1_ECE301Fall2008mboutin|ECE301 students playing music with MATLAB]]. | ||
Seems like students have little recollection of the sampling material from [[ECE301]]. We shall fix this! | Seems like students have little recollection of the sampling material from [[ECE301]]. We shall fix this! | ||
Latest revision as of 06:42, 1 September 2010
Lecture 4 Blog, ECE438 Fall 2010, Prof. Boutin
Monday August 30, 2010.
In the fourth lecture, we obtained the frequencies of the notes in the middle scale of a piano. We then computed the CTFT of signal that would "sound" like a middle C and the CTFT of a signal that would "sound" like the next higher C. We also obtained the DTFT of a sampling of each of these signals (using the same sampling frequency). It was observed that, while the sampling of middle C yields a DT signal that also sounds like a middle C, the sampling of the higher C does not at all sound like a C.
Relevant links:
Seems like students have little recollection of the sampling material from ECE301. We shall fix this!
Any comments/questions? Please write them below.
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