Sound on MATLAB By Eliza Cranston Sound wave

Sound on MATLAB By: Eliza Cranston

§ Sound wave encoded as numerical samples in continues sequence § (CD) 16 bit sample depth over 44. 1 thousand samples per What is Digital Sound? second § Sound of an analog electrical signal is converted with an analog-to-digital converter (ADC) § Using pulse-code modulation. § Signal can then be recorded, edited, modified, and copied using digital audio workstation

What does this look like on the computer?

§ Changing the speed of the playback affects frequency Changing speed and pitch § Reducing speed=lower pitch § Increasing speed=higher

MATLAB

§ Use link to convert You. Tube video to mp 3 file § https: //www. flvto. biz/youtube-to-mp 3/ § Retrieve song from file into program § Observe graphs for each speed § Now adjust number to similar digits to see how it affects Homework speed § What do you notice when you change make the slow speed an even smaller number? § Fast speed even bigger? § Record observations

§ https: //en. wikipedia. org/wiki/Digital_audio § https: //manual. audacityteam. org/man/change_speed. html Sources § https: //www. google. com/search? q=audio+wavelength+gr aph&safe=strict&source=lnms&tbm=isch&sa=X&ved=0 ah UKEwi. T 4 JKFgfbf. Ah. VNn. OAKHew 8 DNc. Q_AUIDig. B&biw= 1440&bih=789#imgrc=IJBAVp. G 8 G 3 rr. AM: § https: //www. youtube. com/watch? v=ie 7 i. REc. YBPU