Signal and Systems
410687003
Midtetm introduction
![擷取.PNG](https://static.wixstatic.com/media/eeb1c9_e7097e92f57640258a5f146750501125~mv2.png/v1/fill/w_600,h_322,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/%E6%93%B7%E5%8F%96_PNG.png)
![擷取10.PNG](https://static.wixstatic.com/media/eeb1c9_09209164dbcf432cb03e8045ae994497~mv2.png/v1/fill/w_600,h_352,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/%E6%93%B7%E5%8F%9610_PNG.png)
There are five main functions in the music player.Which are playing songs ramdomly,playing songs by choosing the name in the menu,changing the frequency,volume accuracy to the fifth digit after the decimal point,playing music with echo,and changing backgrounds.Now,let's go
forward to look at these function one by one.
Functions
(1)random mode
When you press the random button,it will turn on and then when you press play button, the player will play music randomly in list below.Moreover,the string on the random button will change to the name of the song,and the original waveform , fourier transform waveform will be seen on the right.
![擷取1.PNG](https://static.wixstatic.com/media/eeb1c9_4823b2e603a94803a13720bc816e7abf~mv2.png/v1/fill/w_109,h_28,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/%E6%93%B7%E5%8F%961_PNG.png)
![擷取2.PNG](https://static.wixstatic.com/media/eeb1c9_6bb47d1113be4719859eca7e1c02e251~mv2.png/v1/fill/w_77,h_27,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/%E6%93%B7%E5%8F%962_PNG.png)
![擷取3.PNG](https://static.wixstatic.com/media/eeb1c9_d8d9192e47c34c1da4efa18f39a01e33~mv2.png/v1/fill/w_155,h_202,al_c,q_85,usm_0.66_1.00_0.01,blur_3,enc_auto/%E6%93%B7%E5%8F%963_PNG.png)
In random mode,press play or echo play and stop repeatly,you can listen to different songs.
(2)normal(list) mode
To be in this mode,make sure that the random button is off.Then you can go to the list and choose which song do you want to listen.
![擷取2.PNG](https://static.wixstatic.com/media/eeb1c9_6bb47d1113be4719859eca7e1c02e251~mv2.png/v1/fill/w_77,h_27,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/%E6%93%B7%E5%8F%962_PNG.png)
![擷取5.PNG](https://static.wixstatic.com/media/eeb1c9_7245e52ad8cf472aa999eec4c228d149~mv2.png/v1/fill/w_89,h_52,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/%E6%93%B7%E5%8F%965_PNG.png)
(3)volume&frequency settings
You can change value and frequency easily by moving the mouse.It can be accuracy to the fifth digit after the decimal point,but if you are lazy to adjust,you can click on the slidder,it will move 0.5 a time.
![擷取6.PNG](https://static.wixstatic.com/media/eeb1c9_f8dbad10199f4f3fa16e5da1d8c670b7~mv2.png/v1/fill/w_58,h_48,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/%E6%93%B7%E5%8F%966_PNG.png)
![擷取7.PNG](https://static.wixstatic.com/media/eeb1c9_1853025b65e6405e805fbe58d07f1a0a~mv2.png/v1/fill/w_60,h_50,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/%E6%93%B7%E5%8F%967_PNG.png)
![擷取11.PNG](https://static.wixstatic.com/media/eeb1c9_dcf8ccefe7df422ba3a06f44d8877d61~mv2.png/v1/fill/w_70,h_38,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/%E6%93%B7%E5%8F%9611_PNG.png)
(4)echo play
The echo play button is same as the normal play button,which can make echo sounds,make audience feels being in the concert.
![擷取9.PNG](https://static.wixstatic.com/media/eeb1c9_baacab81d48e45c8a483d49a9bbe0805~mv2.png/v1/fill/w_130,h_250,al_c,q_85,usm_0.66_1.00_0.01,blur_3,enc_auto/%E6%93%B7%E5%8F%969_PNG.png)
(5)background changing
Background images would be changed when playing different songs.
![擷取.PNG](https://static.wixstatic.com/media/eeb1c9_e7097e92f57640258a5f146750501125~mv2.png/v1/fill/w_60,h_32,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/%E6%93%B7%E5%8F%96_PNG.png)
Original background
![擷取8.PNG](https://static.wixstatic.com/media/eeb1c9_c5e9fb6d02424480a2575d312d937eb5~mv2.png/v1/fill/w_60,h_32,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/%E6%93%B7%E5%8F%968_PNG.png)
White Album 2-Closing Chapter ED 『優しい噓』
![擷取12.PNG](https://static.wixstatic.com/media/eeb1c9_cec2a255b3c244efbc6047715f3bd948~mv2.png/v1/fill/w_60,h_32,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/%E6%93%B7%E5%8F%9612_PNG.png)
CLANNAD OP メグメル
![擷取11.PNG](https://static.wixstatic.com/media/eeb1c9_dcf8ccefe7df422ba3a06f44d8877d61~mv2.png/v1/fill/w_60,h_32,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/%E6%93%B7%E5%8F%9611_PNG.png)
あの日見た花の名前を僕達はまだ知らないED secret base 〜君がくれたもの〜