acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
README.md (1495B)
      1 # Music player demo
      2 
      3 ## Overview
      4 The music player demo shows what kind of modern, smartphone-like user interfaces can be created on LVGL. It works the best with display with 480x272 or 272x480 resolution.
      5 
      6 
      7 ![Music player demo with LVGL embedded GUI library](https://github.com/lvgl/lvgl/tree/master/demos/music/screenshot1.gif?raw=true)
      8 
      9 ## Run the demo
     10 - In `lv_conf.h` or equivalent places set `LV_USE_DEMO_MUSIC 1`
     11 - With `LV_DEMO_MUSIC_AUTO_PLAY` enabled a ~60 sec demo will be played.
     12 - After `lv_init()` and initializing the drivers call `lv_demo_music()`
     13 
     14 ## How the spectrum animation works
     15 - `assets/spectrum.py` creates an array of spectrum values from a music. 4 band are created with 33 samples/sec: bass, bass-mid, mid, mid-treble.
     16 - The spectrum meter UI does the followings:
     17 	- Zoom the album cover proportionality to the current bass value
     18 	- Display the 4 bands on the left side of a circle by default at 0°, 45°, 90°, 135°
     19 	- Add extra bars next to the "main bars" with a cosine shape. Add more bars for the lower bands.
     20 	- If there is a large enough bass, add a random offset to the position of the bars. E.g. start from 63° instead of 0°. (bars greater than 180° start again from 0°)
     21 	- If there is no bass, add 1 to the offset of the bars (it creates a "walking" effect)
     22 	- Mirror the bars to the right side of the circle
     23 	
     24 ## Using spectrum.py
     25 - install `librosa` with `pip3 install librosa`	
     26 - run `python sectrum.py my_file.mp3`
     27 - see the result in `spectrum.h`