Wanted to try this for a long time but wasn't finding any perfect challenge for it. Finally come double take and it does fit in this challenge.
This came out after several attempts.
How it was done:
1. Speakers setup with black background and black cloth on bottom. Camera on the tripod and Bulb Mode.
2. LED flashlight (got it from Walmart) with 3 colored lenses. So flashlight has 3 in built colors - Red, Blue, Green.
3. Wrapped a paper tissue around the led flash light to create the brad lights (dreamy effect). Did this for both colors, red and blue for each speaker.
4. Removed the paper tissue and then again painted from both colors to get the sharp streaks.
5. After around 20 attempts, got it the way i wanted.