'প্রযুক্তিতে নতুনের ছোঁয়া': Exclusive

Copyright Free Audio Tracks

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Sometimes you need copyright free audio track for your video clip or other tutorial videos for making your Youtube videos, but unfortunately, you are not allowed to used copyright content for making your Youtube video.In this purpose, you can use this copyright free audio track, which means if you use this audio track Youtube will not be able to claim you to violate copyright law. 
 
Now I'm given you some most popular Youtube channel for copyright free audio tracks. 
 1) <a href="https://www.youtube.com/user/NoCopyrightSounds" target="_blank">NCS- NoCopyrightSounds</a>
 
<iframe width="560" height="315" src="https://www.youtube.com/embed/2UeMLPCL1Cs?list=PLRBp0Fe2GpgmsW46rJyudVFlY6IYjFBIK" frameborder="0" allowfullscreen></iframe>
 
 
<a href="https://www.youtube.com/channel/UCht8qITGkBvXKsR1Byln-wA" target="_blank">2) Audio Library – No Copyright Music</a> 
  
 
<iframe width="560" height="315" src="https://www.youtube.com/embed/odCWcV6Jv90?list=PLzCxunOM5WFI6sgbAppnSgLQxxNg_d10L" frameborder="0" allowfullscreen></iframe>
 
 
note: before use, those tracks must read carefully their Licence.</div>

Copyright Free Audio Tracks

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Amazing Water & Sound Experiment #2

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The effect that you are seeing can't be seen with the naked eye. The effect only works through the camera. However, there is a version of the project you can do where the effect would be visible with the naked eye. For that project, you'd have to use a strobe light. 
 
For this project you'll need: 
 
A powered speaker 
Water source 
Soft rubber hose 
Tone generating software 
24 fps camera 
Tape. 
 
Run the rubber hose down past the speaker so that the hose touches the speaker. Leave about 1 or 2 inches of the hose hanging past the bottom of the speaker. Secure the hose to the speaker with tape or whatever works best for you. The goal is to make sure the hose is touching the actual speaker so that when the speaker produces sound (vibrates) it will vibrate the hose. 
 
Set up your camera and switch it to 24 fps. The higher the shutter speed the better the results. But also keep in the mind that the higher your shutter speed, the more light you need. Run an audio cable from your computer to the speaker. Set your tone generating software to 24hz and hit play.Turn on the water. Now look through the camera and watch the magic begin. If you want the water to look like it's moving backward set the  
frequency to 23hz. If you want to look like it's moving forward in slow motion set it to 25hz.</div>