I was walking on a back country dirt road near Algonquin Park about 5 in the morning, very quiet. Suddenly lightning hit a tree about 75 feet away and a large branch was split partly off the trunk.
To re-create the sound I heard, you could try the following. For best results you will need access to a Cooper Time Cube device. For secondary results you could use a vacuum cleaner hose.
You will be making a large "pop" sound, such as you might by using a finger in your mouth like kids do, but producing a much bigger sound. The Time Cube type of reverberation will lengthen the sound and give it the multi-hollow reverberation similar to what you hear by listening to things through a vacuum cleaner hose.
Obtain a large rubber stopper for laboratory apparatus and a 2 foot (or so) length of straight stiff ABS pipe. The stopper has to tightly fit inside the pipe. Drill a hole through the stopper, fit a bolt through it and attach some light cable to the bolt.
Clamp the pipe vertically, spray WD40 into the pipe, covering every bit of interior surface. Feed the cable down through the pipe and insert the stopper into the top of the pipe. Close the top of the pipe with an abs cap and cover the seam with duct tape. Attach a cement block to the cable at the bottom of the pipe.
- Start recording.
- Drop the block onto a pillow.
- If the stopper won't travel, shorten the pipe.
- If the sound is too deep, shorten the pipe.
- Repeat procedure with shorter lengths of pipe for experiment.
Play the sound through the Cube or through a vacuum cleaner hose. Multi-hollow reverberation should extend for about 2 seconds.
That should take care of the "CRACK" sound.
There was no sound of the lightning striking the tree, only the CRACK of the air column and the Splitting sound of the large branch as it peeled partly off the trunk.
In place of the tree branch, you might use the sound of objects being knocked flying. A pile of tin cans being knocked down a cement incline might demonstrate this effect.
This is a bit of work. If successful, you will achieve some originality.