So you want the entire background to be redrawn on a bass drum hit?

That would be something like this.

1) Emit all particles at once, during one frame, at the beginning of each second, with a life of 1/25 of a second. So, if you have a frame rate of 25 and want 25 particles, that would be 25×25 = 625particles per second. This way you will have a comp where the background changes every frame. Precomp that moving all attributes.

You might want to consider at this point how many different background you actually need. Every second of footage gives you 25 different backgrounds. I would settle for 100, which would be 4 seconds — adjust precomp length accordingly.

2) Prerender that precomp. (You cannot time remap a Particular layer.)

3) Generate SoundKeys trigger output for your bass. Use 0-1 range and “instant” fall off.

4) Generate second output with same range with trigger set to 0-1 but with “none/integrate” fall-off. This way every bass hit will add to the previous value.

5) Time Remap the prerendered background footage layer. The following time remap code will use these two Soundkeys outputs but ignore cases where the output stays at 1 on consecutive frames. Also, if you’ve made the footage shorter, say 4 seconds, you will need an expression that gives you the modulus (remainder of division) of 4. That would be:

if(thisComp.layer("SoundKeys").effect("Sound Keys")("Output 1")==1){
n=time;
while (n