What does the raw output mean?

[Femtofirst]

I am using a minidsp 8-channel microphone for running ODAS, and below is some raw output from terminal - I know the first part is the result of SSL and the second part is the result of SST, the 'x,y,z ' in SSL result indicates the 3d vector of sound sources in the space and the 'E' stands for energy, indicating the intensity of sound.

{
"timeStamp": 2351,
"src": [
{ "x": -0.500, "y": 0.162, "z": 0.851, "E": 0.268 },
{ "x": -0.564, "y": -0.097, "z": 0.820, "E": 0.159 },
{ "x": -0.199, "y": 0.274, "z": 0.941, "E": 0.131 },
{ "x": -0.906, "y": 0.420, "z": 0.059, "E": 0.105 }
]
}
{
"timeStamp": 2351,
"src": [
{ "id": 0, "tag": "", "x": 0.000, "y": 0.000, "z": 0.000, "activity": 0.000 },
{ "id": 34, "tag": "dynamic", "x": -0.458, "y": -0.807, "z": 0.374, "activity": 0.000 },
{ "id": 0, "tag": "", "x": 0.000, "y": 0.000, "z": 0.000, "activity": 0.000 },
{ "id": 0, "tag": "", "x": 0.000, "y": 0.000, "z": 0.000, "activity": 0.000 }
]
}

And I am wondering:

1. What do the "x,y,z" , the "ID" tag and the 'activity' in the SST result mean?
2. Why there are only 4 lines of output for each?
3. Which sound source is tracked in the result of SST? Is it the one with the highest energy?

[Femtofirst]

Ahh, figured it out. The ODAS paper is very helpful and explains very well: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9131248/