It will not show any change, it’s only for excessive logging.
For the option fixed it create the processing buffer :srcChLayout: FL, FR, BL, BR, dstChLayout: FL, FR, FC, LFE, BL, BR, no matrix.
Then it create the sink buffer: srcChLayout: FL, FR, FC, LFE, BL, BR, dstChLayout: FL, FR, FC, LFE, BL, BR with the matrix:
m_rematrix: [0]: 1.0 0.0 0.0 0.0 0.0 0.0
m_rematrix: [1]: 0.0 1.0 0.0 0.0 0.0 0.0
m_rematrix: [2]: 0.0 0.0 0.0 1.0 0.0 0.0
m_rematrix: [3]: 0.0 0.0 1.0 0.0 0.0 0.0
m_rematrix: [4]: 0.0 0.0 0.0 0.0 1.0 0.0
m_rematrix: [5]: 0.0 0.0 0.0 0.0 0.0 1.0
grok give this table from it:
| Output \ Input |
0 (FL) |
1 (FR) |
2 (FC) |
3 (LFE) |
4 (BL) |
5 (BR) |
| 0 (FL) |
1.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
| 1 (FR) |
0.0 |
1.0 |
0.0 |
0.0 |
0.0 |
0.0 |
| 2 (FC) |
0.0 |
0.0 |
0.0 |
1.0 |
0.0 |
0.0 |
| 3 (LFE) |
0.0 |
0.0 |
1.0 |
0.0 |
0.0 |
0.0 |
| 4 (BL) |
0.0 |
0.0 |
0.0 |
0.0 |
1.0 |
0.0 |
| 5 (BR) |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
1.0 |
While the option best create a processing buffer: srcChLayout: FL, FR, FC, SL, SR, dstChLayout: FL, FR, FC, SL, SR, no matrix.
Then it create the sink buffer: srcChLayout: FL, FR, FC, SL, SR, dstChLayout: FL, FR, FC, SL, SR with the matrix:
| Output \ Input |
0 (FL) |
1 (FR) |
2 (FC) |
3 (BL) |
4 (BR) |
| 0 (FL) |
1.0 |
0.0 |
0.0 |
0.0 |
0.0 |
| 1 (FR) |
0.0 |
1.0 |
0.0 |
0.0 |
0.0 |
| 2 (FC) |
0.0 |
0.0 |
1.0 |
0.0 |
0.0 |
| 3 (BL) |
0.0 |
0.0 |
0.0 |
1.0 |
0.0 |
| 4 (BR) |
0.0 |
0.0 |
0.0 |
0.0 |
1.0 |
So I think the only way is to use only fixed option. Or the option best but with output to 5.1 like adjusted. But I see also the option passthrough is disabled for fixed - no go.