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Matrix (sound recording)
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In sound recording, a matrix can refer to a disc in the early stages of processing a record for mass production; see mastering and pressing process discussion at gramophone record. Matrix can also refer to the encoding of several channels of audio into fewer channels to be decoded back into several channels later.
Contents |
| Encoding Matrix | Left Front | Right Front | Left Back | Right Back |
|---|---|---|---|---|
| Left Total | 1.0 | 0.0 | j0.7 | k0.7 |
| Right Total | 0.0 | 1.0 | k0.7 | j0.7 |
j = + 90° phase-shift , k = - 90° phase-shift
| Encoding Matrix | Left Front | Right Front | Left Back | Right Back |
|---|---|---|---|---|
| Left Total | 0.92 | 0.38 | j0.92 | j0.38 |
| Right Total | 0.38 | 0.92 | k0.38 | k0.92 |
j = + 90° phase-shift , k = - 90° phase-shift
| Encoding Matrix | W (pressure signal) | X (front-back information) | Y (left-right information) |
|---|---|---|---|
| Left Total | 0.470 + k0.171 | 0.093 + j0.255 | +0.328 |
| Right Total | 0.470 + j0.171 | 0.093 + k0.255 | -0.328 |
j = + 90° phase-shift , k = - 90° phase-shift
| Encoding Matrix | Left | Right | Center | Surround |
|---|---|---|---|---|
| Left Total | 1.000 | 0.000 | 0.707 | j0.707 |
| Right Total | 0.000 | 1.000 | 0.707 | k0.707 |
j = + 90° phase-shift , k = - 90° phase-shift
The encoding matix is the same as for Dolby Surround; only the Pro Logic decoder differs.
| Encoding Matrix | Left | Right | Center | Surround |
|---|---|---|---|---|
| Left Total | 1.000 | 0.000 | 0.707 | j0.707 |
| Right Total | 0.000 | 1.000 | 0.707 | k0.707 |
j = + 90° phase-shift , k = - 90° phase-shift ///00
| Encoding Matrix | Left | Right | Center | Rear Left | Rear Right |
|---|---|---|---|---|---|
| Left Total | 1.000 | 0.000 | 0.707 | j0.8165 | j0.5774 |
| Right Total | 0.000 | 1.000 | 0.707 | k0.5774 | k0.8165 |
j = + 90° phase-shift , k = - 90° phase-shift
