| Label | Vocabulary | Concept | Subdivision | Identifier | |
|---|---|---|---|---|---|
| 1. | stereo | Playback |
ste | ||
| stereophonic | |||||
| 2. | mixed | Playback |
mix | ||
| 3. | surround | Playback |
mul | ||
| quadraphonic ; multichannel | |||||
| 4. | mono | Playback |
mon | ||
| monaural | |||||
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