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| with three different settings. Note that exclusive mode is most used in experiments and is the mode best comparable with for | | with three different settings. Note that exclusive mode is most used in experiments and is the mode best comparable with for |
| instance Linux Alsa. Shared mode is best comparable with Linux Jack. | | instance Linux Alsa. Shared mode is best comparable with Linux Jack. |
| + | |
| + | In exclusive mode the histogram is square. The minimum delay is 15 ms, the maximum delay is 24 ms. This is caused by a single 10 ms buffer. |
| + | |
| + | The maximum error is therefore 24 ms. When a distinction is made between accuracy and precision, the maximum accuracy error is 14 ms, |
| + | the maximum precision error is 10 ms. |
| + | |
| + | Note that for most experiments this is more than good enough. |
| === Presentation, Exclusive Mode === | | === Presentation, Exclusive Mode === |
| + | [[File:Exclusive mode.png|border|Exclusive mode delay]] |
| === Presentation, Shared Mode === | | === Presentation, Shared Mode === |
| + | [[File:Shared.png|border|Shared mode delay]] |
| === Presentation, DirectX Mode === | | === Presentation, DirectX Mode === |
| + | [[File:Directx.png|border|DirectX mode delay]] |
| | | |
| == Alternative definitions == | | == Alternative definitions == |
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| | | |
| === Precision test === | | === Precision test === |
− | This test does not measure the audio delay itself, but only the precision. It can be combined with the previous test. | + | This test does not measure the audio delay itself, but only the precision. It can be combined with the previous tests. |
| + | The difference is that step 3 and 4 are exchanged. This effectively deducts the time that sending the audio stimulus |
| + | takes is deducted from the audio delay. If the audio is made with a synchronous function then this test is similar to |
| + | how visual delay is measured. |