doc:appunti:linux:audio:audio_recording
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| doc:appunti:linux:audio:audio_recording [2019/05/22 15:51] – [Electrical compatibility and hardware autodetection] niccolo | doc:appunti:linux:audio:audio_recording [2020/12/27 08:34] – [Electrical compatibility and hardware autodetection] niccolo | ||
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| On a Xiaomi Mi A1 smartphone, which has a **TRRS 3.5 mm jack, CTIA standard**, we measured a bias current of **2.19 volt** between the microphone (sleeve) and the ground (ring). | On a Xiaomi Mi A1 smartphone, which has a **TRRS 3.5 mm jack, CTIA standard**, we measured a bias current of **2.19 volt** between the microphone (sleeve) and the ground (ring). | ||
| - | Another parameter which should be considered is the **impedence** | + | Another parameter which should be considered is the **impedence**, but unfortunatelly it is generally **impossibile to find documentation** about what is expected by the smartphone and what is offered by the microphone. |
| ===== Software capabilities and settings ===== | ===== Software capabilities and settings ===== | ||
doc/appunti/linux/audio/audio_recording.txt · Last modified: 2020/12/28 18:22 by niccolo