doc:appunti:linux:audio:audio_recording
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doc:appunti:linux:audio:audio_recording [2020/12/28 10:06] – niccolo | doc:appunti:linux:audio:audio_recording [2020/12/28 18:22] (current) – niccolo | ||
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The **2.6 volt** current provided by the USB adapter on th **jack ring** will go nowhere (not connected). The **2.6 volt** current provided on the **jack tip** is probably not required by the UHF receiver, but **it should not harm**. **No infromation** is available about **microphone impedence** expected by the USB adapter, on the other hand no information is available about the **impedence of the mic interface** of the UHF receiver. | The **2.6 volt** current provided by the USB adapter on th **jack ring** will go nowhere (not connected). The **2.6 volt** current provided on the **jack tip** is probably not required by the UHF receiver, but **it should not harm**. **No infromation** is available about **microphone impedence** expected by the USB adapter, on the other hand no information is available about the **impedence of the mic interface** of the UHF receiver. | ||
- | Despite all this empirical approach, the **voice registration is quite satisfying**! | + | Despite all this empirical approach, the **voice registration is quite satisfying**! |
- | ====== External | + | ===== Wireless |
See this article about **[[audio_recording_tmb113_e]]**. | See this article about **[[audio_recording_tmb113_e]]**. | ||
- | ====== External | + | ===== Wireless |
See this article about **[[audio_recording_android]]**. | See this article about **[[audio_recording_android]]**. | ||
- | ===== Problem: silence gaps using a cheap USB dongle ===== | + | ===== Wireless mic on Ugreen USB audio adapter ===== |
+ | |||
+ | See this article about **[[audio_recording_usb_adapter]]**. | ||
+ | |||
+ | ====== Problem: silence gaps using a cheap USB dongle | ||
I was **unable to use the microphone connector** on my Acer TravelMate, so I tried to use an USB dongle, marked **LinQ**. The device was detected by the Linux Kernel 4.9.0: | I was **unable to use the microphone connector** on my Acer TravelMate, so I tried to use an USB dongle, marked **LinQ**. The device was detected by the Linux Kernel 4.9.0: | ||
Line 125: | Line 129: | ||
{{audacity-track-gaps.png? | {{audacity-track-gaps.png? | ||
- | ===== Ugreen USB audio adapter ===== | + | ====== Web References |
- | + | ||
- | The device is detected by the Linux Kernel 4.9.0 in this way: | + | |
- | + | ||
- | < | + | |
- | usb 2-1.3: new full-speed USB device number 5 using ehci-pci | + | |
- | usb 2-1.3: New USB device found, idVendor=0d8c, | + | |
- | usb 2-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0 | + | |
- | usb 2-1.3: Product: USB Advanced Audio Device | + | |
- | usb 2-1.3: Manufacturer: | + | |
- | input: C-Media Electronics Inc. USB Advanced Audio Device as / | + | |
- | / | + | |
- | hid-generic 0003: | + | |
- | input, | + | |
- | on usb-0000: | + | |
- | </ | + | |
- | + | ||
- | {{ ugreen-usb-audio.jpg? | + | |
- | + | ||
- | Launching **alsamixer** and hitting F6 you can select the **USB Advanced Audio Device** sound card. Hit F4 to view the only one capture device, i.e. the microphone input line. Press **Space** to enable/ | + | |
- | + | ||
- | It seems that the best setting for audio recording through the mic, is to keep the **capture mic gain to 100**: | + | |
- | + | ||
- | {{usb-advanced-audio-device-alsamixer.png? | + | |
- | + | ||
- | The **microphone socket** is a **3.5 mm TRS type** (three poles), it provides a bias current of **2.6 V** on both the **tip** and the **ring**, so it is advisable, as reported in the device manual, to **NOT use a simple two poles mono jack** (TS type), because it will short-circuit the bias current on the ring with the ground on the sleeve. | + | |
- | + | ||
- | ===== Web References ===== | + | |
* [[wp> | * [[wp> |
doc/appunti/linux/audio/audio_recording.1609146402.txt.gz · Last modified: 2020/12/28 10:06 by niccolo