If it is not lit, then either the cabling is not right or your audio device consumes too much power. Try to disconnect the cable and reconnect it, start the app, see if it helps. If the app recognizes your device and all looks ok until you press play or record and nothing happens or no signal comes in: Your Android device supports USB host, but something is missing in the kernel or perhaps the hardware that prevents the use of the required USB isochronous mode for transferring audio data.
Device detection is done using other types of communication, which is why it did get detected. If you find hits saying it doesn't have USB host mode, then your device will not work. If you find hits stating that a custom kernel can activate USB host mode, then your device will not work unless you have that specific custom ROM.
If your USB audio device is not see by this app, it means that Linux does not see it and hence Android or the app cannot use it. The reason can be a cable or power problem or missing USB host mode.
If the app does see it and Android does not see the device, then your Android device is misconfigured: it thinks it has no USB host mode, whereas it actually does in hardware. Only rooting your device and running the app 'USB host check' and pressing the 'Fix' button can solve it.
Make sure your USB device is class-compliant: Google your audio device to check if it works under Linux or with an iPad since it then has a bigger chance of working not that we use Linux drivers, but they usually have class-compliant devices working.
Check if your device has a Rockchip processor. Most older Rockchip processors do not support USB host. If it didn't cost euro or more, it is likely it doesn't have the hardware or kernel needed. If that didn't help and you are sure you have an Android device with USB host mode, you could send us a more detailed log by following these steps: Open the app Select settings or prefs Select Logging Select Log to file Exit the app Force close the app or restart your Android device with the USB audio device attached Start the app again and exit it again.
You need JavaScript enabled to view it. While it is detecting, plug in the other end of the OTG cable to the phone. If your OTG has the optional power in connect it now.
Mic Plus One The device does not have input monitoring, but works. Quartet Multichannel devices usually record properly, but playback may sound distorted, depending on the speed of your Android device. The MK2 may not work.
SB Play! Only and Hz. If it was already on USB, cycle again. Then start the app. Serial number should start with S Try before you buy! Supports DSD. Lindy USB adaptor Part no. Some NI6's only work correctly at Hz. Resets the Galaxy Tab 3 8" when connecting, even with a powered hub in between! G5 H1 Needs firmware 2. Alesis Multimix8 USB2.
Working Android devices : The list of devices is not updated regularly anymore. Using an Asus USB adaptor directly on the tablet, all is fine. Google is said to solve this issue. Host is the one which controls USB communication.
PCs mostly operate in host mode. Device is the one which is being powered and controlled by the host. Flash drive is a common example of USB device. Since Android 4. Custom Accessories page states:. Due to the low power output of Android devices, AOA requires the accessory to act as a USB host, meaning the connecting accessory must power the bus. But as per official documentation :. Accessory mode audio has not been widely adopted, and is not currently recommended for new designs.
And the AOA protocol documentation warns:. USB Device classes specify the standard protocols for USB peripheral functions so that the host can inter-operate with them without requiring any hardware-specifc driver i. Sign up to join this community. The best answers are voted up and rise to the top.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Ask Question. Yes, it is a more expensive design, but the cost is absorbed only by those who want it. Mobile devices are notorious for having high-density circuit boards, which can result in more opportunities for crosstalk that degrades adjacent analog signals. Digital communication is less susceptible to noise , so moving the DAC from the Android device A to an external circuit board C allows the final analog stages to be physically and electrically isolated from the dense and noisy circuit board, resulting in higher fidelity audio.
On the other hand, the second design is more complex, and with added complexity come more opportunities for things to fail. There is also additional latency from the USB controllers. For all of these applications, Android detects a compatible USB digital audio peripheral, and automatically routes audio playback and capture appropriately, based on the audio policy rules.
Stereo content is played on the first two channels of the peripheral. For advanced usage, the automatic routing may interfere with applications that are USB-aware. See section Wireless usage of Android Debug Bridge for an alternative.
To enable USB audio, add an entry to the audio policy configuration file. This is typically located here:. The pathname component "oem" should be replaced by the name of the OEM who manufactures the Android device, and "codename" should be replaced by the device code name. Content and code samples on this page are subject to the licenses described in the Content License. Docs Getting Started About. Core Topics Architecture. Overview Architecture. Modular System Components.
Modular Kernels. HIDL General. HIDL Java. ConfigStore HAL. Device Tree Overlays. Vendor NDK. Vendor Interface Object.
Core Concepts. Camera Features. Bluetooth and NFC. Calling and Messaging. ACTS Tests. Surface and SurfaceHolder. SurfaceFlinger and WindowManager. Hardware Composer HAL. OpenGL ES. Neural Networks. Audio Accessories. USB Headset. Custom Accessories. Sensors HAL.
Context Hub Runtime Environment. Test Development Workflow. Instrumentation Tests. Native Tests. Android Test Station. Test Framework. VTS Dashboard. Lab Infrastructure. Getting Started. Testing with TF. Through Tradefed. Through Suite. Developing TF. XML Configuration. Global Configuration. Advanced Concepts. Device Manager. Device setup.
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