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Using ALSA audio drivers in Android
https://jichu4n.com/posts/using-alsa-audio-drivers-in-android/
First, of course, ALSA drivers for the chip must be enabled in the kernel; to check whether they are working, see if /dev/snd is properly populated. If not, check if the driver has been compiled into the kernel and not as a module. There are three libraries that act as intermediate layers between an ALSA sound device and the Android userland.
android - About ALSA driver: How to handle Audio …
https://stackoverflow.com/questions/17194777/about-alsa-driver-how-to-handle-audio-devices-correctly
1 Recently ,I am trying to develop a alsa driver for Linux (actually ,Android TV).I came across a problem about alsa (alsa refers to Advanced Linux Sound Architecture) devices handling Actually ,I have studied part of source code of alsa-lib-1.0.27.1, and tinyalsa (for android devices). And I studied audio driver of Samsung Devices.
Audio - Android Open Source Project
https://source.android.com/devices/audio/
The audio driver interacts with your hardware and HAL implementation. You can use Advanced Linux Sound Architecture (ALSA), Open Sound System (OSS), or a custom driver (HAL is driver-agnostic).
alsa - No Audio in Android-x86 - Stack Overflow
https://stackoverflow.com/questions/11037254/no-audio-in-android-x86
Working on phoenix os and androidx86 for sound fix 1) Install AlsaMixer apk 2) Open AlsaMixer 3) Search Master Playback Volume and edit value to 90 Share Improve this answer answered Mar 13 '20 at 15:21 S3CR3T K3Y 1 Add a comment Your Answer Post Your Answer
IMX6 Implementing Dummy ALSA Driver in Android - NXP
https://community.nxp.com/t5/i-MX-Processors/IMX6-Implementing-Dummy-ALSA-Driver-in-Android/m-p/409973
BSP: android_kk4.4.2_1.0.0-ga CPU: imx6dl I have an Android device that doesn't have any audio codecs and Android doesn't seem to like that very much. I am using a Parallel LCD rather than HDMI so it seems I cannot just dead-end the sound through the HDMI driver. Boot Log: usbcore: registered ne...
Download - AlsaProject
https://alsa-project.org/main/index.php/Download
alsa-driver alsa-driver contains the ALSA components that run in kernel space (e.g. all the modules). It also contains a few user-space components, including the alsasound startup script and a set of ALSA headers. This package is now obsolete. The kernel development continues in the standard linux kernel tree [2].
Android Audio's 10 Millisecond Problem: The Android …
https://superpowered.com/androidaudiopathlatency
Audio driver (ALSA, OSS, etc.) The audio driver receives the incoming audio into a ring buffer in "bus buffer size" steps using the audio chip's native sample rate, 48000 Hz in most cases.
audio - Sound architecture in android - Android ...
https://android.stackexchange.com/questions/125252/sound-architecture-in-android
Android, on the kernel level, uses ALSA or its alternative OSS (Open Sound System) to speak to the Hardware. HAL (Hardware Abstraction Layer) sits on the top of Kernel which is a purely android implementation that communicates with the Kernel. Apparently, apps can't directly talk to ALSA/OSS as they do in Linux.
Audio Devices and Configuration - Arun Raghavan
https://arunraghavan.net/2016/01/audio-devices-and-configuration/
Broadly, the task involves looking at how the devices is set up on Android, and then replicating that process using the standard ALSA library, which is what PulseAudio uses (this works because both the Android and generic Linux userspace talk to the same ALSA-based kernel audio drivers). Android’s configuration
USB Digital Audio | Android Open Source Project
https://source.android.com/devices/audio/usb
Android 5.0 (API level 21) and above supports a subset of USB audio class 1 (UAC1) features: The Android device must act as host The audio format must be PCM (interface type I) The bit depth must be 16-bits, 24-bits, or 32-bits where 24 bits of useful audio data are left-justified within the most significant bits of the 32-bit word
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