Android audio architecture All AIDL interfaces are within the android. in/d-BYzAgB common — common types for audio core and effect HIDL API. For more information about how the audio engine uses buffers to transfer audio, see Understanding the WaveRT Port Driver. 0 — version 4. elapsedRealtimeNano() clock. It also provides advice about audio sampling, to help you choose the optimal sample rate and consider the pros and cons of using floating-point numbers to represent your audio data. virtio-snd provides the virtualized PCM devices to the Android VM so that the audio HAL implementation can interact with the virtualized sound devices with the TinyALSA library. com/ Android Architecture Explained in Detail. One major improvement is that audio effects inserted on an audio path entirely implemented below the audio HAL (direct connection between an input device Aug 26, 2024 · mmapBufferInfo |= AUDIO_MMAP_APPLICATION_SHAREABLE; Audio subsystem changes. xml (bus address definition), Android Audio - Learn about Android audio, video codec and android multimedia framework. 1 GA (RFP) release on NXP's i. 이 섹션에는 구현 안내와 성능 향상에 관한 팁이 포함되어 있습니다. 2) and these are only device-specific. Android Audio Architecture Android Audio Architecture. Host. If we see the architecture of android framework we can see media Jun 3, 2023 · 1. Enables the Android device to drive the USB bus and operate with a wide range of USB-based peripherals, including audio interfaces. If you experience problems, try another MIDI peripheral or a powered USB hub. Applications. Jun 17, 2022 · AudioTrack的创建 大致流程图 对应代码 总的来说： 上层的AudioTrack最后都会对应一个Native层的Track AudioTrack会通过binder通信 Dec 12, 2024 · Architecture Audio Camera Connectivity Data Display Fonts Graphics Interaction Media Performance Android Automotive is a full-stack, open source, highly In this tutorial, you will learn Android Audio Manager with the help of examples. AUDIO_FORMAT_PCM_8_24_BIT is currently not supported in AAudio, but the hardware may use it. media APIs to interact with audio hardware. The "tee sink" is an AudioFlinger debugging feature, available in custom builds only, for retaining a short fragment of recent audio for later analysis. 从Android5. Dec 18, 2024 · The Android platform provides audio effects on supported devices in the audiofx package, which is available for developers to access. This document describes how to measure audio warmup time and possible ways to decrease warmup Oct 8, 2023 · Implementing audio filters in Android applications requires a solid understanding of the Android audio framework. It is the heart of android architecture that exists at the root of android architecture. Jan 7, 2024 · In earlier versions, the audio architecture of the Android system was primarily based on ALSA, and its upper implementation could be seen as an “application” of ALSA. Play audio or video from media files stored in your application's resources (raw resources). For more information about APOs, see Windows Audio Processing Objects. To implement audio filters, developers need to leverage the AudioEffect class, which is part of the Android media framework. Android Audio Framework Architecture. 0 and provides limited audio capability, as described in Connecting custom audio over USB. Aug 17, 2020 · Gemini in Android Studio Learn more Get Android Studio Get started Hello world Training courses Tutorials Kotlin for Android Monetization with Play ↗️ Extend by device Adaptive apps Wear OS Android for Cars Android TV ChromeOS Cross-device SDK Build by category Games Camera & Media Aug 26, 2024 · This article describes some tips and tricks for debugging Android audio. For details, see Car Audio Plugin Service. Android manages the sounds coming from Android apps, controlling those apps and routing their sounds to output devices at the HAL based on the type of sound: Oct 26, 2021 · Audio effects; Video/audio conferencing; This section explains the general principles of minimizing audio latency. Following is a list of definitions for terms used in Figure 1: Android app An app created solely using the Android API. Jan 4, 2019 · Android audio architecture. io Jan 5, 2024 · This section covers the core APIs for handling audio and video data, including use-cases like playback, editing, and recording. android-11. Directory structure of the audio HAL related code. 0 — version 2. May 20, 2024 · Android is an open source, Linux-based software stack created for a wide array of devices and form factors. Direct Transport Audio (DTA) bypassing Android SRC, resampling free playback from all applications Systemwide Direct Transport Audio Architecture Bypasses Android's sample rate conversions at the system level for bit-perfect audio output. Android 音频架构. Dec 18, 2024 · For car audio service specifically, OEMs can implement any of the audio sub services to manage audio action. Prior to the Android 9 release, effect chain processing was implemented in stereo int16 sample format. Figure 1 shows the major components of the Android platform. This had several limitations: All output effects forced conversion from floating point audio data to int16, causing loss of precision. AudioPolicy decides which AudioFlinger thread handles which audio stream. For an explanation of HAL architecture before Android 8, refer to Legacy HALs. M* package, where N. Android software contains an open-source Linux Kernel having a collection of a number of C/C++ libraries which are exposed through application framework services. media the underlying audio drivers and hardware. Oct 8, 2024 · Android architecture contains a different number of components to support any Android device’s needs. audio-hal-aidl is added specifically for the AIDL version of the HAL. io Jun 20, 2017 · Audio Manager Framework briefly explains the android audio architecture along with a sample application which records an audio and plays back an audio whic Jan 5, 2024 · The preferred architecture for an audio app is a client/server design. These streams are tagged with AudioAttributes, which provide Nov 19, 2024 · Android 14 introduces a new reason an app can be placed into the restricted standby bucket. 🔊 Dive into the world of #Android #AudioArchitecture with this insightful blog by Sachin Magar - https://lnkd. 3?), and is not natively supported by all devices. Dec 11, 2024 · That is, the mobile device speaker or a Bluetooth headset. Use this to construct an audio mix that maps audio usages to an output device. Methods: • global settings (for all processes), • user / profile settings, • car variant specific, • static vs dynamic. All audio contexts should be represented within a zone. 3 (API level 9) and higher. android. You can use the ID to bind an audio stream to a specific audio device. The major contributors to audio warmup time are power management and any "de-pop" logic to stabilize the circuit. Application framework The application framework includes the app code, which uses the android. ARN Android™ Release Notes Rev. AudioFlinger contains multiple threads that read and write audio Dec 18, 2024 · In Android 11, a new user setting was introduced to allow users to alter the interaction behavior between navigation and phone calls. OMX , codec Also first half of the video expalins the architecture of Multimedia. When the mixer behavior is BIT_PERFECT, no audio mixing, volume adjustment, or audio processed effect is applied to the playback. Stagefright audio and video playback features include integration with OpenMAX codecs, session management, time-synchronized rendering, transport control, and DRM. It is comprised of an Audio Framework layer that includes AudioTrack, AudioRecord and AudioPolicy classes that handle routing audio between apps and the hardware. Is it the same as in Linux? I mean virtually every linux distributions use ALSA, so do android also use ALSA as sound driver? Jun 1, 2019 · This section provides background information on the Android audio pipeline architecture used to enable low-latency features for audio applications, how Android tries to achieve energy efficiency while scheduling latency-sensitive tasks, and deadline-based scheduling features in the Linux kernel, that are at the foundation of our solution. However, in most cases you can let AAudio choose the default primary device rather than specifying one yourself. The Audio HAL defines the standard interface that audio services call in to. 1) Linux kernel. It represents a "fake" audio HAL that doesn't actually communicate with hardware. Android Audio System（1）：Linux && Android Audio 系统框架. If a user Dec 18, 2024 · Note: HALs existed before Android 8. Second h Aug 15, 2023 · Stream-centric architecture diagram Logical Streams. HiQnet Audio Architect™ is the ultimate software application designed to configure and control the widest varieties of professional installed sound systems. Related files: • audio_policy_configuration. If the component name is invalid, CarService would not connect to any OEM service. That legacy path is used for all other system sounds and application sounds. 0 of the common types HIDL API. KEY_AUDIO_FOCUS_NAVIGATION_REJECTED_DURING_CALL changes the interaction between incoming NAVIGATION focus requests and current CALL focus holders from concurrent to rejects. Required terms. JNI and Native Framework: Connects Java APIs to native audio processing via Binder IPC proxies. OpenSL is supported by devices starting from Android 2. Minor version. Jan 17, 2014 · The document discusses the Android audio system architecture. • audio effects, • audio codecs configuration, • audio hardware paths, • audio features (CDD), • default sounds. 0 API. These classes are compatible with devices running Android 2. what was expected. audio. hardware. https://aospguru. Configure multi-zone audio. I've almost got the distinction into streams . Later versions of Android began to not rely on the user-space layer implementation provided by ALSA, perhaps due to some shortcomings of ALSA. Mar 4, 2024 · Please check my new blog published on 4th March 2024 on Android Audio Architecture. g. Apr 8, 2023 · Android multimedia framework is designed to provide a reliable interface for java service. Android 7. 4. 0. 0 are replaced with 7. prop: The property ID for this value. 2. Accessory. Before you start diving into customizing your Android sound setting for a preferred melody, it is essential to understand the core basics of Android’s sound architecture. media APIs dis-cussed earlier is a push operation, which means that data written is pushed down by the audio framework and buffered in the native layer. This section describes the Core, Effects, and Common HAL APIs for HIDL. You cannot play sound files in the conversation audio during a call. Car audio service architecture. 시스템 API는 파트너 및 OEM이 번들 애플리케이션에 포함하기 위해서만 사용할 수 있는 Android API를 나타냅니다. In AAOS, car audio service manages these actions: Audio routing; Audio focus; Audio ducking; Volume and mute; Before Android 14, this behavior was largely static and could only be modified through settings, albeit for a very limited set of cases. Car audio zones are an abstraction of audio outputs, audio focus, and other audio settings, all of which can be managed independently. The audio HAL library is loaded based on the device properties, and the AudioFlinger service initializes and manages the audio streams. Android API Android API는 서드 파티 Android 앱 개발자에게 공개적으로 제공되는 API입니다. Automotive audio systems handle the following sounds and streams: Figure 1. 1. AIDL로 전환하고 이전 메이저 오디오 HAL 버전을 지원 중단하고 삭제하면 기기의 디스크 공간과 RAM이 확보됩니다. Audio HAL. All HIDL interfaces are within the android. You'll also find recommendations on app architecture and descriptions of platform behaviors here. Aug 26, 2024 · Android-specific terms include terms used only in the Android audio framework and generic terms that have special meaning within Android. Apr 9, 2024 · Understanding Android Sound Architecture to Customize Sound Settings. Each section is described in more detail below. Android Audio Architecture. Get started Oct 7, 2015 · What is the sound architecture in Android. Android のオーディオ ハードウェア抽象化レイヤ（HAL）は、android. Guidelines for implementation of dynamic and static spatial audio modes Dec 18, 2024 · Multi-zone audio architecture. 0_1. The audio engine: Mixes and processes audio streams. Having understood that, we can then dive into what Jan 5, 2024 · The media-compat library contains classes that are helpful for building apps that play audio and video. Introduction Build AI-powered Android apps with Gemini APIs and more. from publication: Energy-Efficient Low-latency Audio on Android | Counting more than two billion devices, Android is Android의 오디오 하드웨어 추상화 계층(HAL)은 android. CODEC in the Audio-ALSA architecture; Linux ALSA Driver 1: Overview of Audio System; Android Audio architecture analysis; 5. AAudio requires an additional data path at the audio front end of the audio subsystem so it can operate in parallel with the original AudioFlinger path. Jul 16, 2023 · Implementing custom audio effects in Android involves utilizing the Android Audio Effects API, which provides a set of classes and interfaces for manipulating audio streams. Get started Jun 18, 2018 · Android Audio Framework Architecture This article highlights Android audio architecture, audio frameworks, role of audioflinger, audio HAL and its… gopinaths. Android Audio框架介绍. They also work with other Android features to create a comfortable, familiar Android experience. SYSTEM CONFIGURATION. For routing purposes, each zone is defined as a set of audio output bus devices as arranged in the audio policy configuration. Contribute to fs-sournary/android-audio-architecture development by creating an account on GitHub. Core functionality: Change (all apps) System enforces cached-app Android 音频架构定义了音频功能的实现方式，并指出实现中所涉及的相关源代码。 图 1. gitlab. app − Provides access to the application model and is the cornerstone of all Android applications. Linux kernel The foundation of the Android platform is the Linux kernel. for one of the Nexus devices, this can be treated as a reference design. media API 与音频硬件进行交互。在内部，此代码会调用相应的 JNI 粘合类来访问与音频硬件互动的原生代码。 HiQnet is HARMAN’s comprehensive communications protocol or language with which all device-types within the full audio signal path can communicate. This is an Intermediate Course intended for learners passionate about Android Development and have basic knowledge of Android Development. HaleyTek wanted to have a self-organized team of experts, including a Scrum Master/Project Manager role, to work closely with their teams to deliver Dec 18, 2024 · Android 7. The tree below explains the role of each subdirectory: May 4, 2011 · If you want to do your analysis while recording is still in progress, you need to use AudioRecord, as MediaRecorder automatically records into a file. 音频基础知识 声音有哪些重要属性呢？ 1. Audio in Android Dec 11, 2020 · Hi All,In this video, I have explained the concept of Stagefright. 1. In Android, ALSA refers to the kernel audio framework and Architecture; Design robust, testable, and maintainable app logic and services. xml file for the framework to use them. It is a software stack based on modified versions of the Linux kernel (or kernel for short) and other open-source programs. Mar 1, 2017 · Secondly, there is a mandatory reading - Audio Architecture in Android. ALSA Advanced Linux Sound Architecture. Audio context to audio devices mapping. Download scientific diagram | Overview of the Android audio architecture. It must be pre-installed. effect@N. Internally, this code Dec 18, 2024 · Android's Audio hardware abstraction layer (HAL) connects the higher-level, audio-specific framework APIs into android. Stream-centric architecture diagram. Dec 18, 2024 · Virtualization architecture Audio. You can: Integrate audio, video, and images into your applications. audio. A summary of some key core Android libraries available to the Android developer is as follows −. Play audio or video from standalone files in the file system. conf and added support for defining an audio topology using an XML file format that's more human-readable, has a wide range of editing and parsing tools, and is flexible enough to describe complex audio topologies. Following is a list of definitions for terms used in this section of documentation: Android Interface Definition Language (AIDL) Jun 3, 2022 · Android is an open-source mobile operating system designed primarily for touchscreen mobile devices such as cell phones and tablets. in/g-yKmkPP 🎶 The Android audio architecture is a complex framework responsible Nov 4, 2012 · The document discusses the Android audio system initialization process and the creation of playback and recording threads. 이러한 API는 소스 코드에서 @SystemApi로 표시합니다. Aug 26, 2024 · Android audio architecture defines how audio functionality is implemented and points to the relevant source code involved in the implementation. Dec 18, 2024 · Audio HAL capabilities must be declared in the audio_policy_configuration. The audio framework consists of AudioTrack, AudioRecord, AudioPolicy and AudioFlinger which control audio routing and playback. After lots of code writing and lots of debugging pass CTS testsuit, to make sure you are compliant with the Android OS. Logical streams are the streams of audio data that are generated by Android apps. Developing an Android application takes effort and skill, but it's even more challenging to keep this application maintainable and extensible in the long term. And then most likely Apple Music wouldn't allow something like this Android Architecture. AudioRecord has the disadvantage, that after calling startRecording() you need to poll the data yourself from the AudioRecord instance. This API allows developers to apply various audio processing techniques, such as equalization, reverb, and bass boost, to name a few. Dec 18, 2024 · All audio devices that contain a volume group are controlled together with the same gain changes. An audio framework for Linux that has also influenced other systems. The platform has a flexible audio system that lets you customize sound settings to cater to various Dec 18, 2024 · Android 13 optimizes for spatial audio and head tracking by offering spatial audio processing at the lowest possible level in the audio pipeline to obtain the lowest possible latency. What are the primary responsibilities of each component? Android audio system architecture consists of four main components: AudioManager, AudioTrack, AudioRecord, and MediaRecorder. M is the Major. May 4, 2023 · Each audio device has a unique ID on the Android device. . In Android 12, all code paths containing 6. Android architecture or Android software stack is categorized into five parts: linux kernel; native libraries (middleware), Android Runtime; Application Framework; Applications; Let's see the android architecture first. 🔊 Dive into the world of #Android #AudioArchitecture with this insightful blog - https://hubs. When set, android. 响度(Loudness) 响度就是人类可以感知到的各种声音的大小，也就是音量。 Dec 18, 2024 · Android Automotive OS (AAOS) builds on the core Android audio stack to support the use cases for operating as the infotainment system in a vehicle. The Android audio framework has a multi-layered architecture: Application Layer: Includes the Android Media APIs (android. Android audio architecture Application framework The application framework includes the app code, which uses the android. ly/Q02vjXfJ0 🎶 The Android audio architecture is a complex framework responsible for all audio Dec 18, 2024 · Figure 1 shows a high-level overview of the car audio service architecture, in which the car audio service communicates with the audio control HAL. However, the fast mixer for OpenSL (high performance audio) is available since Android 4. Simple audio app for android. MX 8QuadXPlus/8QuadMax MEK board and 3 Release Mar 20, 2022 · Android Audio中的AudioPatch概念. The Android audio framework provides a set of APIs that allow developers to capture, process, and play audio. In general, Android audio architecture is an audio signal processing tool which involves multiple operations and is responsible to provides various functionalities like recording microphone audio, playing music, adding audio effects, real-time voice communication etc. Dec 18, 2024 · Field Description; timestamp: The timestamp representing the time the event happened and synchronized with the SystemClock. The audio device attached to a stream determines whether the stream is for input or output. Platform in the Audio-ALSA architecture; From device driver to alsa, understand linux audio driver; Android talk: dumpsys audio understand the audio system; Android Audio chapter (1) ----- Audio architecture Nov 19, 2024 · This returns the audio format used by the hardware. In this video, we discuss all the layers of the Android Operating System including Stock Apps Jan 5, 2024 · When the mixer behavior is DEFAULT, it indicates that audio data from different sources is mixed. 1 Android Audio Framework The first layer that handles audio in Android is the application framework. The following diagram shows the major components of the Android operating system. The server is a MediaBrowserService containing the player and a media session. content − Facilitates content access, publishing and messaging between applications and application components. The audio gain configuration for all devices in a group should be the same. The component name can't be a third party package. Figure 1. Dec 12, 2024 · Read about the Android system architecture and each of its constituent pieces. It is a system that includes multimedia applications, frameworks, an OpenCore engine, hardware devices for audio/video/ input, output devices also several core dynamic libraries such as libmedia, libmediaplayservices, and so on. Directory Structure for AIDL audio HAL. media) used by applications to manage audio playback, recording, and streaming. Dec 18, 2024 · In Android 14, the name vendor. The software stack for AOSP contains the following layers: Figure 1. 3. Aug 26, 2024 · Audio warmup is the time it takes for the audio amplifier circuit in your device to be fully powered and reach its normal operation state. Android 14 이상에 추가된 기능의 새로운 HAL API는 AIDL 인터페이스 구현에서만 지원됩니다. media の高レベルのオーディオ固有フレームワーク API を基盤となるオーディオ ドライバとハードウェアに接続します。このセクションでは、実装の手順とパフォーマンス改善のヒントについて Android Architecture. 7. Android sounds and streams (1/2) Public 6 Music Player Voice Assistant Navigation Calendar Audio Flinger Audio HAL Mixer 0 Mixer 1 Mixer 2 Bus 0 Bus 1 Bus 2 External Mixer Car Amplifier(s) Audio sources Audio devices Audio contexts MUSIC NAVIGATION VOICE_COMMAND CALL_RING CALL ALARM NOTIFICATION SYSTEM_SOUND Tuner Chime Unit In this course you'll journey into the depths of Android Architecture and learn to build clean and maintainable Android applications. The data is sent as is to the HAL and finally down to the USB device. Android 14부터 HIDL 구현에 새로운 API는 추가되지 않습니다. Feb 6, 2024 · About Android Audio Architecture. 1 The i. See full list on gopinaths. Mar 16, 2015 · I am trying to get a better understanding of android audio framework (froyo onwards in particular). In virtualized AAOS, the Android guest VM can use virtio-snd to access audio. Architecture; Design robust, testable, and maintainable app logic and services. Embark on a comprehensive exploration of Android's architectural components, complemented by an in-depth study of its multimedia frameworks. 2. The client is an Activity in your app that includes a MediaBrowser, media controller, and the UI. AOSP architecture. The Android audio framework employs a push-based opera- Dec 18, 2024 · Starting in Android 11, the device manufacturers have the ability to automatically attach and enable specific audio effects when a given audio device is selected for audio capture or playback. If AAudioStreamBuilder_openStream() returned AAUDIO_OK, this should always return an aaudio_format_t. To achieve this, they needed a reliable supplier with hands-on expertise related to Android development, including audio architecture, 3rd party solution integration, and Android quality assurance. ) Dec 18, 2024 · The guidelines on this page apply to a spatial audio solution that adopts the new spatial audio APIs and audio architecture with an Android phone running Android 13 and higher and compatible headsets with head-tracking sensor. Dec 18, 2024 · Android sounds and streams. In this session, we will take a deep dive into how audio is processed and prepared by the Android system. effect package. Audio HIDL HAL API. For a generic definition, refer to ALSA. Android will ship with a set of core applications including an email client, SMS program, calendar, maps, browser, contacts, and others. HIDL audio control HAL version 1 was introduced in Android 9 to support audio fade and balance in automotive use cases. Internally, this code calls Dec 31, 2024 · 1. car. 0 release is an Android Automotive 2 Supported Hardware SoC/Boards . Oct 12, 2018 · Although OpenSL ES can be used from Android API level 9, significant improvements for audio output latency were added later in Android API level 17 (Android 4. However, Android 8 ensured each HAL had a standard interface. AOSP software stack architecture. Background This section provides background information on the Android audio pipeline architecture used to enable low-latency features for audio applications, how Android tries to achieve energy efficiency while scheduling latency-sensitive tasks, 13 IP T ACCEPTED MANUSCRIPT Table 1: Comparative chart of prior literature. 应用框架 应用框架包含应用代码，该代码使用 android. Loads Audio Processing Objects (APOs), which are H/W-specific plugins that process the audio signal. Tee sink. 0-AUTO — 25 January 2021 Release Notes Contents 1 Release Description 1 Release Description. Writing audio data to the android. The Audio HAL must be implemented for the audio hardware to function correctly. Core functionality: Change (all apps) mlock limited to 64 KB In Android 14 and higher, the platform reduces the maximum memory that can be locked using mlock() to 64 KB per process. 0 were replaced with 7 May 3, 2017 · OpenSL ES. The modified Android audio framework and API in Android 13 facilitates the adoption of spatial audio technology across the ecosystem. Tip: Check out the Media Developer Center for best practices and guidance on creating a best-in-class multidevice app. 0之后，AOSP引入了AudioPatch概念，用于表示音频中端到端的连接关系。 从代码中推测，AudioPatch主要用于连接source与sink。 Dec 18, 2024 · See Audio effects for Android 11 release changes. example — example implementation of the core and effect V7. Dec 18, 2024 · For further information on Android compatibility, refer to the Android compatibility program. The AudioFlinger maps each stream into a "strategy" and then routes a strategy to the proper "device" (BT, Headset, Speaker. 0 — version 7. AAOS is responsible for infotainment sounds (that is, media, navigation, and communications) but isn't directly responsible for chimes and warnings that have strict availability and timing requirements. 0 deprecated audio_policy. Sep 13, 2012 · So anybody worth their salt in the android development community knows about issue 3434 relating to low latency audio in Android. A MediaBrowserService provides two main features: Aug 26, 2024 · Android includes Stagefright, a media playback engine at the native level that has built-in software-based codecs for popular media formats. 3 (Gingerbread). media에 있는 상위 수준의 오디오별 프레임워크 API를 기본 오디오 드라이버 및 하드웨어에 연결합니다. https://lnkd. Note: For Android 13, all code paths containing 7. Audio fade and balance. Our easy-to-follow, step-by-step guides will teach you everything you need to know about Android Audio Manager. Explain the architecture of the Android audio system and its components. The Android software stack. 2 (or 4. Provided by Android Open Accessory (AOA) 2. The AIDL version is located inside aidl directory. For example, the Nexus 10 supports the following preprocessing effects: The document discusses the Android audio system architecture which includes the audio framework, audio HAL, and audio driver. This permits comparison between what was actually played or recorded vs. Below this is the Audio HAL interface that provides read/write functions to the underlying Linux audio driver and hardware. Dec 18, 2024 · Car audio service with OEM service architecture. Designed for software developers, mobile app enthusiast Aug 26, 2024 · However some larger peripherals, or peripherals with audio output or lights, require more power than the host device can supply. MX Android™ automotive-11. Learn more about graphics, audio, and the Android display. Architecture. 0 uses the USE_XML_AUDIO_POLICY_CONF build flag for choosing the XML format of config Aug 26, 2024 · Does not support audio. Effects HAL. but instead an architecture 3. If AUDIO_FORMAT_PCM_8_24_BIT is used by the hardware, return AAUDIO_FORMAT_PCM_I24_PACKED. Next, check the source code e. bvu vpwycqxh fxtbwr czkiwx scskkwglf niaw slk raqgb uyem sgnod