I do not know the USB audio device class before developing the driver for the USB audio device. I thought it was a hid driver and it should be easy to develop, later, I found myself in an unknown field. Thanks to the previous development of the mass storage firmware program and the knowledge of the ov511 USB camera driver, the development was completed even though it took more time and twists and turns in t
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Original article link: http://www.raywenderlich.com/204/
Guo XiaoxingWeibo: Guo Xiaoxing's Sina WeiboEmail:[email protected]Blog: http://blog.csdn.net/allenwellsGithub:https://github.com/allenwells
Android has maintained an isolated audio stream for playing music, alarms, notification bells, incoming calls, system sounds, call sounds, and DTMF channels, which is the premise that we can control different audio, most of which are system-limited and cannot
First of all you should know what is ape? What can ape file play with?
A: Ape is a lossless compression format for audio CDs.
A: It is recommended to install Plug-ins with Foobar2000,winamp (the latest version is not available) can also play, WMP install Plug-ins can also play.
Okay, now do the prep, you need to be prepared with the following software:
1. EAC 095
2. Monkey Audio 397 (that is, the monke
1. Basic knowledge of I2S
1.1 I2s Introduction
I2S bus, the abbreviation Inter-icsound, is a bus standard developed by Philips for audio data transmission between digital audio devices, which is specially used for data transmission between audio devices and is widely used in various multimedia systems. The I2S is also a synchronous serial communication interface.
Those who have been familiar with IOS audio development know that core audio is the basis for digital audio processing on iOS and Mac. It provides applications.ProgramA set of software frameworks used to process audio. All IOS audio development interfaces are provided by cor
I. Audio Codec format* MPEG audio layer 1/2* MPEG audio Layer 3 (mp3)* MPEG2 AAC* MPEG4 AAC* Windows Media audeo V1/v2/7/8/9* RealAudio cook/sipro (Real Media Series)* RealAudio AAc/aacplus (Real Media Series)* Qdesign music 2 (apple series)It is a qdesign company developed for high fidelity and high compression ratio encoding method, similar to MP3, but more adv
WAV audio files
Chess Boy 1048272975
WAV is a file format for saving audio information that is widely used in Windows and its applications, and today the mainstream audio player supports the playback of WAV audio files. 1. WAV Audio Format
WAV is the standard Windows file f
Audio terminologyIn this DOCUMENT
Generic Terms
Digital Audio
Hardware and Accessories
Audio Signal Path
Android-specific Terms
Sample Rate Conversion
This document provides a glossary of audio-related terminology, including a list of widely used, generic terms and a list
Transferred from: http://www.ibm.com/developerworks/cn/linux/l-audio/Linux Audio Programming GuideAlthough the advantages of Linux are mainly embodied in the network services, but in fact, there is also a very rich media function, this article is based on multimedia applications of the most basic sound as an object, how to develop the actual audio applications un
necessary theory should be a bit more! Let's talk about the audio preliminary.
Audio preliminary (1)
Audio: audio in English. You may see the audio output or input port on the video recorder or vcd backplane. In this way, we
Audio
MediaPlayer wake-up lockGenerally, MediaPlayer is used to play audio streams. We recommend that you use a Service to carry MediaPlayer instead of directly using it in the Activity. However, in the Android system's power consumption design, to save battery consumption, if the device is in sleep state, the system will try to reduce or disable some features that are not required by the device, including the CPU and Wifi hardware. Then, if it is an applic
SummaryThis article introduces the principle and basic implementation process of VoIP, and analyzes the composition of audio latency in the Ethernet environment. The experimental results show that the audio latency in the Ethernet environment is mainly composed of the buffer latency and API call latency, and the most important part is the API call latency. This paper proposes a method to reduce API call lat
In iOS development, the most important framework for audio and video is the avfoundation framework. Starting from this article, we will focus on avfoundation-based audio usage and processing. To learn how to use audio, you must first understand the audio session.
1. What is an aud
From: http://book.51cto.com/art/201001/179672.htm
Chapter 2Android audio system
This chapter introduces the content of the android audio system, which is mainly the audio input/output link and does not involve codec content (the audio system has content from the driver, local framework to Java framework ). This chapt
Audio Processing in WINDOWS
In WINDOWS, audio processing can be roughly divided into two parts: audio input and output, and ACM compression.In WINDOWS, Apis such as sndPlaySound (MCI) can be called to play a WAV file, but this is obviously not what we need to do. You must be able to directly Process audio data stream
In the production of the publishing side, you need to collect the sound card output signal, in order to mix with the microphone input signal, for audio processing technology, mainly the following:
Capture Microphone Input
Collect sound card output
Send audio data to the sound card for playback
Mixing multi-channel audio inputs
Here are t
016-11-25 DORAWEBRTC series Wind net WEBRTC series Wind Net
Source: Wind NET Series
Author: Weizhenwei, fan network columnist
Audio and video synchronization is the most intuitive user experience for multimedia products, and is the most basic quality guarantee for audio and video media data transmission and rendering playback. If the audio and video is not synchr
BasisLet's take a quick look at some basic audio knowledge.At present, we need to rely on audio files for audio playback on the computer, audio file generation process is the sound information sampling, quantization and encode the digital signal generated by the process, the sound that the human ear can hear, the lowes
Reprint Please specify source: http://www.cnblogs.com/fangkm/p/4374668.htmlThe previous blog introduces the local video collection, this article introduces the audio capture process, but also introduces WEBRTC native audio collection, and then introduces chromium source to its customization.1. WebRTC native Audio captureLet's first introduce the interface concept
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