This is the past DOS era of the compilation of source code, although has passed, but for the study of the assembly is still helpful, assembly language is just a basic programmer language, most people can grasp, not necessarily in-depth research.
; Sound.asm;; This is a small sound example for the IBM PC; It'll play notes of the octave starting at Middle C.;-----------------------------------------------------------------------------; How to generate sound on the IBM PC:;; The 8255 (port 61H) bi
Abstract: Today, with the development of chip technology and high-bandwidth communications, developers are able to make a fuss about a more superior voice-calling experience, while the demand for hands-free calls is getting higher on the market. However, hands-free communication systems often need to be able to cope with various disturbances. One of the interferences that cannot be overlooked is acoustic echo in the Speaker Echo microphone field (loud
Current results: Speaker read local data, Mic recorded real-time data, can be 90% to eliminate the echo, Aecdelay also need to tune, NS and VAD are normally available. First ensure the AEC normal, next speaker real-time network data, from double talk there is a long way, refueling.
Effect Diagram:
Real-time audio echo cancellation Flowchart:
key points of knowledge:
1, the purpose of ECHO cancellat
What if the computer suddenly has no sound?
Today, there is a strange problem, the computer suddenly no sound, just listen to the song when the computer also has a voice, and later with another friend with QQ voice through the words, no matter what play software (cool dog, chin listening, cool music box, etc.) play music, video, computer no sound. At that time, because the other one such as sound cards, small speakers, volume, etc. are normal. After a series of troubleshooting, it turned out th
For the majority of users, in the use of multimedia speakers will not be particularly fastidious, many users because of the product structure of the unfamiliar and lack of knowledge, often in the speaker after a small failure is also made to make use of, really can not re-change, in fact, many multimedia speaker repair is very simple, The average user can easily take care of it.
The following compilation o
A software operation is again skilled, but no practical application experience, can not fully play in the work process of the advantages of the software, is no use. Only by applying the knowledge, can we improve our skill level and improve our working efficiency. Below we take a multimedia speaker product screen printing process as an example, to explain the AutoCAD and CorelDRAW in the factory application, hope to be able to give some to embark on th
Android Bottom -up headphone Plug and audio channel switching instanceBecause headphones are used as separate headsets, the events are reported separately. The detection of headphone jacks on the Android system layer is based on /sys/class/switch/h2w/state values (in 4.4.4_r2 For example in Wiredaccessorymanager.java).A switch class -based h2w switch is implemented in the kernel as long as it is "true or false" . the Android system will be able to monitor the plug and unplug information. Insert
only need to edit a Hal of the following content. def file:
Code:Library Hal. dll
Exports
Exacquirefastmutex
Exreleasefastmutex
Extrytoacquirefastmutex
Halacquiredisplayownership
Haladjustresourcelist
Halallprocessorsstarted
......
Then, run the link/lib/machine: ix86/DEF: Hal. DEF/out: Hal. Lib command to generate the imported and exported file without the @ XX suffix. With this file, it will be much easier to handle. Let's start using Delphi to develop a simple driver beeper.This driver is c
likely to agree to what they don't actually want to do. Sometimes people may have different feelings. From this point of view, observation is a very knowledgeable technique. People's inner thoughts are sometimes verbally revealed unconsciously. Therefore, when talking with others, as long as we pay attention, we can know the inner world of others from the conversation.
① Be informed by the topic.People often present their emotions unconsciously from a topic. There are various kinds of topics. T
you are interested in occurs, call the callcallback function in the member function that triggers the event in the event object class.The following is a specific example. You will have a better understanding of the usage of the callback class.
// Test program file: Test. cpp# Include "Callback. H"// Speaker classClass Speaker: Public callback{PRIVATE:Int volume;Public:Speaker (int v): volume (v ){
you are interested in occurs, call the callcallback function in the member function that triggers the event in the event object class.The following is a specific example. You will have a better understanding of the usage of the callback class.
// Test program file: Test. cpp# Include "Callback. H"// Speaker classClass Speaker: Public callback{PRIVATE:Int volume;Public:Speaker (int v): volume (v )
Dolby Digital plus for tablets tries to compensate for weak speakerscan software optimizations make the speakers in today's tablets any better?
Dolby Digital plus for tablets, shown here in a preliminary form, is a reasonably successful software fix for a pervasive hardware problem-namely, the low-rent speakers in most tablets. Dolby
On most smartphones and tablets, speakers are an afterthought at best. While processor speed and core counts, graphical capability, amount of ram, and even pixel d
Http://bbs.ustc.edu.cn/cgi/bbsanc? Path =/groups/group_5/paper/d6370c1a5/d46bfb150/x792ebe45
The following advantages apply to the management of references:
1. a bib file can be maintained, and only one file can be maintained throughout your research career, just like a numberEach reference is a record, which is described by a unique ID (for example, the following martindsp00.For example, a typical document in my myreference. bib file is as follows:
@ Article {martindsp00,Author = "A. Martin and
phones of different people. Some people have little feedback, and some others have already reported a broken voice! It is estimated that there is a high possibility of speaker quality problems, because even if the capacitance resistance of the audio part is 5% or 10% precision (the device on the mobile phone is not so accurate !) It is impossible to make a big difference to this degree!
Next, let's take a look at Qualcomm's audio configuration file
If the sound comes from the front of the listener, the time difference (Phase Difference) between the acoustic wave and the right ear is zero because the distance from the sound source to the left and right ears is equal, at this time, you can feel the sound coming from the front of the speaker, rather than leaning towards a certain side.
When the sound intensity is different, you can feel the distance between the sound source and the
Some of my friends have an abnormal sound like electricity or noise in their microphones. The solution to this problem is as follows:
1. Whether your microphone is used to maximize audio mixing.
Solution: microphone, audio mixing volume up to 80% to 90.
2. Whether your microphone is in enhanced status.
Solution: remove the microphone. Some sound cards are not supported.
3. Is the connection between your microphone and your computer host faulty.
Solution: disconnect the microphone fro
events.
(5) If you want to set your own dubbing scheme, you can select the desired sound file in the "Program Event" list box and configure the sound, and click the "Save as" button in the "sound scheme" option group, open the "Save scheme as" dialog box. Enter the name of the audio file in the "Save this dubbing scheme as" text box, and click "OK. If you are not satisfied with the dubbing scheme you set, you can select the scheme in the Audio scheme option group and click "delete" to delete
The jbl white edition has arrived for a long time. Because the power supply parameter of the goods is 110v ~ 200 V, 110 ~ 220 V, so I chose the goods, because the power supply of the goods and the domestic input voltage does not match, a long time will affect the life of small J. After testing, I found that the jbl omnipotent connection between iPhone 4 and ipad2 is indeed extraordinary. The statement issued by Xiao J is different from the general speaker
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