microphone

问题 Is there any provision in android or ndk by to know which user application is using which system service? OR another way by using pid:- Suppose i have an application which uses microphone, microphone is opened by the system service (named media serv).I can manage to get the pid of above service(media serv).Now i want to know which user application is using the the pid of above service(media serv). 回答1: If you are the implementer of the system service -- such as via creating your own fork of

问题 I was trying to adjust playback volume level of microphone; but unfortunately I couldn't. I can control recording volume of microphone by using NAudio library but I want to control playback volume. Is there any way to control microphone playback volume on windows 7. Either C++ or C# solution is acceptable for me. Here are some attempts to solve my problem: http://www.computercabal.com/2010/11/mute-microphone-from-c-on-windows.html (This guy wrote a small library that can mute microphone

问题 Can the windows phone 7 in-built microphone detect frequencies higher than 18kHz? 回答1: Technically yes, the API supports recording PCM with sufficient quality to express a 18kHz sine wave. Standard POTS lines and even T1 lines generally operate at 8 kHz 16 bit which is mathematically enough to correctly record a max of 4 kHz. And since the mic isn't usually used for anything higher quality than telephony audio, I bet the limiting factor will be the hardware... your mileage will definitely

问题 Im trying to create an Analyser node to get the signal from a microphone, and be able to create a graphic with the received input. But I dont want to the speakers to still recive the microphone signal. Source ( microphone ) -> Analyser -> Destination( ? ) The destination is always the speakers... Can I put the destination to a void or similar, and be able to still analyze the microphone? I tried to play with the Volumne (gain node) but that affects the analyser in the end. In summary: I need

问题 How can I determine if access to the camera and mic were denied in Flash? I can get the camera and mic, but I need to know if the user denied access. 回答1: Attach a status event listener and check if the camera is muted, see docs: Dispatched when a camera reports its status. Before accessing a camera, the runtime displays a Privacy dialog box to let users allow or deny access to their camera. If the value of the code property is "Camera.Muted", the user has refused to allow the SWF file access

问题 Assume one client wants to enable camera only and another client wants to enable microphone only. How to set in Chrome / Firefox? 回答1: Firefox version >46.0 setting: Right Click at the page you want > View Page Info > Permission (tab) > Use the Microphone -> Allow. 回答2: In Firefox, type about:permissions in the location/address bar to access the Permissions Manager, where you can set global as well as per-website permissions for several actions and devices including camera and microphone -

问题 Hy! Is there a possibility to use the microphone to get an audio stream? The capture API from Phonegap is only able to save the audio file before accessing the data. I want to analyse the audio stream in real-time and can't find a way to do this. Thank you, Chris 回答1: The phonegap-plugin-media-stream plugin exposes your microphone as a WebRTC stream, so you can do any analysis WebRTC supports. 来源： https://stackoverflow.com/questions/32796345/phonegap-microphone-stream

问题 I'm looking to build a Morse decoder (and eventually a coder) in C. I'd like to use the audio port as input, and sample the incoming voltage on the port. How do I go about reading the voltage on a microphone audio port in Windows using C? 回答1: The simplist way is to use the waveIn functions provided by the Win32 API. You can read Recording and Playing Sound with the Waveform Audio Interface for an overview, or just dive into the API documentation. 来源： https://stackoverflow.com/questions

问题 In my app, I will be using a microphone to do some recording. From iOS7.0 onwards, the user is asked to check the permission to access the microphone before starting the audio. I have a button 'Start Recording' in my app. Here it first checks the user's permission for recording. Here's the code to do this: if([[AVAudioSession sharedInstance] respondsToSelector:@selector(requestRecordPermission:)]) { [[AVAudioSession sharedInstance] performSelector:@selector(requestRecordPermission:)

问题 I'm currently searching for options on how to manipulate audio on android. The goal is to process audio from the microphone in real time during a phone call. The best solution would be to do this on a native call. But rebuilding a telephone app (no VOIP) would be fine too. Are there any ways to achieve this with Android APIs (also undocumented)? If not, which steps would be necessary to get things running? On iOS there are some apps which manipulate voice but create a VOIP connection. I heard