mixer

问题 Folks, I am working on an applet that captures audio from the local computer and streams it up to the server. I am using a Java applet that currently hooks onto the default device and performs the upstream. Things are running well. I now want to extend the functionality to allow users to choose the audio input device and to also show a sound level indicator of the chosen device in the web page. I wrote a multithreaded utility that would do AudioSystem.getMixerInfo(); periodically and look for

问题 I thought I can find anything on this great site but now I seem to face the issue with no answer :) Please help! Thing is, I need to play up to 6 different wav files with 1 channel each into 6 channels supported by system mixer (left, right, surround left, etc). Using 6 different SourceDataLines looks logical but from what I see, Mixer cannot do per-sample synchronisation for them, so I came up with interleaving them in separate thread and use only one SourceDataLine to play it. It works fine

问题 I wrote a code to open and control mixer volume: char *card, *channel; snd_mixer_t *handle = NULL; snd_mixer_elem_t *elem = NULL; static long alsa_min, alsa_max; void alsa_open_mixer( void ) { int err; static snd_mixer_selem_id_t *sid = NULL; if ((err = snd_mixer_open (&handle, 0)) < 0) return; if ((err = snd_mixer_attach (handle, card)) < 0) goto error; if ((err = snd_mixer_selem_register (handle, NULL, NULL)) < 0) goto error; if ((err = snd_mixer_load (handle)) < 0) goto error; snd_mixer

问题 I am creating a program for me and my friends to use. I want to make a program that will take control over the Windows Audio Mixer. I am using C# I already have and idea on how to control the volume. But I would like some tips on controlling each application's individual volume level inside the mixer. The main question is (a bit interesting) : How can I read the value of the volume inside each application's individual meter? In other words, I want to read/get the value of the green and grey

问题 How can I make a video and audio mixer with audio recording capability using nodejs. Also I want an editable waveform graph of audio. Is there any supporting package in nodejs? 回答1: Unless you are lucky enough to find a package that does exactly what you want, I suspect that using ffmpeg through a nodes wrapper of interface library such as the one below will be the easiest approach: https://github.com/fluent-ffmpeg/node-fluent-ffmpeg This allows you use all the power and large user community

问题 Here is a short snippet from my code: import pygame class Player(): playlist= ["track1.mp3","track2.mp3",...] def __init__(self): pygame.init() pygame.mixer.music.load(self.playlist[0]) pygame.mixer.music.play() def playnext(self): self.playlist = self.playlist[1:] + [self.playlist[0]] pygame.mixer.music.load(self.playlist[0]) pygame.mixer.music.play() My problem is that I want to play the next track after the first finished, but without a while true loop. This class is not the only one in my

问题 I'd like to use C# to implement an application that can play multiple audio streams at the same time. Peanuts - now the interesting part: assuming every stream is single channel (mono) I want to adjust the volume for every speaker (5.1 or even 7.1) for every stream separately. I can use the windows mixer to do this, but the problem is, that there is only one mixer and I want to adjust this for every stream separately. Any ideas how to implement this? My first guess was to multiplex the stream

问题 I am trying to control the Microphone Boost (level/(un)mute) in Windows 7 using the MIXER API in a C/C++ application, but I do not get the controls for the same. Can it be done using WASAPI? Can somebody suggest any other API to control the Microphone Boost in Windows 7? This is what I have written so far ... const IID IID_IDeviceTopology = __uuidof(IDeviceTopology); const IID IID_IPart = __uuidof(IPart); const IID IID_IAudioAutoGainControl = __uuidof(IAudioAutoGainControl); HRESULT hr = S_OK

问题 I`m trying to install Medooze but I faced with lots of problem! I followed step by step by this instruction http://www.medooze.com/products/media-mixer-server/installation.aspx most of them installed with out error until step 9. when I use "make" there are bunch of errors, I fixed many of them but when I trying to fix this one, I cant. /usr/local/src/medooze/mcu/src/gsm/gsm.h:34:32: fatal error: GSM3CircularBuffer.h: No such file or directory #include GSM3CircularBuffer.h> compilation

问题 I happen to be using Python bindings here, but I suspect that the problem, and the eventual answer, are not Python-specific. On Windows 10, using Python bindings to Windows' Core Audio library, specifically via pycaw.AudioUtilities.GetAllSessions() , I can see that there is a session with name 'conhost.exe' and pid 11512, and by elementary guesswork/experimentation I can see that this is the session that (a) governs the audio for my current process and (b) corresponds to the "Console Window