core-audio

In windows 7, if one right clicks on the speaker icon in the taskbar, clicks playback devices, opens properties for one of the devices tab, then clicks the enhancements tab, one gets a list of filters ("Bass Boost" etc) that can be applied to that sound device. How can I register my own custom filter here? Please note that I am not an IHV - horrible hacks involving unsigned drivers, etc are acceptable, as this will be primarily for my own use. If you're an audio IHV you register them with your INF. The reference pages for them can be found here . Please note that to be used with Windows, sAPOs

I'm using two third party tools in my project. One is "The Amazing Audio Engine" . I use this for audio filters. The other is GPUImage, or more specifically, GPUImageMovieWriter . When I record videos, I merge an audio recording with the video. This works fine. However, sometimes I do not use The Amazing Audio Engine and just record a normal video using GPUImageMovieWriter. The problem is, even just after initializing The Amazing Audio Engine, the video has only a fraction of a second of audio at the beginning, and then the audio is gone. + (STAudioManager *)sharedManager { static

According to Apple's description, the aurioTouch sample app is suppose to "get the audio input and copy it to the output", which I think means that the app will playback/thru any sound the iPhone's mike picks up through the iPhone's speakers. When I loaded the app onto my iPhone (updated to 2.2), however, the playthru feature does not seem to work at all. The on-screen oscilliscope reponds as expected to voices and sounds, so the audio input half of the app is clearly working. Yes, I have tried toggling the app's "MUTE" button, and yes, I made sure the iPhone's "ringer/silent" switch is not

I am playing with CoreAudio on the iPhone, and I am unable to find how to know when the song has finished to play. I put a property listener on kAudioQueueProperty_IsRunning , it is working when starting playing but not at the end of the file. It's work when I stop AudioQueue... Do you have an idea ? Thanks a lot. PS : I am using sample code from the excellent book iPhone Cool Projects : http://apress.com/book/downloadfile/4453 Edit : there’s a bug in the code that went out with the book. The fix requires a small modification to -[AudioPlayer audioRequestDidFinish:] so that it calls [queue

I've searched around but haven't found any good examples or tutorials of saving audio out of a RemoteIO Audio Unit. My setup: Using the MusicPlayer API, I have several AUSamplers -> MixerUnit -> RemoteIO Audio playback works great. I would like to add functionality to save the audio output to a file. Would I do this in a render callback on the RemoteIO? Any tips or pointers to example code much appreciated! Due to the tight latency requirements of Audio Unit callbacks, one should not to do any synchronous file access (or any other calls that could potentially block, involve memory management