waveOut functions for win32 applications - Programmers Heaven

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waveOut functions for win32 applications

Hi,

I have a few questions concerning the WaveOut... function available for VC++ that are cannot be found in the libraries.



1. Is there any delay from the time I invoke waveOutWrite, and send the audio to the device, to the time the sound device plays the sound out of the speakers.



2. Is there a minimum buffer size for the audio buffer that is sent to the device, in order to play it proper, or is that a specification with

in the sound device.



I am asking these questions because currently, I am creating a basic voice conference software for a project and I need to find out these technical

details to eliminate some latency problems. I would like to know what happens to the audio buffer in memory once it is sent to the device for playback.



- Is the entire buffer locked in memory while device is playing it? Or is

a set number of bytes of memory in the vicinity of the data the sound is

currently playing that gets locked?



- I am not sure if these properties are set within the win32 API or with

the sound device themselves but if you can shed some light on some of the

questions I have, answers or sources of information that can possible

lead to the answers, I would greatly appreciate it.



Thanks,

Noby


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