I can't seem to get the buffer transfer rate lower than 480 on 48000sps using IAudioClient::GetBuffer in exclusive-mode. I'm initializing the audio client using 0 as the duration length. Note: I would like to specify that I'm explicitly referring to exclusive mode, not shared mode.

You put the question in a wrong way. GetBuffer gets you buffers of duration respectively to initialization of the audio client. You need to go back to Initialize call and request a shorter buffer from there.

Is the minimum latency supported for exclusive-mode wasapi 10 ms?

Accepted answer

Roman R 331 Reputation points

2021-02-24T07:57:27.817+00:00

You put the question in a wrong way.

GetBuffer gets you buffers of duration respectively to initialization of the audio client. You need to go back to Initialize call and request a shorter buffer from there.
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Tucker von Holten 21 Reputation points

2021-02-24T08:14:19.627+00:00

I worded my question poorly. I'm initializing the audio client using 0 as the duration length, then, regardless of what the value is initialized with (I always initialize with a value less than 10000), the GetBuffer call always returns a buffer size of 480 or greater.

Roman R 331 Reputation points

2021-02-24T09:10:57.077+00:00

If you initialize with default buffer, it is quite expected that you get 10 ms. If you need smaller you can have it, but you should also pay attention to minimal the device supports. For example on my dev system the minimal is 3 ms.

Tucker von Holten 21 Reputation points

2021-02-24T18:50:36.61+00:00

This is totally right. I was using the bufferduration parameter in init, which was wrong. I clearly should've been using the period length value. Thank you for your help! It is very much appreciated :)
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Is the minimum latency supported for exclusive-mode wasapi 10 ms?

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