Why does IAudioClient::GetMixFormat return 8 channels audio even if the system's sound card only has two channels?

Question

Yniar GL 0

为甚么 IAudioClient::GetMixFormat return 8 channels audio ,扬声器实际上仅支持 2 声道

captureClient->GetMixFormat(&m_wfex);

Jeanine Zhang-MSFT 11,356 Reputation points Microsoft External Staff

2024-09-30T02:52:04.0066667+00:00

According to the Doc:IAudioClient::GetMixFormat method

The mix format is the format that the audio engine uses internally for digital processing of shared-mode streams. This format is not necessarily a format that the audio endpoint device supports.

The GetMixFormat method retrieves the stream format that the audio engine uses for its internal processing of shared-mode streams. The method always uses a WAVEFORMATEXTENSIBLE structure, instead of a stand-alone WAVEFORMATEX structure, to specify the format.
Yniar GL 0 Reputation points

2024-10-08T08:41:42.9966667+00:00

那我怎么才能获取到音频设备正常的真正支持的音频格式信息呢

1 answer

Jeanine Zhang-MSFT 11,356 Reputation points Microsoft External Staff

2024-09-30T02:52:04.0066667+00:00

According to the Doc:IAudioClient::GetMixFormat method

The mix format is the format that the audio engine uses internally for digital processing of shared-mode streams. This format is not necessarily a format that the audio endpoint device supports.

The GetMixFormat method retrieves the stream format that the audio engine uses for its internal processing of shared-mode streams. The method always uses a WAVEFORMATEXTENSIBLE structure, instead of a stand-alone WAVEFORMATEX structure, to specify the format.
Yniar GL 0 Reputation points

2024-10-08T08:41:42.9966667+00:00

那我怎么才能获取到音频设备正常的真正支持的音频格式信息呢

Answer 1

Yniar GL 0

User's image

正常的应该是