Thank you for the reply. Since you don't use different buffering technique in exclusive mode, I'm afraid that there is a bug in Win7 audio subsystem because NAudio with exclusive mode works well in Win8/8.1 over .NET 4.0 but record gaps in Win7 over the same .NET 4.0.
Looks like I should learn about WASAPI and write a WinAPI test application to trace it completely. :)
Looks like I should learn about WASAPI and write a WinAPI test application to trace it completely. :)