With the introduction of Vista and Win7, Microsoft changed the behavior of sound devices where the user has more control of the low-level parameters and the default sampling rate parameter was set for playing CD music at 44.1 KHz. Unfortunately this ideal situation does not exist therefore you must take this process of sample rate conversion into consideration when setting up PowerSDR to transfer audio to a third-party application. Ideally your source and destination sampling rates would be the same resulting in no sampling rate conversions.
When transferring an audio stream between two software process such as PowerSDR and a digital mode application using VAC (virtual audio cables) one consideration is sampling rate conversions at different steps in the audio signal path.
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