>ASIO4ALL notoriously does not play nice with multiple audio sources. Yep, that's because Asio4all uses WDM-KS and WDM-KS since Vista doesn't support multiple

>ASIO4ALL notoriously does not play nice with multiple audio sources. Yep, that's because Asio4all uses WDM-KS and WDM-KS since Vista doesn't support multiple sources. Actual ASIO drivers made by sound card manufacturers usually don't have this limitation, as long as you keep the same sample rate everywhere. But it can also vary depending on who made the driver and/or on whether the source apps are using ASIO or a mix of ASIO and WDM/WASAPI. Getting low latency audio to work nicely on Windows can be messy (compared to macOS, at least).