I'll be honest, my app can be a bit buggy. However, I would not recommend most of those cards to record music, they are usually aimed at gamers. The latency and the performance would be better with a sound card that supports Dolby Digital Live, that's how they call the feature of soundcards that can encode to AC-3. It's usually higher than 40 to 50 ms because redocneXk outputs with directsound and because of the ASIO latency. The latency will never be lower than 32 ms. The encoding is done on audio blocks of 32 ms of data. You won't be able to keep the 6 to 8 ms latency. It might be possible to change this to support the sound card but I don't have time to work on this anymore and I don't think it fits your needs (read above and below). RedocneXk was made to take its source from a Creative soundcard ASIO inputs so it won't work with the m-audio firewire 410 because the input numbers are hardcoded to those used by the Creative ASIO drivers. I never looked into this so the encoder does not support it or it supports it and I'm not aware of it. There's a way to get 6.1 or 7.1 with a 5.1 encoding but it's not discrete channels, it's channels mixed into other channels that are extracted by the receiver. I already replied to deity by email but the reply might be useful to others so I'm posting it here too.

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