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I have 2 sound cards: Realtek and Sound Blaster. I want to hear music with both at the same time. How? - sound blaster sb0480 buy

I have 2 sound cards: Realtek and Sound Blaster. Both work. Buthier want to open only 1 of Winamp and have to play both the sound card. I do it because I have 2 devices Speaker: A base speakers and two-way speakers with 5.1 Logitech subwooffer. I use both with two sound cards for music sounds louder subwoofer.
What I did is to create two programs open to the first Winamp Winamp Realtek card in the Council and the Sound Blaster cards with other winamp DirectSound output award. But what I want is the Logitech Speakers for Live Sound Blaster Connect is 24 and the speaker of the card based on Realtek and the sound from both speakers, when I click the play button. But I can not. So to be able to hear the audio, you have to press play and play Winamp immediately press the button in Winamp and try to synchronize the theme I hear.

Please, how can I configure winamp, with 2 devices for sound cards in 1 app?