Splitting a midi keyboard into to channels.

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I'm not good on explaining how I did it. I split the keyboard at middle C into two different channels, But I have found the playback sounds like your sitting in front of the keyboard.
Here is a sample.
https://soundcloud.com/eino1953/beethov ... piano-solo
That's quite interesting.
Did you use an external tool to split the channels?
I used the keyboard it self with LMMS to map out the keys, into two different instruments in LMMS.
Similar to mapping controls from the keyboard to LMMS, but a little more complicated.
I found that if you can set the left side of the keyboard to midi channel 2, and leave the default channel 1 to the right side LMMS automatically splits the channels. I can with mine but, not all keyboards have the ability.