5) Let’s now configure the External Instrument insert: On ‘MIDI To’ choose ‘Reason’:
P.S.: When you select ‘Reason’ in this option, you are telling Live that you’re going to use an input signal coming from Reason.
6) On ‘Hardware Interface’ you can see listed all virtual modules already opened in your Reason project. I want to use the NN-XT Sampler with the Grand Piano patch that I created on step 3 (you can use any opened instance on Reason):
P.S.: This option tells Live which sound module from Reason you’re going to set to this specific Live channel.
7) On Audio From, you have to choose where the audio signal will be output. Choose the first option – “1/2: Mix L, Mix R” – which means channels 1 and 2, stereo:
As you can see, there are a lot of options, up to 64 audio channels to choose, as well as channel left or right alone, etc.
Notice that there’s also a Gain control in the External Instrument insert.
Now, when you play a key on the keyboard, the sound that you hear is the piano from Reason’s NN-XT.
You can open as many sound modules as you want on Reason. All you have to do is set each one of them to a new midi channel on Live. On each Live midi channel you have to insert a new External Instrument and set it accordingly.