I set the Yamaha DGX-305 to local off so that instead of playing its own sounds, it would play those of tacks set in a project. Setting both a midi and instrument track to all midi inputs , or just to the 305, I hear no sound when I play keys. The midi does register, as seen by the blue vertical line, but the Halion doesn’t even do this. I had done before and can’t figure out what might be wrong.
To start with the usual question: Is there any sound loaded in Halion Sonic? Is that sound’s slot routed to the correct midi channel in Halion Sonic? In your screenshot’s example that would be channel 1.
Yes, when I play that channel the Halion sounds.
So today I set the piano for PC1 mode, local off, keyboard out and I had a harp sound loaded into Halion. I played a key a few times and then it kept playing that back like it had recorded somewhere. I think when I played the track, it played that also. I tried some other Halion harps and didn’t (the ‘recording) hear it any more while the track played normally, And then when I played the keys again back to there was no sound, like yesterday, even after going back to the original harp. And like yesterday, when playing a key (with no sound) midi tracks with all inputs (or the 305) selected blue vertical line indicates activity, but not with similar instrument track. More of C15’s craziness?
So in Halion, do you actually have to load a program into a slot before you can hear it. I thought you could click on anything in the list and hear it, but I do hear nothing.
I assume that the arpegio MIDI track shal be routed to the arp instrument track. Right.
In this case while monitoring is on as shown in your screenshots both tracks should show the same activity.
Are you sure that arpeggio is routed correctly to the right Halion instance ? Maybe you have more than one Halion instance loaded. Press F11 to see, which instruments you have loaded.
there was only one Halion and it was a instrument track.
Now I dragged from the rack a new one, and it shows as a midit and added a Halion main track at the bottom, which was absent before.
So if I press a key on the piano keyboard, the new Halion midi channel lights up with the rest of the midis, while only the Halion instrument doesn’t. No sound with any though.
I thought, maybe it needs to be setup as an external instrument, so I went there and added, but the choices for return are SL16R, where the audio outs of the other midi unit are plugged in, or not connection. It doesn’t go there directly because it is USB, so I don’t know.
May other keyboard, Peavey DPM-C8 is connected to the MIDI Express 128, where all my other midi devices are connected and playing it can be assigned to any of them, but when I play it, it doesn’t register anything in Cubase, on those midi parts.
A VSTinstrument is a sample player program, and doesn’t sound unlees you’ve loaded a sample (soundfile) into one of the slots. Midi events does’nt make any sound by themselvs, but can trigger a sound in an instrument.
I am confused. I don’t remember how I got the 1st one in, it is a track, assigned to channel 1 midi, and to Halion Sonic 1 (main). the harp sounds when I play.
The other is rack, organ, assigned to midi channel 3. It is routed to I put in the same Halion, but only 1 lights on the track when playing. Both light on the track when playing but only the harp sounds, and only that lights in the Halion mixer.
In the other Halion, the organ is in slot on and though there is nothing in 3, both light here when the track is played but only the harp sounds. I am wondering how I would get 2 different sounds with associated different tracks assigned to different midi channels in the same Halion, where both play their respective parts.
Don’t do that 
If you desperately want to do that for some reason, add a separate midi track for your second midi, and route that midi track to the same midi channel as the second program you have loaded in Halion. The picture below shows the second midi track routed to the second program on midi channel 4.
For simplicity though:
- If you want multiple programs (sounds) within Halion to simultaneously play the same midi, set them all to the same channel (i.e. channel 1).
- If you want multiple Halion programs (sounds) to play separate midi, start a separate instance of Halion for each one. This is much easier and faster.
It used to be necessary to stack midi files into one instrument to save memory and CPU but it is no longer needed with any computer approaching modern.
Note that the above advice is aimed at simplicity, not at the veteran user running rack instruments for their 1500 track symphonic theater odyssey