Maybe try setting up a performance with each PART assigned to something - just an example (all are single part - no multi-part just for ease of documenting):

PART 1 = bass
PART 2 = electric piano
PART 3 = guitar
PART 4 = strings
PART 5 = drums
PART 6 = fret noise
PART 7 = synth
PART 8 = organ
... and so on if you want to populate all 16.

Then go into the PART zone control and set each zone's MIDI channel to the part number. This will override the setting of MIDI mode = single.

Store this as some kind of "Zone Override" performance.

See if that helps.

At the 100 ft level - ARP recording basically records a .mid file which means something to the ARP performers depending on the various settings and what your trigger(s) are directing the ARP performers to do. It's this .mid file part that I could see getting "thrown off" by the single/multi channel mode.

I don't have a way to test that here - so just making a shot-in-the-dark suggestion.

EDIT: maybe just start with one part (PART 1) and edit the zone setting to set it to MIDI ch 1 instead of adding multiple PARTs at first.

Gabi wrote:

Recording and arp from a one part bass and just noticed ARP REC mode does not work when set to single midi. But why? Why do I need multi midi channels for a single part instrument?

Gabi,
It has to do with how the Arpeggiators are implemented into the synthesizer. When you send MIDI Out from the Montage normally the keys you press and the controllers you move are sent as MIDI Note-On messages (9n) and Control Change messages (Bn). When you place an Arpeggio in the Montage setup, the Note-On and Controller messages will be generated by the Arpeggiator. The notes you play are analyzed by the Arpeggiator and according to the type selected, a specific different set of data is sent Out via MIDI.

The external device, be it a sequencer or synth modules, cannot tell the difference between *you* pressing the Keys and moving the Controllers and the *Arpeggiator* generating the Note-On and Control Change messages. To the external device, the data is just coded messages, it makes no distinction because there isn't one. It simply sees MIDI data telling it what to do.

You are not "playing" the bass - the Arp is "playing" the bass. You get into trouble when you forget the notes being generated are NOT generated by you pressing every key directly. Perhaps just the lowest not you play is telling the bass Phrase what key to play in... you are not playing every note generated, you are silently triggering a phrase. Your trigger note is NOT even heard as a bass sound.

Now let's say you have a 3 Part Performance with Bass played by Arp, Drums played by Arp, and Piano played by you (no Arp).

Your key presses are not heard through the Bass Part, the data is analyzed, your direct key presses are blocked, and the appropriate Arp Phrase is Output on Channel 1
Your Key presses are not heard through the Drum Part, the data is analyzed, your direct key presses are blocked, and the appropriate Arp Phrase is triggered instead, on Channel 2
Your key presses are registered and heard via the Piano Part, and Output on Channel 3

When MIDI I/O Mode = Single - Only your Direct Key presses are Output via MIDI, this way you can record your performance Out via MIDI. Then on playback you would reset and re-arm the Arpeggiators so they can analyze and reproduce your exact performance. Your external Sequencer records just what YOU played.

When MIDI I/O Mode = Multi - your Direct Key press are Output via MIDI on the Channel of the Part when no Arp is assigned. If an Arp is assigned, your key presses are blocked, and the selected Arp Phrase is Output as MIDI data instead. On playback, you disarm the Arpeggiators because the MIDI has been transferred to the external recorder. Your external Sequencer records what is sent out by each Part... Arp if assigned, Direct if no Arp is assigned.

The Signal Flow diagrams will show when Single I/O mode is selected, the data going Out via MIDI does not travel through the Arpeggiator. Rather it is Output separately.

Thanks BadMister. That explanation makes sense, isn't terribly complicated, and looks pretty easy to implement by we end users. One question: when switching Quick SetUps, does this happen automatically? Thanks again.

Tommy, no the Quick setups do not change the midi setup auomatically. I was in single midi mode and went to quicksetup arp rec and it did not record the arp notes beacause it did not change automatically to multi channels.

"When MIDI I/O Mode = Single - Only your Direct Key presses are Output via MIDI,"
Ok, thank you, not really undertstanding the reason behind this but if that´s the routing then so be it.

I have some inverse problem, montage set to to multi, note recorded in my daw but the note played from the daw don't play the arpegiator...it's normal? The arpegiator can only be played from the montage keyboard?

You need the correct MIDI signal flow correct to do what you want.

https://www.yamahasynth.com/forum/audio-routing-problem#reply-15546

MIDI in needs to go through the arpeggiator.

By the way - it's very non-optimal design (Yamaha) to have this template selection feature and not show what, if any, is the currently selected template. Not only has it confused users who expect it to work one way (and it doesn't) - but documentation is somewhat hindered by not self-indicating which is the currently selected template. We must rely on clear descriptions to discern this - which is rarely the case. Of course, one could press all the profiles until they "land" on a picture that matches - but that's hardly a great way to tell users how to match a screenshot (although it works). I'm not saying it's broken beyond belief - but it's just not optimized to be the best it could be.

Yes this is the correct signal flow...now I retry....

Ok now it's OK, maybe something goes wrong the last day...:)