This tutorial assumes the student knows nothing.  Experienced Montage/MODX users should forgive the lengthy nature of this tutorial. The intention is a one-touch learning guide  with no need for constant cross referencing.

Reference:
This tutorial will use the song "Teardrop" by Massive Attack.

The constant "Heartbeat" drums on this track were sampled. It's a 1 Bar Loop slowed down.  This gives the beats an unusual tonal flavour... loose skinned Bass Drum and a Woody sounding Closed Snare Rimshot.

General Notes:
Tempo is between 72-78 BPM depending on your source.

4/4 Time signature, with minimum 1/16th Quantize Resolution (Sync Quantize Parameter = 120) recommended.

The Bass Piano and Treble Harpsichord imply an A Minor tonality, while the vocalist nonchalantly sings in A Major, only paying homage to A Minor when the Bass hits the F.  Both Piano and Harpsichord avoid playing the defining minor or major 3rd, keeping the minor/major ambiguity afloat.

The Harpsichord part can also be 2 Bar looped and "User" Arpeggiated... so give it a go.

I have saved you the labours of finding the right sounds.
That said,  you are free to choose whatever sounds you like.

Before You Start:-

Brief Performance Set Up
1. Start with Preset :  INIT Normal (AWM2).
2. Replace Part 1 with AWM2 Performance "CFX Stage".
3. Select Part 1, Edit - Part 1 - Common - Part Settings - Pitch - Note Shift =  -12. * See Notes Below
4. Add Part 2 - AWM2 "S700 for Montage"
5. Add Part 3 - AWM2 "Octave Harpsichord", Edit, Note Shift =  -12
6. Edit Key Ranges: Part 1 (D1 to A1), Part 2 (D1 to A1), Part 3 (A3 to E4)
7. Use the Sliders to set relative Volumes/Mix between Part 1 (sub octave piano), 2 (bass piano) and 3 (2 Octave Harpsichord).
8. Play it. Make sure you are happy.
9. Add Part 4 - Drum Kit - "D'elo Kit"
10. Turn Part 4 ARP Off.
11. Select Part 4 - Edit - Arpeggio - Advanced - Fixed SD/BD = OFF (Not lit). * See Notes Below.
12. Select Part 4 - Edit - Common
13. Select Drum Key (hard bottom-right) -  Keyboard Select ON (Press just above "Drum Key" ) - Play Piano Key E1 (you just selected the Drum Sound on E1 which is a Closed Snare RimShot = "Sd Beech ClRm St").
14. Go to Osc/Tune tab  (top left),  "Coarse = -6".
15. Go to  Level/Pan tab, "Level = 70". * See Notes.
16. Go to Performance/Home Screen. Turn OFF Keyboard control for Part 1, 2 & 3. This allows you to hear only the drums, and later, RECORD only the drums.
17. Hit the keyboard.  The "loose" Bass/Kick Drum is on B0, the Closed Snare Rimshot is on E1. Familiarise yourself with just these two keys and practice playing it....  BD-BD... BD-SD.

*Performance Notes
1. Remove or delete all Control Assigns and Effects (beyond the scope of this tutorial
2. Once deleted, don't worry.  You can easily add all that later to your liking.
3. Re: Snare Drum Rim Shot "Coarse Tuning". The original recording is a slowed down sample taken off a vinyl LP. Adjust the Coarse tuning to get that "Woody" sound... easier than messing around with EQ.
4. The Bass Drum sound on B0 is a sample of a "loose skin" bass drum, which sounds correct without any modification.
5. Re:  "Fixed SD/BD" ON/OFF.   This WILL cause you problems. All your carefully selected and sculpted Drum Parts will be ignored if you leave this ON.  Turn it OFF or your Arpeggios will play a Marching Drum and HandClaps.
6. Level the Snare Drum Rimshot down to 70. This reduces its "Accent", particularly as it is on Beat 2 and 4 (back beats). 

Creating a User Drum Arp with the MIDI Recorder.

Regarding the MIDI Recorder

1. This is the "old" or "legacy" method of MIDI recording on the MODX (before v2.5). It is the modern Digital/MIDI equivalent of the classic Cassette Tape Recorder (or D.A.T,  if anyone remembers those).
2. You have to play it right in one take. If you make a mistake, you must rewind/erase and start again from the beginning.  There are no "overdub" or "punch in" options or any other editing options.
3. The Good News is that you can use it to make a User Arp without any fuss on the spur of the moment. It is an immediate "pen & paper" scratch pad.

Detailed Instruction
1. Turn off Keyboard Control for Parts 1, 2 and 3. Leave it on for Part 4 Drums.
2. From the Home Screen, Press Tab Play/Rec.
3. Go to MIDI Tab.
4. Click in the Song Name Window and Rename to "TearDrop MIDI".
5. Press "Click Settings" in top right of screen.
6. Change Tempo to 72 BPM.
7. Check Time Signature is 4/4.
8. Set Precount to 1Meas (1 bar count in).
9. Press the hardkey Exit button to go back to the MIDI Recorder screen.
10. Press the Hardkey ● Record Button. It will flash, (Ready to Record).
10a. Check "Arp Rec" is ON (Top Right of screen)
11. Bass Drum is on key B0, RimShot is on key E1.
12. Practice it. Get Ready.
13. Press Hardkey Play Button (triangle). Your 1 Bar count in will play, and then it will start Recording.
14. Record a few Bars, then Press Stop.
15. Press Play and check it recorded OK.
16. Click the LOOP Button ON (Green)
17. Set Loop Start 1:01, Loop End 2:01 (1 bar).
18. NOTE:  Drums are on PART 4, so they are Recorded to TRACK 4. All the other tracks will be empty.
19. Click on Song Name.
20. Choose USER ARP,  Bottom Left Hand Tab.
21. Set Category to "Drum/Perc", Set Sub Category to "Chillout", Enter Name  "Teardrop MIDI ARP".
22. Set Arp Track1 to "4".... i.e. make Arp from Track 4 (see item 17 above).
23. Set Convert Type to "Fixed" (required for Drum Arps).
24. Set Measure Start 1, End 2  (1 bar).
25. Click "Store As User Arp" bottom right of screen.
26. Go back to Home Screen.
27. Select Part 4 and Edit.
28.  Go to "Common"... bottom row, bottom left.
29. Select Arpeggio - Common Tab (top left).
30. Set "Arp Play Only" to ON.
31. Go to Arpeggio - Individual Tab.
32. Click on Arp Name,  top of the list.
33. Select Category Search in left hand Screen pop-up.
34. Text search for "Teardrop" and Select your User Arp (Teardrop MIDI ARP). Hit Hardkey ENTER button to go back to Edit Part 4 - Common.
35. Click ADVANCED Tab.  Make sure "Fixed SD/BD" is OFF.
36. Set Trigger Mode to Gate.
37. Go to Arpeggio Common Screen.
38. Switch Arp Part ON.
39. Switch Arp Master ON.
40. Set HOLD to ON.
41. Set Sync Quantize = 120
42. Set Arp/MS Grid = 120
43. Go back to Performance Home.
44. Turn Keyboard Control ON for Parts 1, 2 and 3.
45. The Drums will start Arpeggiating (playing) as soon as you play any Key.
46. Hit the Hardkey ARP ON/OFF to stop the drums playing.

NOTE: You can change the song Tempo to 78BPM  if 72BPM is too slow. The Arp will follow suit and play at 78BPM.

NOTE:  There is also a 1/16th note Closed HiHat playing on the Record. The problem with the MIDI recorder is it will only record what you can actually play with your fingers in Real Time.  If you want to ADD the HiHats, you can ADD another D'Elo Part (Part 5), then make a another User Arp for the HiHats, and assign it to Part 5 (Track 5)... but then you burn 1 Part Slot

The easier way is to use the Pattern Recorder, which is next.

Creating a User Drum Arp with the Pattern Recorder

The method and set up is mostly the same as with the MIDI Recorder as described above.

Instruction
1. Store your performance as a new Name e.g. TEARDROP PTRN ARP.
2. Turn OFF Keyboard Control for Parts 1, 2 & 3 again.
3. Turn OFF ARP MASTER e.g  Top Panel [ARP ON/OFF].
4. Edit Drum Part, set ARP PLAY ONLY = OFF.
5. The closed HiHat is on F#1 for reference. Edit Drum Part 4 to turn down its Level (as per Rimshot in previous example). The 1/16th HH is very low in the mix.
6. Set Tempo to 72 BPM again.
7. Press ● Record button (flashing = Armed).
8. This should take you to Rec/Play - Pattern (not MIDI). If not, go to the Pattern Tab Screen
9. Click in the Pattern Name, Rename "Teardrop PTRN" ** (SEE BELOW NOTES).
10. Set Position 001 :01:00 (should default here).
11. Rec Quantize = 120
12. Set Length = 4** (SEE BELOW NOTES), Key On Start =:OFF, Loop = OFF.
13. Get Ready. Press Play. Start Recording BD and RimSht only after Count In.
14. Stop. Press Play to make sure it recorded.
15. Press Rec ● again (flashing). Set Record Type to OVERDUB.
16. Get Ready. We will add 1/16th HiHats on F#1.
17. Press Play to start recording. Play for only 2 or 3 Bars... not 4 (see below notes).
18. Press Stop. Press Play, check HiHat has been overdubbed onto Bass Drum and Rimshot.
19. Click on EDIT/JOB top right of Screen.
20. This will take you to the PATTERN OVERVIEW Screen.
21. If you wish click on "Save As .mid File". This will save a backup MIDI file to your USB Drive.
22. Click on USER ARP Tab (Bottom Left of Screen).
23. Set Scene 1, Start 1, End 2 (equivalent of 1 Bar)
24. Set Category = Drum/Perc, Sub Category = Chillout/Ambient, Name "TEARDROP PTRN ARP".
25. Set Track, Arp Track1 = 4. All others = OFF.  (As with MIDI you recorded with Part 4 onto Track 4.... therefore choose "4").
26. Set Convert Type = FIXED (required for Drum Arps).
27. Click "Store As User Arp",  bottom right of Screen.
28. Go back to Performance Home.
29. Turn Keyboard Control ON for Parts 1, 2 and 3.
30. Edit Part 4 Drums, Arpeggio - Common, set Arp Play Only = ON
31. Set HOLD = ON.
32. Go to Arpeggio -  Advanced. Set "Fixed SD/BD = OFF".
33. Set Sync Quantize = 120 (top centre screen).
34. Go to Arpeggio - Individual (click Top of list, Category Search). Set ARP 1 = "TEARDROP PTRN ARP"  (use text search function).  Press [ENTER].
35. Go back to Performance Home.
36. Set ARP ON/OFF = ON (Orange Light).
37. Play.

**NOTES: 
Regards Pattern Name.
For some reason if you Arm Record, then abort for any reason, the next time you Arm Record, a NEW Pattern will be loaded into the Slot.  For example when I first ran through this tutorial, it started on "NewPattern5". After several aborted attempts while I remembered to change other parameters (keyboard control for example), I noticed the Pattern Name was now "NewPattern10". 

I also checked Utility Storage... I now had stored Patterns "Teardrop PTRN" (originally NewPattern05), but also NewPattern06, NewPattern07, NewPattern08, & NewPattern09.  These were all EMPTY files, but had burned 5 of my limited Pattern Slots. Watch out for this.

Regards Pattern Length = 4. 
I don't know why, but if you keep playing up to or beyond the last Bar, it always seems to overdub the last notes you play (Bar 4, Beat 4) over Bar 1 Beat 1.  On playback you will hear "doubled" or louder notes on the first few beats. I assume these are unwanted overdubs. If your timing is slightly off, these sound like "slapback" notes, regardless of Quantize.  For this reason I Set length to 4, but only Record 2 or 3 Bars. I do not allow myself to overrun the end of the recording window.  These unwanted overdubs happen all the time if you overrun Length.  So always set Length to MORE than you actually want to Record.

STORAGE MANAGEMENT

All User MIDI "Songs", MIDI "Patterns" and ARPS can be found in

UTILITY - DATA UTILITY

SONG FOLDER = MIDI Recordings
PATTERN FOLDER = Pattern Recordings
ARP FOLDER = User Arps

If, like me, you end up with dozens of aborts, mistakes, retries, alternate versions etc  you will also leave all the "debris" in the folders described above.  I highly recommend you delete all the uneeded files once you have perfected your User Arp.