Congrats pilgrim * makes sign-of-the-dave *
I have the model 4A which has 1 x channel for effecting, but there are ways to make the interface let you use masks and chroma on 2 layers and a 3rd background - so maybe you can do this on 3 or 4 layers.
The interface is quite fiddly and confusing - here are my notes (otherwise I have to re-learn each time I turn it on!):
# Magic DaVE (4A) Quickstart
Blessed is DaVE.
# Intro
MENU button interchangeably acts as go-up one level or return to the last menu section you viewed (it's unclear when it will do either).
When the T-bar is moved watch what LEDs light up - it helps indicate what settings are being controlled.
Colors are measured in HSL (hue, saturation, lightness):
HUE:
0 - 60 - 120 - 180 - 240 - 300
RED - YELLOW - GREEN - TURQOISE - BLUE - PURPLE
SAT / LIGHT:
0% - 100%
MIN - MAX
The main joystick will control 3 parameters left-to-right in the menu system:
X AXIS = 1st parameter
Y AXIS = 2nd parameter
Z AXIS (TWIST) = 3rd parameter
The XYZ buttons reset parameters to defaults (but are occasionally odd, for example with Y scaling between NTSC and PAL).
When turned on the controller will try to connect to the mainframe, and should automatically, and flash a bit. If not, select the connection from the menu.
# Sources / Structure
On a 4A, there are three video layers:
3 DVE - top layer with keying + effects (DVE-F)
2 DSK - top layer with keying (DSK)
1 BKGD - raw bottom layer (BKGD-A)
NULL DVE-B - not used on a 4A
NULL BKGD-B - not used on a 4A
DVE and DSK can be swapped to be the uppermost layer using the TOP button (and the LED toggles between each button).
DVE layer is where all the FX and majority of button menus do things. Any layer can be any video input, or an internal MATTE (colour) or PATTERN (gradients etc).
BKGD will always be the bottomost layer. DVE and DSK can be interchanged as uppermost with TOP button. To test this out, luma key out both DVE and DSK (via LUMA button), to reveal BKGD-A below.
# Arranging Sources
KEY, PROGRAM and PRESET buttons are confusing because they don't act as individual source selectors. Instead:
DVE-F/DVE-B/DSK/BKGD-A/BKGD-B BUTTONS = select the layer that you will now change via KEY BUS buttons;
KEY BUS (yellow buttons) = selector for the source that's currently selected
PROGRAM (red buttons) = BKGD-A, and the bottom-most layer (when BKGD-A source is selected, you will also see PROGRAM changing to the same)
PRESET = presets, I guess
# T-Bar
T-Bar will control the 2nd parameter along in whatever menu you have up, unless you've pressed WIPE or MIX. When changing a menu parameter, WIPE and MIX are deselected and USER lights up. Selecting USER again will let make the T-Bar wipe that same parameter again - if DaVE allows it (DaVE is ).
BKGRND/DVE/DSK = puts it into next transition
CUT = instant cut between sources
REV = reverses WIPE or SEQUENCE (apparently)
STOP = stops any sequence running, or goes to beginning of sequence when stopped
TAKE = starts sequence, with time specified via Transition Control
NB: if you're trying to arrange 3 layers, then the T-Bar and these buttons will often "reset" settings around the assumption you're wiping two sources, and shunt settings into the submenus for the 3rd layer not being wiped. There's no indicator for any of this, so you'll lose orientation. Try n' feel it out (praise DaVE).
# Getting Complicated
You can created multi-layer wipe blended scenes, by keeping NEXT TRANSITION to DSK, then using the DVE to crop and mask.
EXT-KEY = define the wipe for the top layer DVE, in which case, you can;
Navigate to DVE > EXT-KEY > MASK and then press-and-hold USER-[N] to save the menu view. Now when you press the USER-[N] button the T-Bar will wipe the DVE. When you press the default WIPE button you will wipe the DSK - ie. TRIPLE LAYER WIPES c'est possible.
# External Keying
Not so clear - there are two multi-toggle options under EXT-KEY option. Mashing these around and the input on the isolated "KEY I/O" port on the mainframe will be used (but without any threshold parameters).
# Transition Select
1) SUPER = dissolve with a colour matte
2) MIX = normal dissolve wipe
3) WIPE = shape wipe
4) SEQUENCE = a preprogrammed sequence (see sequencing)
5) USER = whatever the current menu page is, or was
6) BLACK = black
# DVE Control Group
All these are "quick-access" buttons to change parameters for the DVE top layer, and the same as having pressed MENU > START > MAIN;
1) MODEL = wipes like page turn, ripples etc
2) LIGHT = lighting effect
3) EFFECT = solarisation, polarisation, colour keying
4) SHADOW = shadows for MODELs, inc. trail-shadow...
5) BORDER = borders around wipe or layer rectangle
6) CROP = cropping the layer rectangle
7) TRAIL = only on some systems, doesn't work on mine
8) FREEZE = freeze frame
# DVE Transition Group
TRANSFORM = submenu for DVE
REFLECT = use back and front image
INPUT = position of input, before;
PRE = position of image, before;
MAIN (aka POSITION) = position of DVE, before;
OUTPUT = position of entire output
POSITION (aka TRANSFORM -> MAIN) = position (4 options)
ANGLE = main angle (3 options)
AXIS = main axis (3 options)
SPIN = main spin (3 options)
SIZE = can be accessed by pressing TRANSFORM twice; use to resize from PAL or NTSE (2 options)
# Wipe / Sequence / Alpha Controls
There are 24 buttons with pictures of wipes on them; these are also used to select sequences (SEQUENCE) or letters (ALPHA).
WIPE = enable selecting a wipe from the 24
SEQUENCE = enable selecting a sequence form the 24
ALPHA = enable selecting a big letter from the alphabet (uhhh)
USER 1/2/3/4 = press + hold to store a wipe here, press once to recall
# Sequencing
The 4A can store 24 "sequences" in RAM, made up of many "shots" (configurations of local settings, from Transform Groups), then assigned to the T-Bar, or played back via TAKE.
ENABLE = when flashing, you are in edit mode
INSERT = adds current settings as new shot
PREVIOUS = loads previous shot, or previous sequence
CURRENT = reloads shot, or reloads sequence
NEXT = loads next shot, or next sequence
DELETE = deletes current shot
UNDO = undoes last action (max 100)
MODIFY = sets shot to current local settings (ie. SET)
-> HERE <- = only save to current shot
<- MODIFY = also save to preceding shots
MODIFY -> = also save to proceeding shots
<- ALL -> = also save to all other shots
PROPERTIES = edits encompassing sequence settings
In editing mode, time is related to the shot, in sequence mode, to the sequence time.
# System Buttons
SETUP = internal system settings
DISK = internal storage settings
FILE = internal EPROM settings
ABOUT = firmware version, model etc
USER 1/2/3/4 = press+hold to store the current menu view, so that it can be recalled
# Keypad Group
NUMERICAL KEYS = type in numbers
DELETE = acts as backspace, not delete
ESC = acts as delete / undo
ENTER = numbers must match exact decimal places to be entered (ie. 1.000 => 0.120, and not 0.12)
CURSOR = enables "preview output cursor"? no idea.
# Misc Controls
SNAP = snaps parameters to power of 2
MAGIC = "reserved for future use" 🛸
NORMAL = resets different controls
ONE-PRESS = reset current controls
TWO-PRESSES = opens menu to select resetting all controls (Internal and External)
THREE-PRESSES = reset everything (aka: fuck-it)
SAVE = save current sequences
ONE-PRESS = bring up menu
TWO-PRESSES = "allows DMEM to be saved"
THREE-PRESSES = will actually save
RECALL = same as above, but recalling sequences
CANCEL = cancel
OK = enter key
# Whole Menu
You can navigate the entire system, via the MENU button, where the physical interface acts as a submenu quick-select.
MENU
START
MODELS = goes to top-level MODELS menu (DVE only)
TRANSFORM = goes to top-level TRANSFORM menu (DVE only)
EFFECTS = goes to top-level EFFECTS menu (DVE only)
WIPES = goes to generic WIPES menu
SOURCES* = select "KEY-BUS" source via menu, allows you to view cool test patterns and shapes
FREEZE = goes to FREEZE menu (DVE only)
TRAIL = goes to TRAIL menu (DVE only)
CHANNEL = goes to CHANNEL menu (different mainframes)
SEQCACHE = akin to SEQUENCE buttons (recall, save etc)
SEQCTRL* = granular control of sequences
FILE*
DISK*
SETUP*
* = menus that aren't available by one of the front panel buttons