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diff --git a/guile/starlet/fixture-library/robe/mmxspot.scm b/guile/starlet/fixture-library/robe/mmxspot.scm
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+;;
+;; starlet/fixture-library/robe/mmxspot/mode1.scm
+;;
+;; Copyright © 2020-2021 Thomas White <taw@bitwiz.org.uk>
+;;
+;; This file is part of Starlet.
+;;
+;; Starlet is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;
+(define-module (starlet fixture-library robe mmxspot)
+  #:use-module (oop goops)
+  #:use-module (starlet fixture)
+  #:use-module (starlet attributes)
+  #:use-module (starlet colours)
+  #:export (<robe-mmxspot-mode1>))
+
+
+(define-fixture
+
+  <robe-mmxspot-mode1>
+
+  (fixture-attributes
+    (attr-continuous intensity '(0 100) 0)
+    (attr-continuous pan '(0 540) 270)
+    (attr-continuous tilt '(0 270) 135)
+    (attr-list colwheel '(#f red blue orange green amber uv) #f)
+    (attr-list prism '(#t #f) #f)
+    (attr-list strobe '(off on random zap) off)
+    (attr-continuous strobe-frequency '(0 100) 50)
+    (attr-colour colour white)
+    (attr-continuous iris '(0 100) 0)
+    (attr-continuous zoom '(0 100) 0)
+    (attr-continuous focus '(0 100) 0)
+    (attr-continuous hotspot '(0 100) 0)
+    (attr-continuous frost '(0 100) 0)
+    (attr-continuous cto '(3200 6900) 6900))
+
+  (set-chan16 37 (percent->dmxval16 (get-attr intensity)))
+
+  (set-chan16 1 (scale-to-range (get-attr pan) '(0 540) '(0 65535)))
+
+  (set-chan16 3 (scale-to-range (get-attr tilt) '(0 270) '(0 65535)))
+
+  (set-chan16 28 (scale-to-range (get-attr iris) '(0 100) '(0 45567)))
+  (set-chan16 30 (percent->dmxval16 (get-attr zoom)))
+  (set-chan16 32 (percent->dmxval16 (get-attr focus)))
+
+  (set-chan8 36
+             (let ((strb (get-attr strobe))
+                   (spd (get-attr strobe-speed)))
+               (cond
+                 ;; FIXME: Check the frequencies
+                 ((eq? strb 'on) (scale-to-range spd '(0 100) '(64 95)))
+                 ((eq? strb 'random) (scale-to-range spd '(0 100) '(192 223)))
+                 ((eq? strb 'zap) (scale-to-range spd '(0 100) '(160 191)))
+                 (else 255))))
+
+  (set-chan8 25 (if (get-attr prism) 20 0))
+
+  (set-chan8 7 (assv-ref '((#f . 0)
+                           (red . 18)
+                           (blue . 37)
+                           (orange . 55)
+                           (green . 73)
+                           (amber . 91)
+                           (uv . 110))
+                         (get-attr colwheel)))
+
+  (let ((cmy (colour-as-cmy (get-attr colour))))
+    (set-chan8 9 (percent->dmxval8 (car cmy)))
+    (set-chan8 10 (percent->dmxval8 (cadr cmy)))
+    (set-chan8 11 (percent->dmxval8 (caddr cmy))))
+
+  (set-chan8 35 (percent->dmxval8 (get-attr hotspot)))
+  (set-chan8 12 (scale-to-range (get-attr cto) '(3200 6900) '(0 255)))
+  (set-chan8 27 (scale-to-range (get-attr frost) '(0 100) '(0 179))))