diff --git a/src/components/GridLattice.vue b/src/components/GridLattice.vue
index 30ec36e9..b569264f 100644
--- a/src/components/GridLattice.vue
+++ b/src/components/GridLattice.vue
@@ -12,7 +12,16 @@ const props = defineProps<{
   labels: string[]
   colors: string[]
   heldNotes: Set<number>
+  baseMidiNote:number
+  onTouchStart:TouchEventCallback
+  onTouchEnd:TouchEventCallback
+  onMouseDown:MouseEventCallback
+  onMouseUp:MouseEventCallback
+  onMouseEnter:MouseEventCallback
+  onMouseLeave:MouseEventCallback
 }>()
+type TouchEventCallback = (event: TouchEvent, index: number) => void
+type MouseEventCallback = (event: MouseEvent, index: number) => void
 
 const svgElement = ref<SVGSVGElement | null>(null)
 
@@ -127,6 +136,13 @@ watch(() => store.modulus, computeExtent)
       :fill="colors[v.indices[0]] ?? 'none'"
       :stroke="colors[v.indices[0]] ?? 'none'"
       :stroke-width="store.size * 0.1"
+      @touchstart="onTouchStart($event, props.baseMidiNote + v.indices[0] + 1)"
+      @touchend="onTouchEnd($event, props.baseMidiNote + v.indices[0] + 1)"
+      @touchcancel="onTouchEnd($event, props.baseMidiNote + v.indices[0] + 1)"
+      @mousedown="onMouseDown($event, props.baseMidiNote + v.indices[0] + 1)"
+      @mouseup="onMouseUp($event, props.baseMidiNote + v.indices[0] + 1)"
+      @mouseenter="onMouseEnter($event, props.baseMidiNote + v.indices[0] + 1)"
+      @mouseleave="onMouseLeave($event, props.baseMidiNote + v.indices[0] + 1)"
     />
     <template v-if="store.showLabels">
       <template v-for="(v, i) of grid.vertices" :key="i">
@@ -139,6 +155,13 @@ watch(() => store.modulus, computeExtent)
           :font-size="`${2.5 * store.size}px`"
           :stroke-width="store.size * 0.05"
           dominant-baseline="middle"
+          @touchstart="onTouchStart($event, props.baseMidiNote + idx + 1)"
+          @touchend="onTouchEnd($event, props.baseMidiNote + idx + 1)"
+          @touchcancel="onTouchEnd($event, props.baseMidiNote + idx + 1)"
+          @mousedown="onMouseDown($event, props.baseMidiNote + idx + 1)"
+          @mouseup="onMouseUp($event, props.baseMidiNote + idx + 1)"
+          @mouseenter="onMouseEnter($event, props.baseMidiNote + idx + 1)"
+          @mouseleave="onMouseLeave($event, props.baseMidiNote + idx + 1)"
         >
           {{ labels[idx] }}
         </text>
diff --git a/src/components/JustIntonationLattice.vue b/src/components/JustIntonationLattice.vue
index 8b4767bc..1aacf947 100644
--- a/src/components/JustIntonationLattice.vue
+++ b/src/components/JustIntonationLattice.vue
@@ -11,9 +11,19 @@ const props = defineProps<{
   relativeIntervals: Interval[]
   labels: string[]
   colors: string[]
-  heldNotes: Set<number>
+  heldNotes: Set<number>   
+  baseMidiNote:number
+  onTouchStart:TouchEventCallback
+  onTouchEnd:TouchEventCallback
+  onMouseDown:MouseEventCallback
+  onMouseUp:MouseEventCallback
+  onMouseEnter:MouseEventCallback
+  onMouseLeave:MouseEventCallback
 }>()
 
+type TouchEventCallback = (event: TouchEvent, index: number) => void
+type MouseEventCallback = (event: MouseEvent, index: number) => void
+
 const svgElement = ref<SVGSVGElement | null>(null)
 
 const viewBox = reactive([-1, -1, 2, 2])
@@ -186,6 +196,13 @@ watch(
       :fill="colors[v.index!] ?? 'none'"
       :stroke="colors[v.index!] ?? 'none'"
       :stroke-width="store.size * 0.1"
+      @touchstart="onTouchStart($event, props.baseMidiNote + v.index! + 1)"
+      @touchend="onTouchEnd($event, props.baseMidiNote + v.index! + 1)"
+      @touchcancel="onTouchEnd($event, props.baseMidiNote + v.index! + 1)"
+      @mousedown="onMouseDown($event, props.baseMidiNote + v.index! + 1)"
+      @mouseup="onMouseUp($event, props.baseMidiNote + v.index! + 1)"
+      @mouseenter="onMouseEnter($event, props.baseMidiNote + v.index! + 1)"
+      @mouseleave="onMouseLeave($event, props.baseMidiNote + v.index! + 1)"
     />
     <template v-if="store.showLabels">
       <text
@@ -197,6 +214,13 @@ watch(
         :y="v.y - store.labelOffset * store.size"
         :font-size="`${3 * store.size}px`"
         :stroke-width="store.size * 0.08"
+        @touchstart="onTouchStart($event, props.baseMidiNote + v.index! + 1)"
+        @touchend="onTouchEnd($event, props.baseMidiNote + v.index! + 1)"
+        @touchcancel="onTouchEnd($event, props.baseMidiNote + v.index! + 1)"
+        @mousedown="onMouseDown($event, props.baseMidiNote + v.index! + 1)"
+        @mouseup="onMouseUp($event, props.baseMidiNote + v.index! + 1)"
+        @mouseenter="onMouseEnter($event, props.baseMidiNote + v.index! + 1)"
+        @mouseleave="onMouseLeave($event, props.baseMidiNote + v.index! + 1)"
       >
         {{ labels[v.index!] }}
       </text>
diff --git a/src/views/LatticeView.vue b/src/views/LatticeView.vue
index 9bc82323..677d1d89 100644
--- a/src/views/LatticeView.vue
+++ b/src/views/LatticeView.vue
@@ -10,6 +10,14 @@ import { useScaleStore } from '@/stores/scale'
 import { useJiLatticeStore } from '@/stores/ji-lattice'
 import { useGridStore } from '@/stores/grid'
 import { setAndReportValidity } from '@/utils'
+import { LEFT_MOUSE_BTN } from '@/constants'
+
+const props = defineProps<{
+  noteOn: NoteOnCallback
+}>()
+
+type NoteOff = () => void
+type NoteOnCallback = (index: number) => NoteOff
 
 const state = useStateStore()
 const scale = useScaleStore()
@@ -88,6 +96,68 @@ watch(etPreset, (newValue) => {
       return
   }
 })
+
+const isMousePressed = ref(false)
+const noteOffs: Map<number, NoteOff> = new Map()
+
+function start(index: number) {
+  noteOffs.set(index, props.noteOn(index))
+}
+
+function end(index: number) {
+  if (noteOffs.has(index)) {
+    noteOffs.get(index)!()
+    noteOffs.delete(index)
+  }
+}
+
+function onTouchEnd(event: TouchEvent, index: number) {
+  event.preventDefault()
+  end(index)
+}
+
+function onTouchStart(event: TouchEvent, index: number) {
+  event.preventDefault()
+  // Make sure that we start a new note.
+  end(index)
+
+  start(index)
+}
+
+function onMouseDown(event: MouseEvent, index: number) {
+  if (event.button !== LEFT_MOUSE_BTN) {
+    return
+  }
+  event.preventDefault()
+  isMousePressed.value = true
+  start(index)
+}
+
+function onMouseUp(event: MouseEvent, index: number) {
+  if (event.button !== LEFT_MOUSE_BTN) {
+    return
+  }
+  event.preventDefault()
+  isMousePressed.value = false
+  end(index)
+}
+
+function onMouseEnter(event: MouseEvent, index: number) {
+  if (!isMousePressed.value) {
+    return
+  }
+  event.preventDefault()
+  start(index)
+}
+
+function onMouseLeave(event: MouseEvent, index: number) {
+  if (!isMousePressed.value) {
+    return
+  }
+  event.preventDefault()
+  end(index)
+}
+
 </script>
 
 <template>
@@ -99,6 +169,13 @@ watch(etPreset, (newValue) => {
       :colors="scale.latticeColors"
       :relativeIntervals="scale.latticeIntervals"
       :heldNotes="heldNotes"
+      :baseMidiNote="scale.baseMidiNote"
+      :onTouchStart="onTouchStart"
+      :onTouchEnd="onTouchEnd"
+      :onMouseDown="onMouseDown"
+      :onMouseUp="onMouseUp"
+      :onMouseEnter="onMouseEnter"
+      :onMouseLeave="onMouseLeave"
     />
     <GridLattice
       v-else
@@ -106,6 +183,13 @@ watch(etPreset, (newValue) => {
       :colors="scale.latticeColors"
       :relativeIntervals="scale.latticeIntervals"
       :heldNotes="heldNotes"
+      :baseMidiNote="scale.baseMidiNote"
+      :onTouchStart="onTouchStart"
+      :onTouchEnd="onTouchEnd"
+      :onMouseDown="onMouseDown"
+      :onMouseUp="onMouseUp"
+      :onMouseEnter="onMouseEnter"
+      :onMouseLeave="onMouseLeave"
     />
     <button @click="showConfig = true">Configure</button>
     <Modal
@@ -343,6 +427,9 @@ path.arrow {
   stroke-dasharray: 1;
 }
 
+circle.node{
+  cursor: pointer;
+}
 circle.node:not(.held) {
   stroke: var(--color-text);
 }
@@ -359,5 +446,7 @@ text.node-label {
   fill: var(--color-text);
   text-anchor: middle;
   stroke: var(--color-background);
+  user-select: none;
+  cursor: pointer;
 }
 </style>