Expose scheduler state and don't enqueue/trigger midi keys when repl stopped

packages/core/repl.mjs

@@ -2,7 +2,13 @@ import { NeoCyclist } from './neocyclist.mjs';
 import { Cyclist } from './cyclist.mjs';
 import { evaluate as _evaluate } from './evaluate.mjs';
 import { errorLogger, logger } from './logger.mjs';
-import { setCpsFunc, setPattern as exposeSchedulerPattern, setTime, setTriggerFunc } from './schedulerState.mjs';
+import {
+  setCpsFunc,
+  setIsStarted,
+  setPattern as exposeSchedulerPattern,
+  setTime,
+  setTriggerFunc,
+} from './schedulerState.mjs';
 import { evalScope } from './evaluate.mjs';
 import { register, Pattern, isPattern, silence, stack } from './pattern.mjs';
 import { reset_state } from './impure.mjs';
@@ -52,6 +58,7 @@ export function repl({
     getTime,
     onToggle: (started) => {
       updateState({ started });
+      setIsStarted(started);
       onToggle?.(started);
       if (!started) {
         reset_state();

packages/core/schedulerState.mjs

@@ -8,6 +8,7 @@ let time;
 let cpsFunc;
 let pattern;
 let triggerFunc;
+let isStarted;
 export function getTime() {
   if (!time) {
     throw new Error('no time set! use setTime to define a time source');
@@ -42,3 +43,11 @@ export function setTriggerFunc(func) {
 export function getTriggerFunc() {
   return triggerFunc;
 }
+
+export function setIsStarted(val) {
+  isStarted = !!val;
+}
+
+export function getIsStarted() {
+  return isStarted;
+}

packages/midi/midi.mjs

@@ -10,6 +10,7 @@ import {
   Pattern,
   TimeSpan,
   getCps,
+  getIsStarted,
   getPattern,
   getTime,
   getTriggerFunc,
@@ -625,8 +626,11 @@ export async function midikeys(input) {
     const { dataBytes, message } = e;
     const noteon = message.command === 9;
     let noteoff = message.command === 8;
-    if (!noteon && !noteoff) {
-      // Ignore non-note messages (e.g. CC, pitchbend, modwheel, etc.)
+    // Don't enqueue or trigger midi notes if scheduler is not started
+    const notStarted = !getIsStarted();
+    // Ignore non-note messages (e.g. CC, pitchbend, modwheel, etc.)
+    const notANote = !noteon && !noteoff;
+    if (notStarted || notANote) {
       return;
     }
     const [note, velocity] = dataBytes;