$mol_audio_instrument error status, fail safe, idempotency fix in act…

…ive api

audio/instrument/instrument.ts

@@ -66,22 +66,24 @@ namespace $ {
 
 		@ $mol_mem
 		override active(next?: boolean) {
+			this.node()
+			const start_at = this.start_at()
+			this.stop_at()
+
 			if (next) {
 				this.context().active(true)
 				this.start_at(0)
 				this.stop_at(-1)
+				return true
 			}
 
 			if (next === false) {
 				this.start_at(-1)
 				this.stop_at(0)
+				return false
 			}
 
-			this.node()
-			this.start_at()
-			this.stop_at()
-
-			return this.start_at() !== -1
+			return start_at !== -1
 		}
 
 		@ $mol_action

audio/room/room.ts

@@ -1,6 +1,6 @@
 namespace $ {
 
-	export type $mol_audio_room_status = AudioContextState | 'playing'
+	export type $mol_audio_room_status = AudioContextState | 'playing' | 'error'
 
 	/**
 	 * @see https://mol.hyoo.ru/#!section=demos/demo=mol_audio_demo
@@ -34,13 +34,27 @@ namespace $ {
 			return new this.$.$mol_after_timeout(time * 1000, () => $mol_wire_async(this).active(false))
 		}
 
+		@ $mol_mem
+		error() {
+			try {
+				this.output()
+			} catch (e) {
+				if (! $mol_promise_like(e)) return { value: e as Error }
+			}
+
+			return null
+		}
 
 		@ $mol_mem
 		status(next?: $mol_audio_room_status | null): $mol_audio_room_status {
-			const state = this.context().state(next === 'playing' ? 'running' : next)
+			if (next === 'playing') next = 'running'
+			if (next === 'error') next = 'closed'
+
+			const state = this.context().state(next)
+
 			if (state === 'closed') return state
 
-			this.output()
+			if ( this.error() ) return 'error'
 
 			if (this.inputs_active() && state === 'running') return 'playing'
 

audio/sample/sample.ts

@@ -56,15 +56,15 @@ namespace $ {
 
 		@ $mol_mem
 		override active(next?: boolean) {
-
+			const prev = super.active(next)
 			if (this.node_started()) {
 				if (next) this.context().active(true)
 				this.rate(next ? null : 0)
 
 				return next ?? false
 			}
 
-			return super.active(next)
+			return prev
 		}
 
 		@ $mol_mem