),this.input=this._gainNode,this.output=this._gainNode,this.gain=new no({context:this.context,convert:t.convert,param:this._gainNode.gain,units:t.units,value:t.gain,minValue:t.minValue,maxValue:t.maxValue}),Di(this,"gain")}static getDefaults(){return Object.assign(io.getDefaults(),{convert:!0,gain:1,units:"gain"})}dispose(){return super.dispose(),this._gainNode.disconnect(),this.gain.dispose(),this}}class lo extends io{constructor(t){super(t),this.onended=Ei,this._startTime=-1,this._stopTime=-1,this._timeout=-1,this.output=new ho({context:this.context,gain:0}),this._gainNode=this.output,this.getStateAtTime=function(t){const e=this.toSeconds(t);return-1!==this._startTime&&e>=this._startTime&&(-1===this._stopTime||e<=this._stopTime)?"started":"stopped"},this._fadeIn=t.fadeIn,this._fadeOut=t.fadeOut,this._curve=t.curve,this.onended=t.onended}static getDefaults(){return Object.assign(io.getDefaults(),{curve:"linear",fadeIn:0,fadeOut:0,onended:Ei})}_startGain(t,e=1){Bn(-1===this._startTime,"Source cannot be started more than once");const s=this.toSeconds(this._fadeIn);return this._startTime=t+s,this._startTime=Math.max(this._startTime,this.context.currentTime),s>0?(this._gainNode.gain.setValueAtTime(0,t),"linear"===this._curve?this._gainNode.gain.linearRampToValueAtTime(e,t+s):this._gainNode.gain.exponentialApproachValueAtTime(e,t,s)):this._gainNode.gain.setValueAtTime(e,t),this}stop(t){return this.log("stop",t),this._stopGain(this.toSeconds(t)),this}_stopGain(t){Bn(-1!==this._startTime,"'start' must be called before 'stop'"),this.cancelStop();const e=this.toSeconds(this._fadeOut);return this._stopTime=this.toSeconds(t)+e,this._stopTime=Math.max(this._stopTime,this.now()),e>0?"linear"===this._curve?this._gainNode.gain.linearRampTo(0,e,t):this._gainNode.gain.targetRampTo(0,e,t):(this._gainNode.gain.cancelAndHoldAtTime(t),this._gainNode.gain.setValueAtTime(0,t)),this.context.clearTimeout(this._timeout),this._timeout=this.context.setTimeout((()=>{const t="exponential"===this._curve?2*e:0;this._stopSource(this.now()+t),this._onended()}),this._stopTime-this.context.currentTime),this}_onended(){if(this.onended!==Ei&&(this.onended(this),this.onended=Ei,!this.context.isOffline)){const t=()=>this.dispose();"undefined"!=typeof requestIdleCallback?requestIdleCallback(t):setTimeout(t,10)}}get state(){return this.getStateAtTime(this.now())}cancelStop(){return this.log("cancelStop"),Bn(-1!==this._startTime,"Source is not started"),this._gainNode.gain.cancelScheduledValues(this._startTime+this.sampleTime),this.context.clearTimeout(this._timeout),this._stopTime=-1,this}dispose(){return super.dispose(),this._gainNode.dispose(),this.onended=Ei,this}}class uo extends lo{constructor(){const t=ui(uo.getDefaults(),arguments,["offset"]);super(t),this.name="ToneConstantSource",this._source=this.context.createConstantSource(),ro(this._source,this._gainNode),this.offset=new no({context:this.context,convert:t.convert,param:this._source.offset,units:t.units,value:t.offset,minValue:t.minValue,maxValue:t.maxValue})}static getDefaults(){return Object.assign(lo.getDefaults(),{convert:!0,offset:1,units:"number"})}start(t){const e=this.toSeconds(t);return this.log("start",e),this._startGain(e),this._source.start(e),this}_stopSource(t){this._source.stop(t)}dispose(){return super.dispose(),"started"===this.state&&this.stop(),this._source.disconnect(),this.offset.dispose(),this}}class po extends io{constructor(){const t=ui(po.getDefaults(),arguments,["value","units"]);super(t),this.name="Signal",this.override=!0,this.output=this._constantSource=new uo({context:this.context,convert:t.convert,offset:t.value,units:t.units,minValue:t.minValue,maxValue:t.maxValue}),this._constantSource.start(0),this.input=this._param=this._constantSource.offset}static getDefaults(){return Object.assign(io.getDefaults(),{convert:!0,units:"number",value:0})}connect(t,e=0,s=0){return fo(this,t,e,s),this}dispose(){return super.dispose(),this._param.dispose(),this._constantSource.dispose(),this}setValueAtTime(t,e){return this._param.setValueAtTime(t,e),this}getValueAtTime(t){return this._param.getValueAtTime(t)}setRampPoint(t){return this._param.setRampPoint(t),this}linearRampToValueAtTime(t,e){return this._param.linearRampToValueAtTime(t,e),this}exponentialRampToValueAtTime(t,e){return this._param.exponentialRampToValueAtTime(t,e),this}exponentialRampTo(t,e,s){return this._param.exponentialRampTo(t,e,s),this}linearRampTo(t,e,s){return this._param.linearRampTo(t,e,s),this}targetRampTo(t,e,s){return this._param.targetRampTo(t,e,s),this}exponentialApproachValueAtTime(t,e,s){return this._param.exponentialApproachValueAtTime(t,e,s),this}setTargetAtTime(t,e,s){return this._param.setTargetAtTime(t,e,s),this}setValueCurveAtTime(t,e,s,n){return this._param.setValueCurveAtTime(t,e,s,n),this}cancelScheduledValues(t){return this._param.cancelScheduledValues(t),this}cancelAndHoldAtTime(t){return this._param.cancelAndHoldAtTime(t),this}rampTo(t,e,s){return this._