dev@133: <button md-icon-button (click)="emitToggleRecording()">
dev@133:   <md-icon>
dev@236:     <ng-template [ngIf]="recordingStatus == 'enabled'">mic_none</ng-template>
dev@236:     <ng-template [ngIf]="recordingStatus == 'disabled'">mic_off</ng-template>
dev@236:     <ng-template [ngIf]="recordingStatus == 'recording'">mic_on</ng-template>
dev@133:   </md-icon>
dev@133: </button>
dev@133: