ngOnInit(){
    this.audios = new Array<SoundBoardAudio>();
    this.audios.push(new SoundBoardAudio('Western','La canción del Sheriff.','western.mp3'));
    this.audios.push(new SoundBoardAudio('Olvidelo Amigo','Busquese otro tonto amigo.','olvidelo_amigo.mp3'));
  }

<div class="container">
      <app-soundcard *ngFor="let audio of audios" soundBoardAudio=audio></app-soundcard>
    </div>

export class SoundcardComponent implements OnInit {

  audio:any;

  constructor() {}

  @Input() soundBoardAudio;

  ngOnInit() {
    console.log(this.soundBoardAudio);
    let audioSrc = 'assets/audio/'+this.soundBoardAudio.filename;
    this.audio = new Audio(audioSrc);
  }
...

<div class="card" >
  <div class="card-block">
    <h2 class="card-title">{{soundBoardAudio.name}}</h2>
    <p>{{soundBoardAudio.desc}}
  </div>
...

<div class="container">
  <app-soundcard *ngFor="let audio of audios" [soundBoardAudio]="audio"></app-soundcard>
</div>

<div *ngFor="let pollData of PollList ; let i index" >
    <app-pollinfo [masterArray]="i"></app-pollinfo>
</div>

@Input() masterArray : any;