src/vs/platform/audioCues/browser/audioCueService.ts/AudioCueService/getVolumeInPercent
class AudioCueService:	private getVolumeInPercent(): number {
		const volume = this.configurationService.getValue<number>('audioCues.volume');
		if (typeof volume !== 'number') {
			return 50;
		}

		return Math.max(Math.min(volume, 100), 0);
	}