@class NSString;
@interface QSSMutableTextToSpeechSpeechFeatureOutputFeature : QSSTextToSpeechSpeechFeatureOutputFeature
@property (copy, nonatomic) NSString *phone_name;
@property (nonatomic) float begin_time;
@property (nonatomic) float end_time;
@property (nonatomic) float duration;
@property (nonatomic) float pitch;
@property (nonatomic) float energy;
- (id)init;
- (id)copyWithZone:(struct _NSZone { } *)a0;
@end