HDProDesign Car Engine Sound Fusion

Is it hard to buy or create a high quality sound system for a car used in games? The answer of this question can be found when you make a search in asset store(s). There are some sound systems but most of them depend only on changing pitch value of a single sound file. This technique is not effective to create realistic engine sounds. With this new system, sounds -recorded at different RPMs of an engine- are professionally combined with each other to create a real engine sound without fluctuation or irritating transition.
The other and compelling problem is to adapt the sound according to camera position. For example; the engine sound will be different at back, inside or hood position. HDProDesign Car Engine Sound System will handle this problem very easily. Just adjust a few parameters then it is done.
You can download a playable demo from this link.
You may also read the document before buying. Please not that sounds used in videos are not included to the project. Thanks.