I would agree since the accelerometer will only give you momentary changes and cause a constant seasaw effect on the out put, where as a tilt sensor will hold the variable as to the attitude more like a Theremin.
A good simple tilt sensor is a mems type accelerometer such as the MMA7660. This acts more like a tilt sensor with about 30 steps per 90 degree tilt rotation among 3 axises.
As an amateur musician, I appreciate what you're trying to do. However, as a professional mathematician, I would urge you to give up the accelerometer and look for a simple tilt sensor.
An accelerometer measures acceleration, and the tilt you really want to measure must be derived from that output by some fairly complex math. Even if you master the math, accelerometers have a "creep" error which requires a calibration/reset at intervals.
A tilt sensor will just directly use the gravitational field to give you a tilt angle, directly, and without lots of complex math. I haven't researched any of them, but that's where I would look.
Good Luck, sounds like a neat project.
Thank both of You for the answers, I've checked after these tilt sensor things but according to the interwebs, these are somekind of accelerometers, so i think that anything they can do, the MPU could do.
The MPU 6050 looks like a very smart device, since it has 3 axis accelero, and gyroscope, and also an integrated DMP whick should be fairly enough i think to do the complex math involved, and act like a tilt sensor.
I would like to stick to this unit, because I already have it, and i would like to do some more motion sensing stuff, like shake detection, and some control command sending when i rotate the horn back and forth like a steering wheel.
I think somebody who has some experience with the MPU6050 could help me, but i will consider buying a tilt sensor.
Thanks for the help anyway!