How to break the habit for 7 month old baby for listening to music when drinking milk? Without music she cannot drink.

I reckon the only way to break a habit is to gradually -- in this case take away the music slowly as she feeds. For example, you can switch off the music after a few minutes and see if she responds. Gradually do this everyday, taking away a few minutes of the music each time she feeds. Alternatively, you can replace music with your singing or you chatting with baby. This is a far more convenient and easier alternative compared to having music play around her all the time. Singing or chatting to baby during nursing can also be a great form of bonding :)

To me i think is a pretty cool habit of loving music since young. It does helps in her brain development and molds her to be musically incline. You never know if one day your princess may be a musician or has a gifted talent in music :)