If you are a beginner to music or past a particular age limit, playing a music instrument is ideal over singing to render songs retaining its beauty, with its correct tempo, feel and punch. (Specially recommended if there are any health issues).
* The main eason is, instead of you learn something new, you act as a teacher to train a gadget to play music the way you want it to serve you.
*. Once you get oriented to an instrument, unlike singing, you make it play your favourite songs spontaneously, tunes revived from your inner memory. (This is different from singing, where you will have to hunt for words if you don't get them. In an instrument, you may find the background music also comes through easily.
*. Since the istrument is not you yourself and which is under your control, it will be only fun and interesting to cosider it as your interactive companion.
*. Many songs are designed exclusively to be sung by male or female and will not sound good if sung otherwise. This can be compromised to a great extend if played and heard through an instrument.
*. Duets go very well with instruments. The combinations could be playing at different pitch on the same instrument or you take one part by singing and instrument to play to play the other.
*. Singing in high pitch or attempting certain aalaapanaas may sound awkward or are almost impossible if there are health issues. None of these problems arise while played through an instrument.
* Your music time will go unattended or without disturbing others if you learn, practice and play in silence. (This is possible with Keyboard and few other instruments).
*. Lack of confidence, shyness etc. leads to reluctance in singing but this is minimal on playing an instrument (since you are using it as a tool).
* It wil be possible to record the songs you play separately even while singing along. This will help you to assess your performance better.
There are few psychological points also to favour learning musical instruments.
*. An instrument is as good as an interactive companion. So it will be an ideal company in solitude or to create an ambiance to energise you when tired or depressed.
*. Every time you play a favourite song in an instrument, your subconcious mind is evoked resulting in evoking your internal memories to bring back many things you considered forgotten. This may help to re - invent you to energise and to bring down your mental age to a great extend.