Well that teaching is wrong. Remember the church is the bride of Christ not buildings with seats and a pulpit and a minster.It is a RAMPANT teaching within many mainline churches and I mean from very well known pastors that teach something like that view.
It might not be EXACLT that view but they will say something like
"You'll be so overwhelmed with Joy seeing Jesus that you won't even WANT to do anything but sing to Him"
they extend the praising in Revelation, particularly Revelation 4, 5, 7, and 15 into eternity.
It's easy to believe what they teach because they ARE getting the idea from Revelation 4, 5, 7, and 15 and from some of the Psalms.
I'm constantly confronted with that view and it does have enough biblical evidence from those passages and psalms that I start believing it, and I get overwhelmingly depressed about it, that God would change His mind and His plan from man being created to dress and keep God's creation, and minister to it, as His agents bearing His image... to a choir.
To complicate things for me, I absolutely do not like singing, not in church, I don't like to sing in the shower, I don't like to sing songs that I enjoy, I don't like to sing my friends happy birthday, even as a kid. Every time I've ever opened my mouth to even TRY singing, I've instantly regretted it. My voice carries too well and is too strong and so I really have to dial it down, and it also when I sing in particular it creates a really uncomfortable vibration through my chest.
so when it comes down to it, that teaching of "heaven" is basically telling me that I will do something I hate doing 24/7... or be tortured forever, no alternatives, and then I'm "comforted" with what essentially is God brainwashing me to enjoy something I hate doing. Which feels more like a rejection by my own creator that he replaces me with another person because I was so rejected that I shouldn't even exist.
When I start believing that teaching
I don't want to exist.
People are not God, they make mistakes or they may even be wolves in sheeps clothing knowing exactly what they are doing.
As to your voice this is your corrupted mortal body that feels and acts this way not your incorruptible resurrected body. What we view or hear as beauty now is probably like a muddy lake compared to how it will be.
Paul, a great man of God despaired over things that he did.
21 So I find this law at work: Although I want to do good, evil is right there with me. 22 For in my inner being I delight in God’s law; 23 but I see another law at work in me, waging war against the law of my mind and making me a prisoner of the law of sin at work within me. 24 What a wretched man I am! Who will rescue me from this body that is subject to death? 25 Thanks be to God, who delivers me through Jesus Christ our Lord!
Now this was about sin that he committed but you can say you despair over your voice, well God will deliver you from that too.