Digital Key Control
The digital key control is a very nice feature found on most karaoke players. It allows the key of the music to be adjusted up or down by small increments (steps) without affecting the tempo of the song. While making extreme adjustments can degrade the audio quality, the change is usually not noticeable.
It's surprising that so few karaoke singers utilize the digital key control even when they know that it exists. They will strain to sing songs that were recorded in a key that is to high for their voice or pass up songs that they would like to sing because of the key it's in.
Whenever I notice that the key control may be beneficial to one of my singers I will mention it to them. At times I have actually changed the key without the singer knowing it just to help them sound better.
So the next time you are out singing karaoke don't hesitate to ask the KJ "would you drop the key of my next song a step or two?".