The digastric muscle is the muscle right up under your mouth. Stick your thumb right underneath your chin and press up – this is your digastric muscle, and it can be disastrous for singing.
When we sing hard or attempt to sing high notes, we inadvertently use this muscle to try and “help” us hit those notes. In reality, the muscle actually tenses and tightens up the vocal cords, which makes it really easy to strain your voice (and thus your notes sound very strained).
The easiest and best way to get a feeling for how much freedom your voice will have once you remove the digastric muscle from the picture is to take your right thumb and press it underneath your chin. Give it some pressure, and then attempt to sing a scale. Notice how much freedom the voice has now?
It is important to practice like this regularly in order to train your voice into knowing how to sing without the digastric muscle coming into play. Once you can do this, you will open up your voice to many new platforms that you never thought possible before. You can integrate this with vocal cord compression to build stronger vocal cords while weakening the digastric muscle to give your voice some beautiful and flavorful tones.
The digastric muscle is not good for singing – practice this technique to reduce its influence on your voice and watch how your singing improves almost instantly! If you need some good exercises for this, I highly recommend checking out Singing Success. It is stocked full of exercises and downloadable material to help you get rid of that pesky digastric muscle and give your voice the freedom it deserves!