In the beginning, we will be working in the key of D Major (violins and violas!). This is because violins and violas both have a D and a G string so we can all play together.
This key has two sharps – C# and F#. When we sing notes, saying “Fsharp” and “Csharp” can be a little awkward, so we change those to “Fis” and “Cis”. They mean the same thing!
You can sing along to this video.