Julie, I agree with Dusty on the transposing if you want to have a hard copy to share with other players. He is right about the accidentals (hiccups); but they can be remedied. Good luck with your efforts. I'm sure you will do just fine.
How are you playing the song? If you have the music and tab in D for DAd or DAA tuning, as Jan says you can just tune to CGc or CGG and use the same tab. You will be playing in C. No new music needed.
If you actually want to transpose the music itself, that it not hard either. Every note and every chord will just be one whole step lower in C. So when you see a D, it should be a C; when you see an E, it should be a D; when you see a G, it should be an F; and so forth. That will work for chords and notes.
I do want to warn you that there may be a couple of accidentals in the melody, meaning notes that are not part of the diatonic scale. If you are just singing, you can strum chords and be OK. But if you want to play the melody on your dulcimer, you may have some obstacles to overcome.
Julie, If you have the sheet music in D, then download Musescore (if you don't need dulcimer tab) or Musedit (if you do need dulcimer tab) and use its transpose feature to take it down to C. I use both and they are great, free programs. Let me know if you need more info.
Thank you Jan! I should have made my post more clear...... I can play the chords in key of C. But the reason I'm looking for actual sheet music is that I play in a group and a few of the others who play melody need the standard music notation (fiddle, banjo, tenor guitar players). Thanks so much!
Retune to CGc and play it as you would in the DAd.
Do you have a 1.5 fret? If so, you can easily play the C, F, and G chords without having to move your hand all over the fretboard.
Looking for this tune in standard musical notation in key of C. I already have it in tab format in key of D with chords and music notation...... and can find it online in key of G. But hoping to find the key I like to sing it in... key of C ... anyone got leads? Thanks