C2 is theoretically lower than C#2. However, the complex overtone characteristic of gongs may make such close pitches more difficult to hear. Did you mean to say C#2 / Cis 1 for gong 2?What kind of gongs are these by the way?
Bob, many thanks.To be honest I don't know about melody but I can tell you that the tuning is "to a Middle A of 442 Hz" according to my catalogue. Now that I know that C# is higher that's great info but does anyone know why the 1st tuning is called C1/C2 and what does /Cis mean?
Cis is just another name for C#, or C-sharp.