Could anyone tell me what are the bottom holes for in a 8 holed keyless flute?
thanks
On a keyed 8 key flute, the 2 bottom holes are for the C and C# keys. If you’re playing a standard keyless D flute like I am, it’s just probably there for aesthetic & balance purposes. I don’t use it because my pinkies can’t reach 
The holes are where C & C# keys would be. They’re the only keys normally in an open position. On a long D foot flute they’re for venting. Remember that the pitch of the note is generally determined by the length of the flute from the embouchure to the first open hole, so by closing the D hole (RH3), you’re extending the tube down to that first vent hole.
Kevin Krell
There’s some debate among flute makers about whether a long footjoint with those two bottom holes is necessary on a keyless or 6-key flute. Some makers claim that those holes and the length of the footjoint have an affect the overall sound, and that when a short foot is used something is lost. Others don’t hear a difference and prefer using a short foot because it lets the bottom note sing out more loudly.
With metal flutes (Boehm system) such as my open hole Haynes there is also a B foot available that has an extra hole beyond the two for C# and C. This extra length helps with intonation of the top octave notes, and really does make a difference for me. Presumably this theory could work on wood flutes as well, a longer foot joint may give easier/better top octave intonation.
Thank you all.
Then i shall assume that those unrecachable holes in my seery should be a sort of arcaic tail,or an invitation to add a few more keys or a few more fingers
Wooden flutes were made that went all the way down to low A (5 keys!). The mechanism is something to behold. I think this was more common in Austrian-made flutes.
Conversely, some Boehm flute makers also offer short (D) feet, for people who play mostly Baroque music. Apparently they help making the flute more agile.
My Boehm flute has a C foot, and Eldred Spell made me a little silver slug that fits in there and gives me a low B instead of the low C, when i need it.
Actually as a party trick you can get a friend to stand behind you and to your right when you’re playing a tune that goes down to C, and they can close the holes for you at the appropriate time with their fingers. It’s quite entertaining. Hey, if concert pianists can have the luxury of a page turner, why shouldn’t flute players be able to have a hole-closer?
Gee, Brad, where did you learn all these tricks? It’s like playing Out on the Ocean with fingers up one hole, or playing the whistle in a bottle full of water… Freak!! 
I know, I know, I’m a sucker for tricks like that. It’s not enough for me to play an instrument, I also seem to have to play with it.
HAHAHA!!! That’s mighty funny. Maybe concert flautists did have hole-closers (what a name!) until the hole-closers decided that their job was more than disgusting and not very hygenic at all 
People working as hole-closers??
I am glad that we were only talking about flutes
sorry,only was a spanish joke 