Confession time - when I was a senior in high school, during a private lesson with the band director, he asked me where I placed my tongue on the reed. To which, I responded, what are you talking about - I don't place my tongue on the reed! It turns out that I had spent 4 years 'ka'ing or 'guh' ing the notes and had never used my tongue. Duh - at any rate, we began to remedy this situation, and I slowly learned to use the tongue on the vicinity of the tip (as described above).
The good news is that a few years later when I was studying with Milan Turkovic, my earlier guttural use came to great use when he taught me double tonguing - Milan had me spend one month, just ka-ing (or guh-ing, or kee-ing, whatever works for you) - I spent 15 minutes each day just playing scales slowly using this. After a month of this, I added the tongue - tuh-ka, tuh-ka, (or again, da-guh or tee-kee) and practiced this way for a month. The 3rd month he had me reverse this - ka-tuh, ka-tuh (guh-da or kee-tee). Again, I did not do this for more than 15 minutes a day - making sure the double-tonguing sounded exactly like single tongue. (If not, I would slow the practice down until it did resemble the single.) After 3 months of this, I had no problems with double-tonguing.
Although initially learning to 'tongue' the wrong way, this mistake was a great help later on. Just sayin'....! Cheers, Jim
James Jeter, D.M.A., NYC Bassoonist
"To love human beings is still the only thing worth living for; without that love, you really do not live." Soren Kierkegaard
"Whatever you do will be insignificant, but it is very important that you do it." Mahatma Gandhi "Mach' es kurz! Am Juengsten Tag ist's nur ein Furz!" Goethe