I use clarinet reeds. Actually a Legere 3 1/2 plastic one at the moment. This is with an Ed Pillinger mouthpiece that is a copy of a Stowasser original. Other mouthpieces may be different.
One tárogató I've heard sounded like a kazoo, the others I usually hear sound like "normal" tárogatós, the soprano sax/clarinet like sound.
I put a "normal" reed on it, just to try it (Bb soprano clarinet), and it did work, however the facing is far too wide to fit the reed, I'll include pics in a bit, something just didn't seem "right" about the fit but it played. I'm just not used to such a wide facing.
Gheorghe--
Very soft reeds can make it difficult or impossible to play the high register. A 1.5 is already very soft and scraping it further might well put it beyond the bounds of general playability.
Of course this also depends to some extent on the facing curve of the mouthpiece, but you say that you are new to reeds, so I am thinking you might be playing with a weak embouchure and reeds that are too soft. Try a harder reed with more embouchure support and see if the highs improve. You will need to build up your embouchure muscles. Beginning clarinet players often start with a 1.5 but eventually move up to a 2.5 or 3 for good tone and control.
I've used reeds 1.5 through 3.5. (I started playing in December 2010). For the kind of music I play, you want softer reeds (Gheorghe Trambitas from Ohio goes with 1.0 sometimes).
I have no issues playing in pitch in the 2nd octave with soft reeds. Before I adjusted the bore in the upper joint, the 2nd octave was 1 step flat, no matter what reed I used or how tight the embouchure was. 3.5 was slightly better, but still way flat.
The only issue I have now is playing higher than the 2nd octave A. I'll give it a shot with stronger reeds (sometimes I use the Legere plastic ones - 2.5 I believe), but eventually I want to end up back at 1.5, playing the 2nd octave A and higher.
George
Not a question of playing in pitch, rather the fact that a very soft reed may simply close up and refuse to play in the higher end, but if you have tried harder reeds, that may not be the problem.
Another possibility is that the mpc facing is not optimal. I had lots of problems with the palm notes on my soprano sax until I found the right mouthpiece.
The upper joint absolutely needed to be adjusted. I've been through all the possibilities. Mouthpiece changes made 0 difference to the 2nd octave pitch.You adjusted the bore?? That might be the problem. Normally, if your upper octave is flat, you need to reduce the volume of your mpc, as a volume that is too large for the bore (that does not mimic the volume of the missing conic apex of the instrument) will narrow the modes, making the second register flat compared to the first. Benade describes an oboe player who ruined his oboe by adjusting the upper bore, where dimensions are very critical.
Then again maybe not, but that's a possibility.
Upper G is easy, so is G#. A is the problem.
In the discussion of reeds versus octaves, I find with a softer reed on my set up, I find the lower register to be literally impossible to work. My tárogató appreciates a 3 or a 3.5, and both registers play smoothly. I have to lip up the flatness of above, say, high F or so, other than that that has been my favorite reed. Vandoren Bb clarinet reeds.
Yes, however, as you said, after about a 5 to 10 minute warm up. Generally easier with a 2.5 or 3 reed. B seems to be the limit with a 3.5.
Both are possibilities, but unlikely. I'm pretty sure it's a matter of technique. Upper G is easy, so is G#. A is the problem.
The upper joint absolutely needed to be adjusted. I've been through all the possibilities. Mouthpiece changes made 0 difference to the 2nd octave pitch.
I did not alter the bore blindly. I did it while conforming to the 17:1 taper, as described in a separate thread. The upper joint was too narrow near the top. The instrument sat untouched in storage for 10 years, so part of the reason could have been wood shrinkage. I consulted with an expert on this, who also told me it would be unlikely the mouthpiece would make much difference in this regard.
George
I don't know what "expert" you consulted, but it is well known that for conical woodwinds, the volume of the mpc is a vital factor in determining the relationship of the registers. Martinmods, if he is reading this, can confirm what I am saying, or you can read any book on musical acoustics. Increasing the volume of the mpc will lower the upper register, whereas decreasing it will raise it in relation to the first register, and more so as you go higher.
Of course it is also possible that the bore proportions were not good; tárogatós are not exactly known to be well-refined in this regard, as are modern oboes. And even oboes are extremely variable because of the importance of even small variations in manufacture. You might well have improved the intonation; or even improved the intonation in the lower part of the second register and made the response more balky in the upper part. It is really hard to say anything definitive without really knowing more about the combination of horn, mpc, reed and player. I would, though, suggest trying your setup on another taragot and seeing if the high register is any easier. I would also suggest you check very carefully to see if the upper register hole is clear and operating properly. I read an article that said that the tárogató should be able to play two and a half octaves, and that is what I would expect from both the oboe and saxophone, which are similar acoustically.