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  • Aitor Esteve commented on Aitor Esteve's instructable Baroque Alto Recorder in F9 months ago
    Baroque Alto Recorder in F

    Hello ZugpferdchenD,I did not know about Bressan recorders before you mentioned them so, no, it's not based on them.The profile is based on a technical drawing from a 18 century recorder made by "Johann Pörschmann". However, the critical dimensions (bore and holes) are not from that recorder, since it's an A415 instrument and I wanted it tuned to A440. The critical dimensions were taken from a modern yamaha recorder and tweaked a bit afterwards.And no, the recorder cannot be simply scaled down. The hole sizes, in particular, do not scale linearly. I don't know of a method to design a recorder from scratch, they are actually pretty complex. Historically I think they were designed mainly by trial and error. I think the mouthpiece might be linearly scalable, but I haven't tested ...

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    Hello ZugpferdchenD,I did not know about Bressan recorders before you mentioned them so, no, it's not based on them.The profile is based on a technical drawing from a 18 century recorder made by "Johann Pörschmann". However, the critical dimensions (bore and holes) are not from that recorder, since it's an A415 instrument and I wanted it tuned to A440. The critical dimensions were taken from a modern yamaha recorder and tweaked a bit afterwards.And no, the recorder cannot be simply scaled down. The hole sizes, in particular, do not scale linearly. I don't know of a method to design a recorder from scratch, they are actually pretty complex. Historically I think they were designed mainly by trial and error. I think the mouthpiece might be linearly scalable, but I haven't tested it. The fastest way to design a different size wold be to buy a working recorder and copy the critical dimensions from it.

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  • Aitor Esteve commented on Aitor Esteve's instructable Baroque Alto Recorder in F1 year ago
    Baroque Alto Recorder in F

    Sorry for the delay, I forgot to reply :PAbout the pictures, it's difficult to tell with the white plastic, but maybe the chamfer is not as deep as mine? If you blow the recorder with the body detached while covering the lower opening with your hand (as in the video) you should get a stable low tone. If the tone is instable or there is warble, then the chamfer is not deep enough. Refer to the second video in step 7, titled "Final test".I don't think it is the PLA shrinking, PLA shrinks less than ABS (that's the reason it warps less). And if that were the case, the recorder would just sound lower, but should sound fine. In any case, if I understand correctly, your pieces are not glued yet and they don't fit tightly, is that correct? Then maybe there are air leaks at the joints....

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    Sorry for the delay, I forgot to reply :PAbout the pictures, it's difficult to tell with the white plastic, but maybe the chamfer is not as deep as mine? If you blow the recorder with the body detached while covering the lower opening with your hand (as in the video) you should get a stable low tone. If the tone is instable or there is warble, then the chamfer is not deep enough. Refer to the second video in step 7, titled "Final test".I don't think it is the PLA shrinking, PLA shrinks less than ABS (that's the reason it warps less). And if that were the case, the recorder would just sound lower, but should sound fine. In any case, if I understand correctly, your pieces are not glued yet and they don't fit tightly, is that correct? Then maybe there are air leaks at the joints. You could try sealing the joints temporally using some kind of tape (maybe electrical tape) and see if you have more luck.

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  • Aitor Esteve commented on Aitor Esteve's instructable Baroque Alto Recorder in F1 year ago
    Baroque Alto Recorder in F

    Hello Ondřej,Well, that's a little difficult to tell, but here are some advices:1- I assume that you are familiar with recorders, right? The lowest notes are actually a bit unstable if you blow too hard, they actually overblow (they sound high). Try to blow very gently.2- Have you done the chamfer, or bevel, at the exit of the windway (the slot you blow through)? I found this to be *very* important, you can't get a stable sound in the lowest and highest register if you don't do this properly.3- The labium edge (the blade you write about). The sharper, the better.4- Be sure that the windway is clean. Some people seem to have trouble getting the printer to print cleanly the mouthpiece. If this is your case, some slicers offer the option to make the printer avoid crossing perimeters, this ...

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    Hello Ondřej,Well, that's a little difficult to tell, but here are some advices:1- I assume that you are familiar with recorders, right? The lowest notes are actually a bit unstable if you blow too hard, they actually overblow (they sound high). Try to blow very gently.2- Have you done the chamfer, or bevel, at the exit of the windway (the slot you blow through)? I found this to be *very* important, you can't get a stable sound in the lowest and highest register if you don't do this properly.3- The labium edge (the blade you write about). The sharper, the better.4- Be sure that the windway is clean. Some people seem to have trouble getting the printer to print cleanly the mouthpiece. If this is your case, some slicers offer the option to make the printer avoid crossing perimeters, this should avoid any plastics strings inside the mouthpiece.I've attached a few detailed pictures I've just taken showing you the labium edge, the mouthpiece chamfer and the (clean) windway.Cheers!

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  • Aitor Esteve commented on Aitor Esteve's instructable Baroque Alto Recorder in F3 years ago
    Baroque Alto Recorder in F

    Yes, but then you'll have to put it together using glue and polish it with sandpaper, as PLA is not soluble in acetone. It should work OK, but haven't tested it.

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