Sounds of Music C

User avatar
gz839918
Member
Member
Posts: 49
Joined: April 27th, 2019, 6:40 pm
Division: Grad
State: NC

Re: Sounds of Music C

Postby gz839918 » October 15th, 2019, 12:07 pm

What about a marimba? We did a marimba last year but we used oak since it was cheap. We are thinking of doing a maple marimba this year for better resonance. We did have some trouble with registering pitches, so a percussion based instrument may not be a great move, but it is relatively easy to build and tune. I have 3 other build events and a couple test events to work on this year, so I don't want to spend a ridiculous amount of time building and tuning an instrument while I need to work on other events. Anyone else thinking about a marimba or have ideas for fixing problems with pitches getting registered?
By a marimba, do you mean that you will include pipes as specialized resonators? If so, it may be difficult to set up such an instrument, because the range of pitches in the rules this season is very wide, meaning you'll need many pipes, and they'll probably have to be very long to reach F3. (All instruments must fit in a 100 cm by 60 cm by 60 cm box when you arrive to the event, but they can be bigger when set up.) If you make a xylophone or glockenspiel (i.e. no pipes), that could produce nice pitches that are stable over time while also consuming less time than a marimba.

To be honest, I don't really know why some tuners can't pick up some instruments even when they play loudly enough. It may be due to overtones of the instrument interfering with the tuner's measurement of the fundamental. Resonator pipes, as in a marimba, might reduce interference. You could also carve off the bottom of the bars so they are shaped like arches instead of boxes to get nice integer-multiple harmonics, but this may not be best for you in terms of time since you said you want plenty of time for you other events. And of course, since I don't know why tuners fail for some instruments, this paragraph could be completely wrong.
I ❤ sounds of music! About me
Physics and biology events

UNC-Chapel Hill ’23

User avatar
Nydauron
Member
Member
Posts: 21
Joined: March 20th, 2018, 8:10 pm
Division: Grad
State: IL
Location: Cornfields...

Re: Sounds of Music C

Postby Nydauron » October 15th, 2019, 12:39 pm

In my opinion, based on this year's rules, a string instrument would be one of the more ideal instruments since you can tune each individual string right before the pitch test just by changing the tension. With wind instruments, tuning each note is super difficult. For example, if your recorder goes out of tune for some reason, you basically have to file away at the hole or apply wax to raise or lower a note. It's a lot harder to tune an individual pitch on-the-spot.
I'm definitely out of place here, but someone of my team built a violin last year. So there's an idea, I guess.
Honestly, creds to him/her for trying to build this. However, even with this year's rules where sound intensity isn't included in the score, building a violin seems too risky. When doing your pitch test, it is going to be really hard to get precise results on the pitch test. Furthermore, even if you are using a fingering chart or tapes on the fingerboard, you are relying on only your perception of the note to determine if it is within the range of cents. Take it from me; I've played the violin for 13 years so I would know plenty on all the intonation issues I've made...
Conant 19'
UIUC 23'
Member of The Builder Cult
Physics is the only real science
Change my mind

Userpage

UsernameUsername
Member
Member
Posts: 1
Joined: November 12th, 2019, 6:34 am
Division: C
State: IL

Re: Sounds of Music C

Postby UsernameUsername » November 12th, 2019, 7:37 am

I have a Xylophone as my instrument and it is quiet. I would need the microphone to be half and inch away from my instrument for it to register . Should I tell the event supervisor during the pitch test that I need the microphone right next to the instrument? I know that the rules say it can be as close as necessary, but I am wondering if I should advise the event supervisor that I need it that close.
Fox Homeschoolers
2020 events Sounds of Music, Circuit Lab, Ping Pong Parachute, Machines.

User avatar
gz839918
Member
Member
Posts: 49
Joined: April 27th, 2019, 6:40 pm
Division: Grad
State: NC

Re: Sounds of Music C

Postby gz839918 » November 12th, 2019, 5:30 pm

I have a Xylophone as my instrument and it is quiet. I would need the microphone to be half and inch away from my instrument for it to register . Should I tell the event supervisor during the pitch test that I need the microphone right next to the instrument? I know that the rules say it can be as close as necessary, but I am wondering if I should advise the event supervisor that I need it that close.
Heyo! I believe your team is planning on going to the Raymond Park Invitational, and I'll be your sounds of music event supervisor there. On invitational day, I'd be happy to move the microphone as close as you need it. To answer your question generally, what's stopping you from telling your supervisor that? You're welcome to tell your supervisors about anything you need. (That doesn't mean they have to grant your request, but in this case, the rules are specifically on your side.) For something as vital as getting your pitches to register, then ask away!

The thing I'd be worried about though is that you don't know what type of microphone your supervisor will use. For example, what if my microphone just happens to be lower quality than the microphone you used when you were testing—and as a result, it just so happens that my microphone can't pick up the xylophone, no matter how close it is? Or what if I accidentally drop the microphone, and suddenly it has trouble picking up softer sounds? It may be a safer bet just to keep working on your instrument so that you're sure it has enough intensity, because you can't always tell the specifications of the equipment at the tournament.
I ❤ sounds of music! About me
Physics and biology events

UNC-Chapel Hill ’23


Return to “Lab Events”

Who is online

Users browsing this forum: No registered users and 1 guest