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Sounds of Music C
Posted: September 7th, 2019, 9:20 am
by terence.tan
If the frequency of the note C3 is 125 Hz, what is the frequency of A♭4?
Re: Sounds of Music C
Posted: September 8th, 2019, 9:49 am
by Giantpants
terence.tan wrote: ↑September 7th, 2019, 9:20 am
If the frequency of the note C3 is 125 Hz, what is the frequency of A♭4?
I got 397 Hz, using frequency of a note = known frequency * (1.059463...)^number of halfsteps, which was 8 from C4 (250 Hz)
Re: Sounds of Music C
Posted: September 8th, 2019, 5:24 pm
by terence.tan
Giantpants wrote: ↑September 8th, 2019, 9:49 am
terence.tan wrote: ↑September 7th, 2019, 9:20 am
If the frequency of the note C3 is 125 Hz, what is the frequency of A♭4?
I got 397 Hz, using frequency of a note = known frequency * (1.059463...)^number of halfsteps, which was 8 from C4 (250 Hz)
Yep. Thats right!. Now your turn.
Re: Sounds of Music C
Posted: September 9th, 2019, 7:32 am
by Giantpants
You’re tuning a bass guitar and for some reason have an obsession with knowing the tension of your strings. How much tension will you need to apply to your top string, G2, so that it is tuned properly if it’s 90 cm long and has a mass of 16 grams? (G2 = 98 Hz)
(Tried to make the numbers at least somewhat realistic lol)
Re: Sounds of Music C
Posted: September 21st, 2019, 5:40 pm
by UTF-8 U+6211 U+662F
Giantpants wrote: ↑September 8th, 2019, 9:49 am
terence.tan wrote: ↑September 7th, 2019, 9:20 am
If the frequency of the note C3 is 125 Hz, what is the frequency of A♭4?
I got 397 Hz, using frequency of a note = known frequency * (1.059463...)^number of halfsteps, which was 8 from C4 (250 Hz)
Interrupting for a second... doesn't this depend on your tuning system?
Giantpants wrote:
You’re tuning a bass guitar and for some reason have an obsession with knowing the tension of your strings. How much tension will you need to apply to your top string, G2, so that it is tuned properly if it’s 90 cm long and has a mass of 16 grams? (G2 = 98 Hz)
(Tried to make the numbers at least somewhat realistic lol)
550 N?
Re: Sounds of Music C
Posted: September 21st, 2019, 8:43 pm
by Giantpants
Yea, I got
553.19 N specifically, but still good. Your turn!
Re: Sounds of Music C
Posted: September 22nd, 2019, 6:40 am
by UTF-8 U+6211 U+662F
What are the five main groups in the Hornbostel-Sachs system?
Re: Sounds of Music C
Posted: October 1st, 2019, 6:46 pm
by smayya337
UTF-8 U+6211 U+662F wrote: ↑September 22nd, 2019, 6:40 am
What are the five main groups in the Hornbostel-Sachs system?
Idiophones, membranophones, aerophones, chordophones, and electrophones
Re: Sounds of Music C
Posted: October 16th, 2019, 5:46 am
by gz839918
Since smayya337 had the right answer but no posts have followed, I suppose it wouldn't hurt to start this up again.
Alice and Bob are playing a duet. Alice is supposed to play a note at 110.0 Hz and Bob is supposed to play a note at 164.8 Hz, but Bob accidentally plays his note 50 cents sharper than he is supposed to play it.
(a) What frequency does Bob actually play?
(b) If the interval between the notes is supposed to be a perfect fifth, Alice and Bob are playing most closely in what system of temperament? (A) Pythagorean (B) 12-tone equal (C) Just intonation (aka 5-prime) (D) All of these could be correct
Re: Sounds of Music C
Posted: October 16th, 2019, 11:25 am
by Giantpants
gz839918 wrote: ↑October 16th, 2019, 5:46 am
Alice and Bob are playing a duet. Alice is supposed to play a note at 110.0 Hz and Bob is supposed to play a note at 164.8 Hz, but Bob accidentally plays his note 50 cents sharper than he is supposed to play it.
(a) What frequency does Bob actually play?
(b) If the interval between the notes is supposed to be a perfect fifth, Alice and Bob are playing most closely in what system of temperament? (
A) Pythagorean (
B) 12-tone equal (
C) Just intonation (aka 5-prime) (
D) All of these could be correct
(a) 113.2 Hz
(b) I’m not so sure, but I think it might be D. all of the above, since the frequency ratio is always 3:2?