Quick ? about vinyl

[zosomagik]

Does anybody know how many semitones higher a 33 will be if you play it on a 45 speed? My turntable is busted, or else I would try it. I'm not really going to use this for anything, just curious and google didn't furnish any answers.

[wub]

About 350

[zosomagik]

Damn son

[wub]

More than you can afford, pal.

[zosomagik]

Well, thanks anyway for the obviously, completely accurate information man

Was kind of a stupid question I guess, curiosity just overwhelms one sometimes

[wub]

Okay, serious answer;

A pitch change of ~3% would be a semitone shift either way. So 33 to 45 is an increase of 36%, so ~9 semitones.

[scherou]

i was curious too so i tested this out, played a side of one of my records on 33 then 45 and listened for the synths... it's a difference of a perfect fourth aka C to F, F to Bb etc. aka 5 semitones difference, approximately. Dunno where 9 could've come from haha

[baddis98]

i don't really know anything about music theory, so sorry if i'm thinking of it the wrong way: from my understanding the speed of the record affects the frequency of the note. and since the difference in frequency between two notes differ from case to case, the key change should depend on the original note (= is not always the same). am i talking bullshit?

[zosomagik]

i don't really know anything about music theory, so sorry if i'm thinking of it the wrong way: from my understanding the speed of the record affects the frequency of the note. and since the difference in frequency between two notes differ from case to case, the key change should depend on the original note (= is not always the same). am i talking bullshit?

I don't really think that would matter, I'm pretty sure it would translate the same from a record with a song in E flat major as it would one in C major etc.

[magnetron_sputtering]

Well double the frequency is an octave higher. You're increasing the frequency by (45/33)x100=36% (approx.), so that's just over a third of an octave higher or a bit more than four semitones. To get to five semitones you'd need to go to about 33+(5/12)*33=46.75rpm.

[wub]

It would appear my maths is slightly off.

[scherou]

Well double the frequency is an octave higher. You're increasing the frequency by (45/33)x100=36% (approx.), so that's just over a third of an octave higher or a bit more than four semitones. To get to five semitones you'd need to go to about 33+(5/12)*33=46.75rpm.

i did say approximately haha i was doing it by ear

[firstboyonthemoon]

Well double the frequency is an octave higher. You're increasing the frequency by (45/33)x100=36% (approx.), so that's just over a third of an octave higher or a bit more than four semitones. To get to five semitones you'd need to go to about 33+(5/12)*33=46.75rpm.

That's not quite how it works though. A just perfect fourth has a ratio of 4:3 to its fundamental or to put it another way, 33.3% higher. (A 12-tet perfect fourth is a couple cents different, but we're close enough for jazz here.) So a 33 1/3 record played at 45 rpm is going to be a little more than a perfect fourth higher than the original recording.

Also, this has come up before: http://www.dubstepforum.com/forum/viewt ... 3#p2090652

[magnetron_sputtering]

Well double the frequency is an octave higher. You're increasing the frequency by (45/33)x100=36% (approx.), so that's just over a third of an octave higher or a bit more than four semitones. To get to five semitones you'd need to go to about 33+(5/12)*33=46.75rpm.

That's not quite how it works though. A just perfect fourth has a ratio of 4:3 to its fundamental or to put it another way, 33.3% higher. (A 12-tet perfect fourth is a couple cents different, but we're close enough for jazz here.) So a 33 1/3 record played at 45 rpm is going to be a little more than a perfect fourth higher than the original recording.

Also, this has come up before: http://www.dubstepforum.com/forum/viewt ... 3#p2090652

That's what I said.

[scherou]

Well double the frequency is an octave higher. You're increasing the frequency by (45/33)x100=36% (approx.), so that's just over a third of an octave higher or a bit more than four semitones. To get to five semitones you'd need to go to about 33+(5/12)*33=46.75rpm.

That's not quite how it works though. A just perfect fourth has a ratio of 4:3 to its fundamental or to put it another way, 33.3% higher. (A 12-tet perfect fourth is a couple cents different, but we're close enough for jazz here.) So a 33 1/3 record played at 45 rpm is going to be a little more than a perfect fourth higher than the original recording.

Also, this has come up before: http://www.dubstepforum.com/forum/viewt ... 3#p2090652

That's what I said.

no you didn't, you said it'd be ~4 semitones higher, a perfect fourth is 5 semitones.

[magnetron_sputtering]

Well double the frequency is an octave higher. You're increasing the frequency by (45/33)x100=36% (approx.), so that's just over a third of an octave higher or a bit more than four semitones. To get to five semitones you'd need to go to about 33+(5/12)*33=46.75rpm.

That's not quite how it works though. A just perfect fourth has a ratio of 4:3 to its fundamental or to put it another way, 33.3% higher. (A 12-tet perfect fourth is a couple cents different, but we're close enough for jazz here.) So a 33 1/3 record played at 45 rpm is going to be a little more than a perfect fourth higher than the original recording.

Also, this has come up before: http://www.dubstepforum.com/forum/viewt ... 3#p2090652

That's what I said.

no you didn't, you said it'd be ~4 semitones higher, a perfect fourth is 5 semitones.

You're right. I came back to edit my post but I'll leave it. It's not as simple as I thought. I assumed a perfect fourth was four semitones but it's not for some reason. I'll be on wikipedia if anyone needs me.

[scherou]

Well double the frequency is an octave higher. You're increasing the frequency by (45/33)x100=36% (approx.), so that's just over a third of an octave higher or a bit more than four semitones. To get to five semitones you'd need to go to about 33+(5/12)*33=46.75rpm.

That's not quite how it works though. A just perfect fourth has a ratio of 4:3 to its fundamental or to put it another way, 33.3% higher. (A 12-tet perfect fourth is a couple cents different, but we're close enough for jazz here.) So a 33 1/3 record played at 45 rpm is going to be a little more than a perfect fourth higher than the original recording.

Also, this has come up before: http://www.dubstepforum.com/forum/viewt ... 3#p2090652

That's what I said.

no you didn't, you said it'd be ~4 semitones higher, a perfect fourth is 5 semitones.

You're right. I came back to edit my post but I'll leave it. It's not as simple as I thought. I assumed a perfect fourth was four semitones but it's not for some reason. I'll be on wikipedia if anyone needs me.

haha well its just because a perfect 'fourth' refers to the melodic interval in the context of a major/minor scale, as in up 4 notes of the scale, not 4 semitones