RFI: Does anyone know a free-ish way to convert an mp3 at 45rpm to 33?

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As in, like, where the original is a vinyl rip obviously.

― Gravel Puzzleworth (Gregory Henry), Tuesday, 4 January 2005 07:01 (twenty-one years ago)

I now have underground on TWO formats and I *still* cannot hear it at the better speed, grah.

― Gravel Puzzleworth (Gregory Henry), Tuesday, 4 January 2005 07:02 (twenty-one years ago)

Not that accurate, but using Audition or something similar to resample it to a .733 ratio works okay.

― Xii (Xii), Tuesday, 4 January 2005 07:21 (twenty-one years ago)

if you have a wave editor...

reduce the pitch by whatever 33/45 is in percentage points... (73.3333333%)

Or if your wave editor only takes half-steps as a parameter to slow down a sound file.. (+12 to increase the speed by two, or -12 to half the speed) use the following formula.

X = 33/45 (in your case)

if N is the amount of half steps to reduce:

N = (12 / ln(2) ) * ln(X)

(where "ln" is the natural log of a number...)

From this calculation, reduce the half steps by -5.3695077

..then reconvert to mp3 as needed when desired result is achieved.

...

MATH!

― donut christ (donut), Tuesday, 4 January 2005 07:29 (twenty-one years ago)

http://www.terra.es/personal/mmb00002/clipart/otros/martin.gif

"One day, when my parents find me a wife at the most logical age for that most holy sacrament, my wife and I will spend many nights laughing about Goedel's theorem. *snicker*"

― donut christ (donut), Tuesday, 4 January 2005 07:33 (twenty-one years ago)

going ETA are we?

― Jay-Kid (Jay-Kid), Tuesday, 4 January 2005 12:19 (twenty-one years ago)

You could load it into Kramixer and vary the pitch as much as you like.

http://www.kramware.com/download.html

― everything, Tuesday, 4 January 2005 16:43 (twenty-one years ago)

Thanks, y'all! I will play with this.

Will "varying the pitch" change the length too?

― Gravel Puzzleworth (Gregory Henry), Tuesday, 4 January 2005 17:18 (twenty-one years ago)

depends on the software.. many give you the choice. in this case, you want to change the length.

― donut christ (donut), Tuesday, 4 January 2005 17:35 (twenty-one years ago)

Or you can download Audacity and lower the rpm there, too.

― Ian Moraine (Eastern Mantra), Tuesday, 4 January 2005 20:59 (twenty-one years ago)

Use Goldwave.

― Sasha (sgh), Wednesday, 5 January 2005 02:14 (twenty-one years ago)

Audacity is amazing!

― Gravel Puzzleworth (Gregory Henry), Tuesday, 18 January 2005 14:14 (twenty-one years ago)

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