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-- Allen & Heath: Mixed In Key 3.0
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Hi,

There is more information on our Privacy Policy page:

http://www.MixedInKey.com/PrivacyPolicy.aspx


The information needed to verify the account and the melodic information about every file is uploaded online for analysis. Nobody (even the developers) can see what file names are being analyzed. That was one of the conditions to get top-name DJs to use the product. It's completely anonymous. The online connection is needed only because we use $30,000 worth of software to perform the key detection. It was the least expensive way for us to offer this technology to Mixed In Key DJs. The latest version was a free upgrade for everyone, as you already know.


The only statistic that we can see is how many files have been analyzed total. It's been approximately one month since Version 3.0 went public, and it has analyzed over 1.6 million audio files so far. My estimate is that it's about 34 terabytes (~34,000 Gb) of MP3 and WAV files.

quote:

Originally posted by nennon

thanks for the reply.. and would you know how much increase in accuracy is this version more than version 2.5?

thanks

so it compares melodic structures across an online database?


that's pretty cool actually.


that would be fascinating material for music research

quote:

Originally posted by Hasneez thanks for the reply.. and would you know how much increase in accuracy is this version more than version 2.5? thanks

It's a pretty crazy increase. I can tell you how we trained the artificial intelligence for Version 3.0:

We hired two professional musicians with near-perfect pitch, and asked them to analyze approximately 1000 songs. They keyed those songs independently, so they didn't know what answer the other person gave. In about 75% of the cases, their results matched. If they didn't, we asked both of them to rekey the songs.

At the end, we had a verified database of keys for Trance, House, Progressive, Breaks, Drum and Bass and other popular genres. We created an algorithm based on artificial intelligence that was taught to think like a human mind. So, the new version can actually correct Tim and Eli when they key new songs -- it can catch their errors before they do.

We don't have an exact answer about accuracy, but it's next-generation compared to Version 2.5 and before.

quote:

Originally posted by nefardec so it compares melodic structures across an online database? that's pretty cool actually. that would be fascinating material for music research

Just a quick note: We don't keep an online database of results. Every time you key a song, the analysis is done from scratch. That way, we don't violate the privacy of our DJs because this information is not stored in any database. We are careful about that.

quote:

Originally posted by nennon

Nice.. thanks for the reply.. I think ill get it!!

I still don�t see the point of something that isn't 100% accurate. Learn to do it yourself. Its faster and cheaper and more reliable.

quote:

Originally posted by Mr.Mystery He's advertising something that benefits him directly. What else would it be?

That's not spamming though. He's given an informative post on something new that was not mentioned here and is no doubt of interest to many posters here.

Advertising, yes. Spamming, no.

You have this habit of jumping on people for no reason at all, except to feed your hunger for abusing other posters. If this forum had more active mods, you would already be banned for intentionally setting people off and derailing perfectly good threads.

BTW am I the only one who realises that this so called 'spammer' is actually in the thread with us, discussing the 'spam' that he posted? Sounds like your typical spammer huh!

Thanks for the info nennon

quote:

Originally posted by Rememberence_ BTW am I the only one who realises that this so called 'spammer' is actually in the thread with us, discussing the 'spam' that he posted? Sounds like your typical spammer huh! Thanks for the info nennon

gee, promoting his own profit-making enterprise, what a good bloke!

I was going to write some rhetoric in response to your post, then I realised you're Tasmanian.

quote:

Originally posted by Fledz You have this habit of jumping on people for no reason at all, except to feed your hunger for abusing other posters. If this forum had more active mods, you would already be banned for intentionally setting people off and derailing perfectly good threads.

Yeah, I've somehow managed to evade the mods for six years, surely that only means I'm good at running away from them and nothing else. Please.

I never ever jump on anyone for no reason at all, and the only person who is currently trying to derail this particular thread is you. Or do you seriously think my posting habits are somehow relevant to this particular topic?

quote:

Originally posted by Rememberence_ I was going to write some rhetoric in response to your post, then I realised you're Tasmanian.

did you? how? (im not in case youre wondering). either way, im still smarter than you so feel free to stick up for some guy selling second-rate software (for the 100th time) on this website. but hey, if youre really that deaf you need a program to do your work for you, i hope you enjoy this program.

Hey guys,

Check out the poll results. I am surprised that almost 70% of DJs on TA use some form of harmonic mixing. I don't think that's typical for the DJ profession as a whole, TA is just more tech-savvy than other forums.


Since it seems appropriate, here are two tutorials that we wrote about harmonic mixing. If anyone finds them useful, please share them with your friends:


How To Organize Your CDs For Harmonic Mixing


1. Detect the key of every song in your music collection

2. Burn separate CDs for each key. For example, put all your 8A tracks on one CD. Put 9A on another CD.



3. If you burn two copies of every CD, you can mix between songs in the same key. Added benefit: If one CD gets scratched, you can play another copy.

4. Print a CD label with the following information:

• Keycode on top (#08 means 8A in this case)
  
• Date the CD was made
  
• Full track names
  

• Burn separate CDs for each key
  
  
• Make two copies of every CD
  
  
• Sort your CD wallet from low to high numbers
  

Here is a second tutorial that helps if you use vinyl, Ableton Live's "Repitch" mode, or CD-Js *without* master tempo:


How does changing the tempo change the key?

If you use DJ equipment without a "Master Tempo" function, changing the tempo of the song will change its key as well. Even the smallest tempo change will alter the key, but a 6% difference will change the key to a whole new one.


6% Rule

6% is the magic percentage: it will move your song to the adjacent key on the piano, as illustrated below:



If your original song was recorded in F Minor, increasing the tempo by 6% will move the song one key to the right to give you G-Flat Minor.

This is equivalent to adding 7 numbers to your current Camelot keycode. Since F Minor is also known as 4A, adding 7 will give you 11A. The piano roll above shows you that 11A is indeed equivalent to Gbm.


Decreasing the tempo by 6% has the reverse effect: It moves your song one key to the left, or the equivalent to subtracting 7 from your current Camelot keycode. This is illustrated below:





3% Rule


There is a basic rule for small increments: If you change the tempo by less than 3%, keep your original key. If you change the tempo by 3% or more, use the 6% key.


3% is the middle point. Anything below 3% will be closer to your original key (F Minor) and anything above 3% will be closer to your 6% key -- Gb minor or E minor, depending whether you increase or decrease the tempo.


Examples

• Two songs in F Minor that have roughly the same BPMs: 130 and 131. We can mix them together because the tempo difference is less than 3%.
  
  
• Two songs in A Minor with different tempos. First song is 128 BPM and the second is 136 BPM. To beatmatch the slower song with the faster song, we�ll have to increase its tempo by exactly 6.25%. This will move the slower song one key to the right, making it B-flat Minor rather than A Minor. The new keys will no longer result in a harmonic mix because A Minor (8A) and B-Flat Minor (3A) are not compatible Camelot keycodes.
  

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