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AnomalyConcept
Supreme tranceaddict
Registered: Jun 2005
Location: Chicagoish, USA
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Indeed 'nutsan' is correct. (great name, btw XD)
X sharp corresponds to X+1 flat, eg. A# = Bb, C# = Db.
I suspect the reason why sharps are used in the program is that it's probably easier to determine if a note is sharp (half-step up) rather than flat (half-step down) from a letter pitch.
For example, loops in programming tend to go from the min up to the max (perhaps due to it being easier to add than subtract on a computer), and so if you were scanning the spectrum, it would be more intuitive to go from low to high in terms of frequencies to find a particular note.
Hope that sort of made sense.
Disclaimer: I very much dislike Fourier series and transforms. =P
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Oct-24-2006 00:23
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AnomalyConcept
Supreme tranceaddict
Registered: Jun 2005
Location: Chicagoish, USA
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My music theory is pretty rusty, and I had to dig around for this information.
Pitches that are the same but notated differently (A# = Bb, D# = Eb, etc.) are called 'enharmonic'. (I really forgot this term...)
I'm not entirely sure why F# is used rather than Gb, apart from F# being the first sharp, and Gb being somewhere in the middle (5th or so?).
Perhaps someone with a better knowledge of music theory can shed some light on this.
(It's kind of embarassing for me to not know this, actually, especially since I still play a musical instrument.)
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Oct-24-2006 01:10
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AnomalyConcept
Supreme tranceaddict
Registered: Jun 2005
Location: Chicagoish, USA
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This is sort of off-topic but relates to RE2.
I got around to downloading and installing the latest version (2.5.something), and it's a vast improvement over the current stable, 2.3.something.
Regarding DJM-800, I suppose you could theoretically do harmonic mixes for every track- there is a function that does frequency shifting (pitch changing), so you could turn on master tempo (optional), beatmatch, then adjust to match keys. I'm sure there is a way you could calculate everything mathematically. Maybe I should look into that =P.
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Oct-24-2006 15:14
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AnomalyConcept
Supreme tranceaddict
Registered: Jun 2005
Location: Chicagoish, USA
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Hmm. I know it did that with my bpm (if there was something in the BPM field, it wouldn't actually change it when adding new tracks), but the key detection seems kind of strange.
I think the method used to determine key is to:
1. perform a FFT or similar spectrum analysis and to determine the most common frequencies (difficult due to harmonics).
2. take the quantitative data and calculate the probability of different keys (how it chooses between relative keys I'm not entirely certain)
Perhaps something is going wrong somewhere. Apart from the obvious reinstall, I'm not sure if there's anything else that would affect it.
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Oct-25-2006 18:28
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