Hi , how can i tune the oscillator in hz instead of semitones ?
thanx!
how to tune the oscillators in hz ?
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giorgiomartini giorgiomartini https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=161733
- KVRist
- 335 posts since 1 Oct, 2007 from Berlin
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- u-he
- 30216 posts since 8 Aug, 2002 from Berlin
Hmmm, you can't. Like 99.9% of synthesizers, it's done in semitones.
That is because the tuning is relative to the key you play. The key is naturally set in midinotes which equals semitones. It only makes sense that any coarse detune from there is done in semitones as well, because otherwise the synthesizer would end up out of tune.
Example:
If you tune an oscillator by +100Hz and you play an A at 440Hz, you'd get 540Hz, which would be a few semitones above the A. Now, if you play the A one octave higher, you'd end up with 880Hz + 100Hz = 980Hz. Which would be 100Hz less than an actual octave higher because 540Hz x 2 = 1080Hz.
So, if oscillators could be tuned in Hz relative to the note, they'd sound totally screwed.
If you want to know the frequency of a note, there are numerous websites with tables for that, e.g. this one
That is because the tuning is relative to the key you play. The key is naturally set in midinotes which equals semitones. It only makes sense that any coarse detune from there is done in semitones as well, because otherwise the synthesizer would end up out of tune.
Example:
If you tune an oscillator by +100Hz and you play an A at 440Hz, you'd get 540Hz, which would be a few semitones above the A. Now, if you play the A one octave higher, you'd end up with 880Hz + 100Hz = 980Hz. Which would be 100Hz less than an actual octave higher because 540Hz x 2 = 1080Hz.
So, if oscillators could be tuned in Hz relative to the note, they'd sound totally screwed.
If you want to know the frequency of a note, there are numerous websites with tables for that, e.g. this one
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giorgiomartini giorgiomartini https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=161733
- KVRist
- Topic Starter
- 335 posts since 1 Oct, 2007 from Berlin
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giorgiomartini giorgiomartini https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=161733
- KVRist
- Topic Starter
- 335 posts since 1 Oct, 2007 from Berlin
by the way woulnt this be usefull for tuning fm ?
im learning piano and musical theory in prenzelberg, and my teacher told my about the natural scale.
and how it needs to be used in hz , could this be implemented ?
or is it enough with this list?
im learning piano and musical theory in prenzelberg, and my teacher told my about the natural scale.
and how it needs to be used in hz , could this be implemented ?
or is it enough with this list?
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- u-he
- 30216 posts since 8 Aug, 2002 from Berlin
Well, for FM you basically just need a list of clean intervals, as specified in the other thread. The first 16 clean harmonics are quite sufficient - they cover 4 octaves, and after that it gets either nasty or doesn't expose much of a difference.
Code: Select all
ratio semitone interval
1 0 same note
2 12 1 octave
3 19.02 1 octave + perfect 5th
4 24.00 2 octaves
5 27.86 2 octaves + major 3rd
6 31.02 2 octaves + perfect 5th
7 33.69 2 octaves + minor 7th
8 36.00 3 octaves
9 38.04 3 octaves + major 2nd
10 39.86 3 octaves + major 3rd
11 41.51 3 octaves + augmented 4th
12 43.02 3 octaves + perfect 5th
13 44.41 3 octaves + minor 6th
14 45.69 3 octaves + minor 7th
15 46.88 3 octaves + major 7th
16 48.00 4 octaves
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giorgiomartini giorgiomartini https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=161733
- KVRist
- Topic Starter
- 335 posts since 1 Oct, 2007 from Berlin
Urs wrote:Well, for FM you basically just need a list of clean intervals, as specified in the other thread. The first 16 clean harmonics are quite sufficient - they cover 4 octaves, and after that it gets either nasty or doesn't expose much of a difference.
Code: Select all
ratio semitone interval 1 0 same note 2 12 1 octave 3 19.02 1 octave + perfect 5th 4 24.00 2 octaves 5 27.86 2 octaves + major 3rd 6 31.02 2 octaves + perfect 5th 7 33.69 2 octaves + minor 7th 8 36.00 3 octaves 9 38.04 3 octaves + major 2nd 10 39.86 3 octaves + major 3rd 11 41.51 3 octaves + augmented 4th 12 43.02 3 octaves + perfect 5th 13 44.41 3 octaves + minor 6th 14 45.69 3 octaves + minor 7th 15 46.88 3 octaves + major 7th 16 48.00 4 octaves
great now i got it
1 questions:
- if i want another modulator one octave lower in a perfect 5th , should i tune it to -19.02 ?
thanx !
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- u-he
- 30216 posts since 8 Aug, 2002 from Berlin
Hehe, it's 7.02 - a perfect fifth, but an octave lower. This is however not a harmonic, but it's still good for interesting sounds.giorgiomartini wrote: - if i want another modulator one octave lower in a perfect 5th , should i tune it to -19.02 ?