Hello,
i want to amplify music at certain tones which is the filter to use for that?
Effects > Equalization.
The blue-green line in the middle is a rubber band and you can push up or down to increase or decrease different frequencies. For example, the illustration is the “telephone” filter which decreases frequencies below 300 and above 3000. It leaves everything between those two alone.
You can also do it with sliders by switching to Graphic Eq.
Curves gives you better control.
Koz
hello, thankyou i have found it, but i want to boost only very specific frequencys it should be on the hz precise this is not possible with the equalizer
Since that’s very difficult – almost impossible, this is where we get to find out what your job is. What are you doing?
Koz
I am improving music to affect the human body and mind.
right now i research into this:
http://solawakening.com/frequencies-water/
i want to boost the frequencys in normal music without this is heard consciously while still have atleast a bit of the harmonizing effect of the sound
I’m at work, so I can’t watch the video… I’m not buying any of it, but I’ll try to help with the audio stuff anyway…
Do you know what frequencies you want to affect?
i want to boost the frequencys in normal music without this is heard consciously while still have at least a bit of the harmonizing effect of the sound
So, you don’t want to hear it?
An equalizer is probably the best tool for making small, subtle, changes that you are unlikely to hear or notice. Just make changes of 1dB or less. You might hear a 1dB change, but you’ll never hear a 0.1dB change, and it’s very unlikely that you’ll hear or notice a 1dB change if play-back the file tomorrow (without A/B comparing).
There is another thing you might want to try. You can generate tones by selecting “Generate” from the main menu. If you mix these tones at low-levels (say, at -40dB or less) with existing music, the music will mask (drown-out) the tones so that you can’t hear them.
If you want to affect (or resonate) a single-pure frequency, this is better than using a filter or equalizer. Or, if you have an object that resonates (like a guitar string, or a pipe that’s open at one or both ends) you can excite the resonance with noise or an impulse (or music) and it will tend to “ring” at it’s natural resonant frequency.
Or, you can generate white or pink noise and mix the pure tones with the noise. Some people find white or pink noise can be “soothing”. (I think it’s mostly annoying unless it’s drowning-out a more-annoying sound.)
I am improving music to affect the human body and mind.
Of course, the whole point of music is for it to be enjoyable. Different people have different tastes, but basically every artist & producer is already doing that.
Do you know what frequencies you want to affect?
I have researched a bit and i found that i want to boost the multipliers of a special frequency (as there are certain resonances in the body on this frequencies).
Lets say as example the base frequency is 4 then i want to boost 4, 8, 12,16 and so on how can i do this with an equalizer?
I experimented to change the pitch and i feel it did excellent (however i must admit i don’t understand how the number of the pitch in audacity is generated and what i change at all)
There is another thing you might want to try. You can generate tones by selecting “Generate” from the main menu. If you mix these tones at low-levels (say, at -40dB or less) with existing music, the music will mask (drown-out) the tones so that you can’t hear them.
thanks dvddoug, yes i know the generate function… i made it that way in some case and thought about it but i want to make it more subtle like said with the equalizer but which does not seem to work with single frequencies
Of course, the whole point of music is for it to be enjoyable. Different people have different tastes, but basically every artist & producer is already doing that.
I did begin with the brainwave technology to alter the human brainwave and then researched more into how make it subtle and improve the music in general to have a certain effect on the brain… Indeet this is not really about taste anymore its about body functions which are pretty much the same in all for the beings on the planet (a good example is water just imagine you can change the state of water in the body with music to be harmonic water that harmonize the human)
Does any filter really work with single frequencies, as opposed to slightly affecting neighbouring frequencies?
Gale
Its not a problem to slightly affecting neighbouring frequencies its about how to select the frequency i want to change… i cannot figure out how to select lets say 234kh on the interface its never exactly the frequency…
Hmm i think i can use sox…
If the exact frequency is crucial to your theories, then see: Audacity Manual . You can export any curve as a template for the correct syntax, then edit the curve in a text editor so the centre frequency is exactly what you want. When you are finished editing, import the curve back into Equalization.
The below code reduces a frequency centred on 234 Hz by 20 dB:
<equalizationeffect>
<curve name="brain waves">
<point f="234.000000000000" d="-20.000000000000"/>
</curve>
</equalizationeffect>
Ensure you keep all the slashes “/”.
Gale
Good point Gale.
It is the same problem as with a perfect lowpass filter that stops at exact 300 Hz and rejects all frequencies above.
The steeper the slope, the more begins the frequency in question to resonate.
However, this is essentially what the user wants.
The function that emphases frequencies in regular intervals is called “Comb”.
Example: Generate a Chirp tone, not too loud, and put this code into the Nyquist Prompt (Effect menu):
(multichan-expand 'comb; Alternatively: 'alpass
s; input sound
0.5; Decay time (less for subtle effect)
100); Frequency in Hz
You can of course change the decay time and the frequency and also the function itself, alpass is not so metallic/harsh as comb.
The example resonates at 100, 200, 300 etc Hz.
Reduce the decay time until your satisfied (applied to music, for example).
thanks gale it worked so far 
WOW Robert j.h. That is really what i looked for and i have applied it it sounds great, bit like an echo but really awesome Thankyou!!!
You mean Reverb? That’s no surprise since Reverberation is fashioned this way.
You could of course do It in to steps:
- use the code (with less decay or delay as I’ve wrongly named it)
- reverse the sound (effect menu)
- use the code again
- Reverse the sound back.
This centralizes the resonance over the tone.
Well i made one effect it was pretty neat, the next i would want to try is to try to apply it to the Solfeggio frequencies the way i have calculated them.
It is: Basefrequency is 84.5 and every frequency above would be: 110.5 more.
so: 195 305.5 416 and so on
I feared as much. The problem is that a comb filter’s interval is equal to its fundamental frequency.
Thus, You had to shift the whole spectrum by 25 Hz to 110.5, apply the comb filter and shift it down again to 84.5 Hz.
That’s hard to do because normal pitch shifting or resampling increases the frequencies by a percentage and not a constant value.
Another possibility is to boost the frequencies one by one. There’s also the question how broad the peaks should be. Musically seen, those peaks are measured with a Q factor. This means that the peaks have always the same broadness in terms of pitches.
As an example, The tone A is at 440 Hz and the q is such chosen that the width is one quint (about 330 Hz). This width doubles in each octave. In the beginning it will fit between 0 and 880 Hz but not at 4400 Hz, between 3960 and 4840 Hz because it is now 3300 Hz broad.
Thus, the Q factor must increase with each step. This increases the oscillation or resonance for high frequencies and might not sound very nice. That’s just a preliminary remark, provided there are no calculation rules for the width in your scheme already.