GS1 wrote:...to return to the question again, would I cut or boost a given range as wide as the #s given (I.e.between 60-100) or some smaller frequency range within the larger one indicated i.e. 70-90 which would be an octave or Q 1.4...If I cut or boosted 60
-100 this would be Q .7 which I see listed as the widest area on the info I have re-Q#s...
I'm sorry... I'm really struggling to understand your question because it's a solid wall of text...... but fundamentally, there is no absolute right or wrong answer here. You determine the EQ bandwidth depending on the requirements of the material and what you're trying to achieve.
Do you need to alter the level of a very narrow band of frequencies, perhaps to reduce an annoying resonance, say, or do you need to alter a broad band of frequencies to make a sound more or less prominent in the mix against other instruments and sounds? That's something only your ears -- combined with some experience -- can decide.
...I'm assuming re-"cut narrow/boost wide"that that the higher Q #s are for surgical cuts
Our ears are certainly much more sensitive to boosts in general, and smaller bandwidth boosts particularly so. It's because they sound resonant and we can spot that quite easily. So if you have to boost, keep the gains small and the bandwidths wide.
However, it's usually much better to reduce elements we don't like, rather than boost those we do, and that's because our ears tend not to notice or mind narrow ranges of missing frequencies, even with quite large amounts of cut.
So yes, save the high-Q (narrow bandwidth) settings for 'surgical' cuts!
I'm seeing larger areas indicated for boosting/cutting i.e.cutting between 160-600 for the kick drum
The modern kick drum sound is actually quite artificial, and it has become the norm to use a relatively narrow boost to promote the fundamental resonance around 80Hz, and then to scoop out a wide bandwidth over the midrange from about an octave above (160Hz or so) up to around 1kHz. Another fairly narrow peak is usually then added to emphasise the beater click around 3kHz... in broad terms (every drum is different!). This practice shapes the kick drum tone into the sound we expect in a modern recording, and leaves space in the spectrum for the bass and other instruments.
...shelf boosts/cuts would be about reducing or increasing the frequencies above or below a given one by a given fixed amount and could affect a large range given the center frequency set if I'm not mistaken....
Shelf EQs don't have a 'centre frequency', they have a 'corner' frequency -- meaning (in simple terms) the frequency region where the shelf levels out. In some EQs this is adjustable, but in many the corner frequencies are fixed, often at 100Hz and 10kHz. That being the case, the high-shelf covers a nominal one octave, while the low-shelf covers a bit over two octaves... However, because of the gentle slope into the shelf, the audible effect actually spans several octaves.