Peaky notes, EQ and compressor limitations, uncontrollable

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Re: Peaky notes, EQ and compressor limitations, uncontrollab

Permanent link to this post Posted by Black Dog Bluez » Fri Feb 17, 2017 11:52 pm

Thanks Steve.. That paragraph corrected:

"I did one High Pass Filter (at 70 hertz/6 dBs) and then with EQ took nine decibels off the mid area between 160-250 hertz. Then just cleaned clicks and a few esses and repairs and that's it. Here is the finished song's plot spectrum/first 3-4 minutes read-out."

I might have been high when I wrote that originally - on chocolate and air pollution.
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Re: Peaky notes, EQ and compressor limitations, uncontrollab

Permanent link to this post Posted by Black Dog Bluez » Tue Feb 28, 2017 1:14 am

[re] unanswered questions:

#1. is there a normal plot spectrum look? or just guidelines as to what the graph shows or should show/..and/or are there just recommendations somewhere? what it's telling us/and where and when one might want to change something.. based on it?

#2. (what is the best combination of these possible recording/editing choices when exporting as 16 bit:) "recording:16 or 24 bit/editing: 16, 24, or 32[floating] bit" --- [again] when exporting as16 bit? what's best? ...

#3 At a certain point could there be editing/sound engineering questions that would be considered proprietary information (or secret to a select few)?

UPDATE: I've switched sites around and at this time have a new mostly proprietary method of things (previous voided). If you like my new sound and want to know more about my editing techniques feel free to ask,

Ronald Newman
http://www.SoundCloud.com/BlackDogSongs
Last edited by Black Dog Bluez on Thu Apr 20, 2017 10:01 pm, edited 1 time in total.
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Re: Peaky notes, EQ and compressor limitations, uncontrollab

Permanent link to this post Posted by Black Dog Bluez » Wed Mar 08, 2017 1:58 am

Black Dog Bluez wrote:[re] unanswered questions:
#3 At a certain point could there be editing/sound engineering questions that would be considered proprietary information (or secret to a select few)?

I guess so..

Anyway I've got a few ideas myself but 'am starting to feel a ah "proprietary bug" ... myself? (I guess/maybe?) ... or just a, "casting pearls before swine.." kind of feeling. Did I just sum up the whole internet in it's entirety? (or am I "...the kettle calling the pot black..."?). Or wait, maybe this is all just the newer vaccinations hastening some kind of zombie-like apocalypse we're all just in the early throes of? ... "Zombies" ... how fun ... (not!). I think I need to move (from Scottsdale Arizona, "The Chemtrail Capital of the World"). Surely the whole world hasn't turned to zombieville.. Okay will someone now please delete this comment it has nothing to do with.. ah where am I?

UPDATE: I've switched sites around and at this time have a new mostly proprietary method of things (previous voided). If you like my new sound and want to know more about my editing techniques feel free to ask,

Ronald Newman
http://www.SoundCloud.com/BlackDogSongs
Last edited by Black Dog Bluez on Thu Apr 20, 2017 10:01 pm, edited 1 time in total.
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Re: Peaky notes, EQ and compressor limitations, uncontrollab

Permanent link to this post Posted by steve » Wed Mar 08, 2017 10:22 am

Black Dog Bluez wrote:#3 At a certain point could there be editing/sound engineering questions that would be considered proprietary information (or secret to a select few)?

I don't understand how to equate the concept of "skills" with the concept of "proprietary". Most equipment and software include documentation (a user manual of some sort). Audacity has very comprehensive documentation (http://manual.audacityteam.org/ and http://wiki.audacityteam.org/wiki/Audac ... _Home_Page)

Black Dog Bluez wrote:#1. is there a normal plot spectrum look?

It depends on the type of material. To get an idea for a specific type of audio (say, "acoustic blues") try looking at good examples of recordings in that genre.
As a very general and loose approximation, look at the slope of "pink noise".
Generally, there shouldn't be big spikes or deep valleys in the spectrum when averaged over a long period.
Very low (sub-sonic) frequencies are usually rolled off to zero at 0 Hz, though some genres may have substantial energy at very low audio frequencies.
The upper frequency limit of very old music recordings may be limited by the equipment used for the recording.
The upper frequency of modern recordings may be limited by the audio format (low bit rate MP3s usually cut off frequencies well below 20 kHz).

Black Dog Bluez wrote:#2. (what is the best combination of these possible recording/editing choices when exporting as 16 bit:) "recording:16 or 24 bit/editing: 16, 24, or 32[floating] bit" --- [again] when exporting as16 bit? what's best? ...

Best to edit in "32-bit float" as this provides best quality processing and avoids risk of permanent damage if you go over 0 dB during the course of editing (the exported 16-bit file cannot exceed 0 dB).

Black Dog Bluez wrote:ah where am I?

Zombies :mrgreen:
9/10 questions are answered in the FREQUENTLY ASKED QUESTIONS (FAQ)
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Re: Peaky notes, EQ and compressor limitations, uncontrollab

Permanent link to this post Posted by Black Dog Bluez » Fri Mar 10, 2017 9:35 pm

thanks STeve ... re-calibrating ...
Last edited by Black Dog Bluez on Thu Apr 20, 2017 10:00 pm, edited 1 time in total.
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Re: Peaky notes, EQ and compressor limitations, uncontrollab

Permanent link to this post Posted by Black Dog Bluez » Sun Mar 19, 2017 11:30 pm

QUOTE-from Steve:
Very low (sub-sonic) frequencies are usually rolled off to zero at 0 Hz, though some genres may have substantial energy at very low audio frequencies.


I've never seen this --- "zero at zero" this is interesting/this may be why I seem to always be battling a low-end tone in my songs/song edits. I'll have to look at/analyze some more popular acoustic blues songs to see this..(look for this) What I've noticed (with pop acoustic blues) is the lows are up but just sloping down from the mids high point of the song per frequency analysis, and of course the older blues much more cutting of the lows.

-Still frustrated!

I recorded my last song in 16 bit ("WTF"/explict, on my site, link below) just to see if recording in 24 bit has been part of my problem-- At this point I am unsure but it turned out much less bassy/muddy then all my 24 bit edits, not sure if a fluke at this point though.. The only disadvantage with 16 bit compared to 24 seems to be the esses are worse and clicks harder to fix.. (so far/and that's a big problem!) But again unsure at this point. Could recording in 16 bit be better than 24 bit? Especially when the end result will be 16 bit and the edit will be in 32 bit float, a seemingly more compatible quotient 16 to 32 compared to 24 to 32 (??).

UPDATE: I've switched sites around and at this time have a new mostly proprietary method of things (previous voided). If you like my new sound and want to know more about my editing techniques feel free to ask,

Ronald Newman
http://www.SoundCloud.com/BlackDogSongs
Last edited by Black Dog Bluez on Thu Apr 20, 2017 10:00 pm, edited 1 time in total.
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Re: Peaky notes, EQ and compressor limitations, uncontrollab

Permanent link to this post Posted by steve » Mon Mar 20, 2017 12:03 am

Black Dog Bluez wrote:I've never seen this --- "zero at zero"

You will probably not see this in Plot Spectrum due to the relatively course frequency resolution at low frequencies.
To "see" zero energy at zero Hz, you need to think what "zero Hz" means. "Hz" (the "frequency") is the rate at which the audio is changing. "Zero Hz" means "not changing", or in other words "DC".

Image

So "zero energy at zero Hz" means that there is no DC offset.
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Re: Peaky notes, EQ and compressor limitations, uncontrollab

Permanent link to this post Posted by Tim Lookingbill » Mon Mar 20, 2017 6:44 am

I've had problems taming low end subsonic frequencies usually caused by room roar that was heavily squelched in original '70's rock mastering jobs that now suffer from a lack of bottom end bass that I'm attempting to put back in. Only when I do this using Audacity's EQ I get back the subsonic sound the original mastering engineer had to severely lower.

I had to use a high pass filter set to a bottom end roll off per octave starting frequency at 1 to 5Hz and apply different db settings. What's nice about Audacity's High Pass filter is that it can start at 1Hz but is limited in decibel increments where other HP filters like Apples AU HPF variety allows a custom db setting. What's not clear using either filter is the shape of the slope of roll off in how it smoothly shaves off this subsonic room roar without weakening the full sounding bass beat.

I've found it very difficult to surgically remove this low end hum sound without affecting the overall character of bass sounds.

Using Garageband's compressor seems to deal with these frequencies well enough along with tweaks with its EQ but isn't as precise as I'ld like but it does a decent job.
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Re: Peaky notes, EQ and compressor limitations, uncontrollab

Permanent link to this post Posted by steve » Mon Mar 20, 2017 8:43 am

Tim Lookingbill wrote:What's nice about Audacity's High Pass filter is that it can start at 1Hz but is limited in decibel increments

Audacity's high pass filter is not limited to decibel increments. If you want, say 3.1415926536 Hz, then just type it in.

However, do note that 1 dB is a pretty small increment. Amplitude changes that are less than 1 dB are difficult to hear - in fact, many people can't discern differences of less than 1 dB.
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Re: Peaky notes, EQ and compressor limitations, uncontrollab

Permanent link to this post Posted by steve » Mon Mar 20, 2017 8:51 am

Tim Lookingbill wrote:What's not clear using either filter is the shape of the slope of roll off

The shape is very close to an ideal Butterworth filter.
See: https://en.wikipedia.org/wiki/Butterworth_filter
and: http://manual.audacityteam.org/man/high ... ilter.html
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