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Recording / Re: mixes - controlling the bass
« Last post by oldbobd on March 10, 2013, 12:49:42 AM »
Harry,

Your problem is typical.  A bass (acoustic or electric) tends to have a resonance at 100 Hz.  To make maters worse small speaker systems also tend to have their resonance around the same frequency.  I usually drop 100 Hz a bit and then increase 200 Hz by a little bit less.  One octave BW like Dino said.

You need to be careful about boosting 50 Hz - and always use a speaker system that actually reproduces 50 Hz, if you attempt this.  50 Hz notourisly will sound good on small speaks but sound really too much on big speakers. 

Having said that I will often boost 50 Hz slightly - could be because I'm from Detroit  ;D  You can sort of tell if it is right when the bass extends the sound of the kick.  Often the 50 Hz boost is not needed on rock but needed on R&B or bass-orientgated rock (read Detroit rock).

:old: bob
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Recording / Re: mixes - controlling the bass
« Last post by Silent Bob on March 09, 2013, 08:27:15 PM »
You're a big Yes fan, I see.
The bass doesn't seem especially unruly.  It could be a little brighter/louder for this type of music but not much.  What I notice is that the mid-lows on the bass drum and snare could use a *little* taming as they can mask the bass, along with maybe a little more presence on the snare (6KHz?).  Aside from that, I think you're doing is OK.  Something doesn't feel right about the keys (especially later in "Wholegrain", lots of unnatural top end) but keys run direct almost never sit right IMO.  The overall mixes are pretty good though and I think some leveling & broad, but subtle EQ in mastering will really help bring this project to life.

Dino, I don't think I've ever boosted 50Hz on a bass and often cut that range when a DI is involved.  I do that because the fundamental of the bass drum usually lives around there and boosting it on the bass often takes up too much energy.

Listen to how prominent the bass is here.  http://www.youtube.com/watch?v=NJM0QJFco_c  There isn't a ton of deep bass, but that Ric 1999 jumps out of the speakers at you.
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That does sound a lot better.  I've thought of doing this myself and wondered if some of the more liked compressors have something similar built into them already.  Really, the bass drum is too thuddy and loud in the mix.  I had thought of using a low-band compressor to tame the bass drum separately from the rest of the mix, but I thought my counter-EQ worked well enough.
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Recording / Re: mixes - controlling the bass
« Last post by Dino Ziogas on March 09, 2013, 07:48:48 PM »
Assuming your control room is adequately treated from an acoustics point of view, there are a few pointers:

1. When using mic'ed and DI'ed bass tracks you should delay the DI signal so it gets in phase with the mic signal. This happens because sound has to travel a small distance between the amp cone to reach the mic.

2. Bass guitar is usually inconsistent as various notes on the first two octaves are played and this is something best handled by EQ. Try to keep the second octave sounding about as strong as the first. Often this means cutting a few dBs @100Hz with a Q of 1 octave (=1.4) while slightly boosting 50Hz. Actual frequencies vary a bit but not much. This processing usually negates the need to use of a compressor on the bass.
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Recording / mixes - controlling the bass
« Last post by Harry on March 09, 2013, 06:17:16 PM »
I've been working slowly on some mixes of my tunes - see http://www.digestif.co.uk/mygrain/mygrain.html.
The first and last pieces have multiple sections, a thread recently discussed.
One of my biggest problems is keeping the bass under control - my arrangements tend to require a fairly strong bass yet my dynaudio monitors are very forgiving on strong bass - that's not a good combination! I take the monitors into account in the mix and take care not to overdo it, but still when I transfer to other systems I can find problems in the bass.
The tracking available for the mix was one mic plus a direct output from the amp head (which I use lower or not at all).
I tried different approaches in each piece - in the last one I added a little of the bass through a slightly distorted guitar amp, which helped cut through a little. In the first piece I mainly used EQ. In the second piece I was looking for a smooth feel with a warm bass sound so didn't want to use the distortion idea and didn't want to overdo the high mids. I ditched the direct track which wasn't helping. The mic in this case was a D112 whereas in the others it was the Heil PR30; the bass was a different one too, with more bottom end. I was finding some of the bass notes close to resonance on one test system, yet disappearing on a small system. That suggests more EQ is needed. I probably should have set up a calibrated subwoofer for mixing, something I put off (time and space the constraints as usual).
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In the recent Challenge where we mastered Spades Alone, I used a lower compression ratio, "auto" release and only a mild amount of Gain Reduction.  These are not my usual settings, but I wanted to try them.  The master sounded "OK" with this compression and I used it.

But when I compared my mastering to the other submissions, you could hear that pumping muddying everything up.  Silent Bob got around the pumping by using very little gain reduction ("There's a very light compressor, soft knee, 2:1 to help things sit a little better.  The gain reduction meter barely ever lights, but bypassing it takes away the punch.").

Personally I feel if you are going to use a compressor you should have gain reduction.

I went back to my file I had saved during the mastering and redid the compression step - leaving everything else processed the same way.  What I did with the compressor was EQ the sidechain according to Fletcher Munson.  The ears at normal listening levels (70-80 dBSPL) are much less sensitive to the bass and more sensitive to the upper midrange.

Here's what I Did, figure 1 is the EQ I used in the sidechain - approximate compensation for 70 dBSPL listening.



I set up the compressor with the same ratio, the same release as I originally used and adjusted the threshold to get the same gain reduction (about 3.5 dB).



For my loudness limiter (Wavelab's "Loudness Normalizer" I used the exact same settings as before.  There is a compensation for Fletcher munsion that you can put into the sidechain - to my ears 33% compensation is roughly equivalent to 75dBSPL.



The result is posted below, both the image of the waveforms for a few bars as well as a wav file.  It sounds a lot clearer and the image is quite different.  You'll first hear my submission and then the "clearer" compression.

Audio:  http://www.projects.masteringwebsite.com/Session11/compexample/comparecomp.wav



My personal opinion is that all of the a anomalies you normally run into with compression have to do with the compressor not "hearing" what the ear hears.

:old: bob



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Mixing Sessions / Re: Mixing competition 03/18/2013
« Last post by Dino Ziogas on March 09, 2013, 03:29:42 PM »
I think I'll too join in this time.

 8)

We'd love to hear your input Harry!
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Mixing Sessions / Re: Mixing competition 03/18/2013
« Last post by Harry on March 09, 2013, 03:24:08 PM »
These competitions are a great idea guys, I wish I had enough time to join in, they could be a great learning tool. I'll try to at least listen and vote on this one.
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Mixing Sessions / Re: Mixing competition 03/18/2013
« Last post by Dino Ziogas on March 08, 2013, 05:55:22 PM »
Believe it or not, the most interest use I found for a snare bottom mic is to use it as a reverb send source...
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Mixing Sessions / Re: Mixing competition 03/18/2013
« Last post by Silent Bob on March 08, 2013, 11:28:32 AM »
I'm not a fan either, but it works OK on this song.  I don't really like the single mic on top either, but mix of maybe 80% top mic and 20% bottom mic seems to work beautifully.  I keep wanting to try a mic pointed at the shell from maybe 10-20CM. The first time I heard of that technique was from the guy who said he put an SM57 right behind the other and inverted one to cancel bleed.  That seems like it would be a fine balance to maintain and I usually don't have time to experiment like that.  I guess just a normal 57 on the shell worked fine for Van Halen, but I'd be afraid of getting too much bleed from the hat etc.
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