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Some videos on websites have the sound volume so low that even with all sound settings at maximum levels it's hard to listen.

I'm looking for an app that would allow me to boost the Mac's volume. Something similar to VLC volume controls.

I already looked at Audio Hijack, but it has way too much features for what I'm looking for. Anything free of charge would be a plus. :)

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1  
50 "plus" points to reinforce the "free of charge" part of the question! – cregox Mar 27 '14 at 19:25
    
I have encountered too videos with sound too low. In these moments, I have the strange feeling of being close to powerful but powerless. – Nicolas Barbulesco Mar 30 '14 at 0:55
    
lmgtfy.com/?q=increase+sound+volume+mac ... Was it really so hard? – AMomchilov Mar 30 '14 at 1:47
    
@XAleXOwnZX — Your search gives me “about 1 280 000 results”. I perfectly understand that David do not examine all of them but rather ask for specialist advice in a site which is made for that. – Nicolas Barbulesco Mar 30 '14 at 15:54
    
Sadly, there was nothing new after my bounty! :( – cregox Apr 3 '14 at 22:27
up vote 8 down vote accepted

Boom

It works pretty well. I had similar issues on my Mac, didn't like being glued with the headphones forever so I got this just yesterday. And I loved it. It's not free, but for $5 it works like a horse.

enter image description here

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1  
It's not bloated with features, the price seems quite OK, and it works just perfectly. Thanks for pointing it out! Changed the accepted answer to this one. (Just let me add a link for easier reference: globaldelight.com/boom ) – David Santos Feb 20 '11 at 18:13
    
I'll also chip in that Audio Hijack Pro is so very capable, but Boom is clean, sleek and does exactly what I want for boosting chat and sound that isn't tied directly to the keyboard volume keys / system volume. – bmike Jul 11 '11 at 20:07
1  
I use Boom. Simple, clean, not buggy. Works for me. – user18558 Feb 11 '12 at 1:28
1  
This will break the system sound after a system crash until the app is launched again. So if your system crashed and you don't get any audio, try launching this. – Daniel Beck Feb 11 '12 at 8:45
    
Probably not what you're looking for if you're in a Hackintosh. Boom boosted my audio alright, but at the cost of distorting the hell out of it. If this also happens to you, consider using front panel audio which is usually louder. – Lucio Paiva Oct 15 '14 at 1:18

The application you are looking for is called Hear. It's pretty expensive though. I've been looking for a program to do something similar for months, but on the opposite end of the spectrum (my volume to my USB audio adapter is way too high, even with the volume all the way down). As far as I can tell, there isn't a free program out there that can do this. You can also try messing around with the built-in Apple utility called "Audio MIDI Setup" (in Applications/Utilities) and creating an aggregate device, then messing with the preamp on this device, but so far I haven't had any success with this.

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1  
Thanks for your suggestion! Hear, just like Audio Hijack, has way to many features. My sole objective is listening to videos on some news sites. Its price seems adequate to the amount of things you can do with the software, but is indeed expensive for my particular purposes. This is why I'm not accepting the answer. – David Santos Sep 19 '10 at 13:36
    
Maybe the price has dropped but it is $20 now and I don't really see that as all that expensive for software. – pthurmond Apr 28 at 3:49

If you like to use iTunes to listen / watch your media files... Some time ago I found new easy way to get the sound a bit louder. In iTunes Library select media with low volume and press cmd+i. Go to Options and make Volume Adjustments

How to boost sound with iTunes

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You can go with custom equalizer and then amplify your sound out

Instructions

Requirements
  • Soundflower – free download from Google Code

  • AU Lab – free download from Apple Developers (requires free Apple Dev ID)

  • Download and install both Soundflower and AU Lab, you will then need to restart your Mac to have full access to the audio components. Once rebooted, follow along with the instructions below:

Set Up a Universal Audio Equalizer for Mac OS X

  1. Set System Volume to the maximum level, do this either through the menu bar or by hitting the Volume Up key repeatedly

  2. Open System Preferences from the  Apple menu and select the “Sound” panel, followed by the “Output” tab. Select “Soundflower (2ch) from the Output list

  3. Now launch AU Lab, found in /Applications/Utilities/

  4. From the “Audio Input Device” pulldown menu, select “Soundflower (2ch)”, and then from “Audio Output Device” menu select “Stereo In/Stereo Out”

  5. Click the “Create Document” button at the bottom of the screen At the next screen, look for “Output 1” column and click the “Effects” dropdown, selecting “AUGraphicEQ”

  6. This is your new system-wide equalizer, set it how you see fit. Changes here will impact all audio output on the Mac

  7. When satisfied with the EQ settings, hit Command+S to save the EQ settings file and put it somewhere easy to find like the Documents folder Now open AU Lab preferences from the AU Lab menu, click on the “Document” tab and click the radiobox next to “Open a specific document”, selecting the .trak EQ file you saved in the previous step

  8. Optional final step: If you want the EQ settings to load on every Mac OS X boot, right-click on the AU Lab icon, go to Options, and select “Open at Login”

Note: It’s important to note that AU Lab must be running in order for the equalizer to have an effect, keeping it running will consume a small amount of CPU resources but it’s much less process hungry than some of the third party alternatives available on the market.

Due Credit : http://osxdaily.com/2012/05/18/equalizer-for-all-audio-mac-os-x/

Cheers Equalizer

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Could you not simply download the movies and play them in VLC or something similar? I'm not aware of anything that'll boost system wide sound, but as you don't seem to have attracted any answers, I'm trying to think of alternatives.

Quicktime can play FLV files, and if you use QT7 Pro, it allows you to boost the sound using the Track Properties pane. Would that be an option for FLV videos?

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Playing through VLC doesn't work for web-based movies, flash animations, … – Studer Aug 29 '10 at 19:02
    
Thanks for your suggestion, Chops. Real Player is able to download .flv videos. And both RP and QT play them, though I've only been able to adjust sound on RP. Not very convenient, but indeed an alternative. – David Santos Aug 30 '10 at 21:47
    
You can adjust the audio on QT Player to using Cmd-J to open properties (I believe this is on QT7 Pro only though, which is free in Snow Leopard). Again, as you said, not massively convenient though. – pauldunlop Aug 31 '10 at 19:39
    
After some experiencing, I'm accepting your answer. Until some simple software is available for boosting sound output on the mac, your suggestion, despite not very convenient, is a viable alternative to the expensive software out there. Thanks! :) – David Santos Sep 19 '10 at 13:42

Did someone try this? I used in the past and it should do the job http://jackaudio.org/

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We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.

    
Can you point how it can do the job? – Idolon Apr 8 '15 at 17:50

I just found the free app Bongiovi DPS. It is free and simple and has some great audio enhancements.

http://bongiovidps.com/

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Hear is a good option and has several different parameters to change and customize. You can add special effects and adjust the intensity with sliders to suite your own preferences. There are also predefined sets for specific music genres and wether you are listening via headphones or directly from your computer's speakers. It gives you a lot of flexibility to change and set the sound to your liking.

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