How Loud?, Measuring Loudness (Decibels) |
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lun. 22 mars 2004, 16:29
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korektphool, I don't know of any application that calculates the average decibel rate of a song. There is probably a DAW that does it. I would just dump the track into Soundtrack or another DAW and watch what it peaks at and what its softest level is. Also, isn't the decibel range dependant on the recordings wordlength? (i.e. 16 bit or 24 bit) At anyrate, maybe you should write the program that does this. Here is a hardware device that measures levels: http://www.tnt-audio.com/clinica/spl-meter_e.htmland here a link to some documents on loudnesshttp://www.zainea.com/soundandmusic.htmI would check out the selections in: loudness & dynamicsmaybe also try some of the documents in mostly psychoacoustics
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Ableton Live 4.1 Reason 3 Mac OS 10.3.8 G5 Dual 1.8 Ghz 2 GB RAM 160 HD EzQuest 120 GB 7200 Firewire HD EzQuest 200 GB 7200 Firewire HD - Pro Audio M-Audio Firewire 410 (driver 1.4.3) Behringer B1 Microphone (2x) Behringer HPS3000 Headphones Yamaha DX-11 going through a MidiMate XP (Midi to USB adapter)
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ven. 26 mars 2004, 05:11
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Alright....Here's something that screws everyone up! The dB... The dB is simply a way of descriding the ratio between two quantities! It is not a unit of measure in and of itself. However, if you attribute a reference to the dB it becomes useful.
Ex. dBm-ratio between 2 electrical POWERS dBV-between 2 voltages dBSPL-between sound pressure levels
If you are trying to find out how "hot" a signal is recorded on a medium, play it back on whatever DAW you have and meter dBm. Now, if your meters have the ballistics and scale of typical VU meters, 0VU=+4dBu(pro standard gear) or -10dBm(consumer standard).
If Your meters are on a dBfs scale (usually the case on digital gear), 0VU=anywhere from -20dBfs to -8dBfs.(There is no standard...it depends on the gear manufacturer).
As for metering the human perception of the loudness of that sample in dBSPL....that depends on about a million things...like....how loud is the volume turned up on your monitors!
Hoped this helped...maybe i didn't even come close to answering...but i hope you learned something (seeing as you're in school and all)
-Good luck!
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ven. 26 mars 2004, 20:44
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Hey dude!
VU stands for volume unit. *correction for last post:consumer operating level=-10dBV*
As I mentionned in my last post...the way to meter the level of a signal on a storage medium is by looking at those meters on your DAW. Unless the level of that signal never changes, you will have to "guesstimate" where that signal's level hangs out.
Just to clear up something for your last post...bitrate does not affect the minimum or maximum level at which you record signal (or range)...it only affects how many divisions there are between 0 level(-infinity) and 0dBfs(max number of 1s in the word).
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ven. 16 avril 2004, 13:41
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I was thinking you might be able use this plugin to measure relative loudness by comparing song levels. http://www.elementalaudio.com/products/ins...ctor/index.htmlCould this be done, let me know what you think? FYI - the plugin appears to be free!
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Ableton Live 4.1 Reason 3 Mac OS 10.3.8 G5 Dual 1.8 Ghz 2 GB RAM 160 HD EzQuest 120 GB 7200 Firewire HD EzQuest 200 GB 7200 Firewire HD - Pro Audio M-Audio Firewire 410 (driver 1.4.3) Behringer B1 Microphone (2x) Behringer HPS3000 Headphones Yamaha DX-11 going through a MidiMate XP (Midi to USB adapter)
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ven. 4 juin 2004, 02:43
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bias-peak comes with a free plugin by Elemental Audio called "Inspector". Check it out. http://www.elementalaudio.com/
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