what album has sub-50Hz frequncy?

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Leeking

Leeking

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I was talking to a friend who is in speaker design the other day. He was actaully working on a sub-woofer project and said that he was having a hard time trying to test the speaker for frequency 20-50Hz.

I told him most commercial albums are mastered with 50Hz roll-off as most consumer speakers won't go that low.

So, he ask me for any album with frequency below 50Hz?

Any idea guys? :)
 
I'm merely guessing here, but I have a good feeling most Aphex Twin and Autchere albums would qualify, as well as Ruby Vroom by Soul Coughing.
 
VotaIdiota said:
I'm merely guessing here, but I have a good feeling most Aphex Twin and Autchere albums would qualify, as well as Ruby Vroom by Soul Coughing.
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errr, I am not familiar with those albums, mind explaining why do you think so? :)
 
Well, basically no. The audio spectrum ends for most of us at about 40-50 hz. Below that is subsonic, and can only be heard by a cockroach. You can hear the higher harmonic overtones of these low frequencies, which generally sucks. For testing speakers, you need a signal generator that can produce the pure low frequency, a measurement mic that can pick it up, and measurement meter or oscillascope that can read it, or one hell of a trained cockroach.-Richie
 
Most drum and bass electronica gets pretty low. There's all kinds of bass cd's as well that would do it. You know, the kinda shit kids play when they pull up beside you and shake your mirrors off...
 
There are lots of commercial bass tester cds that you can probably find at your local music store. I'm not sure what any of them are called, but they are usually lurking arounf the hip hop section.

You could also search for "Bass Tester" in a file sharing program and see what pops up.
 
subtractor said:
Most drum and bass electronica gets pretty low. There's all kinds of bass cd's as well that would do it. You know, the kinda shit kids play when they pull up beside you and shake your mirrors off...
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DOH!!!!
I completely forgot Jungle!

yeah, anything by a guy by the name of Roni Size should do it. :eek:
 
In fact, I just did a search in WinMX...

69 Bass Tester
Lucasfilm THX Speaker Tester
Bass Mechanics - Ultimate Woofer Test

And so on...

There's a lot out there, but I'd recommend picking one up on CD.

Hope this helps.

---Jason
 
Yeah, I've got alot of his stuff on vinyl.
There's parts of the new nin dvd, particularly the opening screen that shake my whole living room. My subs goto 18hz and it kicks em in the gut. It's one of the best sounding DTS dvd's ever.
 
Thanks for the help guys! very infomative!

I'll ask him to check out those bass tester CDs! :)
 
Leeking said:


I told him most commercial albums are mastered with 50Hz roll-off as most consumer speakers won't go that low.
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this is far from true.
 
That might be a good way to record overall with better effect. But be assured there's plenty of stuff out there that hitz 20hz.;)
 
subtractor said:
That might be a good way to record overall with better effect. But be assured there's plenty of stuff out there that hitz 20hz.;)
Click to expand...

neil young?
:confused:
 
your answer!

Pink Floyd's Dark Side of the Moon has a heart beat at the very beginning of the CD. It's a 20Hz signal.

dlv
 
also!

you could also download sine waves at 20-50hz but they won't sound the same as what would normally come out of those speakers. I know CEP 2.0 and probably most of the other audio programs will generate a sine wave at whatever signal you wish. You could even have a sweeping wave that went from 20hz to 50hz and back again if you want...

WARNING!: DO NOT create a sine wave that goes up to 20khz..blood will gush from your ears and your head will explode.
Okay so it might not be that bad but It's VERY painful to listen to!

dlv
 
I am not very knowledgeable about frequencies, but I sing bass and I believe low C (2 down from Middle) is about 60 hz. Some bass singers can sing well below that. I think you have to be careful about rolling off low frequencies.

Larrye
 
Somebody help me out here. So Dark side of the moon has an alleged 20hz signal. This is not in the audio spectrum, and *no* human can hear it. Of course. we can hear the higher overtones which are analogs (multiples) of 20hz. If you're really unlucky, depending on the temperature, altitude, and humidity, around 40hz, you'll hit the resonating frequency of air, which at a high enough amplitude, will disrupt the middle ear, causing vertigo, nausea, and vomiting. If you can find the resonating frequencies of your windows and glassware, you can also blow them out too.
Other than trying to diagnose standing waves and phase problems, what is the point of producing, recording, or measuring a subsonic frequency? If there is a point, I'll break out my ECM8000's and record a medly of Irish silent dog whistle tunes, and "Great songs I have felt."-Richie
 
Somebody help me out here. So Dark side of the moon has an alleged 20hz signal. This is not in the audio spectrum, and *no* human can hear it. Of course. we can hear the higher overtones which are analogs (multiples) of 20hz. If you're really unlucky, depending on the temperature, altitude, and humidity, around 40hz, you'll hit the resonating frequency of air, which at a high enough amplitude, will disrupt the middle ear, causing vertigo, nausea, and vomiting. If you can find the resonating frequencies of your windows and glassware, you can also blow them out too.
Other than trying to diagnose standing waves and phase problems, what is the point of producing, recording, or measuring a subsonic frequency? If there is a point, I'll break out my ECM8000's and record a medly of Irish silent dog whistle tunes, and "Great songs I have felt."-Richie
 
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