sine waves in rap?

[Max_Power 10+ year member]

I was listening to jeezy's hypnotize the other day and it hit me. The bass lines in rap, hip/hop, r/b, etc is basically sine waves.

My question is then, with all the concern for setting gains for subwoofer amps with a 50hz tone, will the amp ever see a full power curve? What I mean by this is, most people claim music is dynamic and therefore setting gains with a sine wave should limit the possibillity of damage. BUT, if music with heavy bass lines is played, aren't you going to eventually hit a 50hz tone and get the full power you asked for out of your amp? could this mean possible damage?

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[T3mpest 10+ year member]

I was listening to jeezy's hypnotize the other day and it hit me. The bass lines in rap, hip/hop, r/b, etc is basically sine waves.
My question is then, with all the concern for setting gains for subwoofer amps with a 50hz tone, will the amp ever see a full power curve? What I mean by this is, most people claim music is dynamic and therefore setting gains with a sine wave should limit the possibillity of damage. BUT, if music with heavy bass lines is played, aren't you going to eventually hit a 50hz tone and get the full power you asked for out of your amp? could this mean possible damage?

The full power you ask for from the amp shouldn't damage it. Secondly, even rap music won't be a full duty 100% cycle, so no, you should be fine.

 

[Max_Power 10+ year member]

The full power you ask for from the amp shouldn't damage it. Secondly, even rap music won't be a full duty 100% cycle, so no, you should be fine.

Is it how its recoreded at -3db or more?

 

[Immacomputer 10+ year member]

I've seen plenty of bass type music with 0dB content in it. And if you set everything up correctly, you don't have to worry about whether you're getting full power or not.

 

[helotaxi 5,000+ posts]

I think I have one bass CD (from like '92) that has more than a couple cycles of a pure sine wave that's on something other than a test track. There's no "beat" to a sine wive it's just a monotone hum. Pretty boring. All sound is composed of sine waves. It's just that you either don't have many cycles of a given freq or that you have multiple freqs overlaid on each other such that the summed output no longer looks like a pure sine wave. If you were to break out the individual tones and plot them all you would see a bunch of sine waves.

The freq of the tone has nothing to do with the level. Setting the gain with a 50hz tone or a 40Hz tone is irrelevant. The amp should have a flat frequency response so if the gain is set with a 0dB 50Hz tone and then you test it with a 40Hz 0dB tone you should get the same voltage. If you don't, either you have a filter that is affecting the response at 50 or 40Hz or the amp sucks.

 

[Immacomputer 10+ year member]

If you don't, either you have a filter that is affecting the response at 50 or 40Hz or the amp sucks.

Or the meter sucks which is probably true for 95% of the people on this board.

 

[helotaxi 5,000+ posts]

Or the user...

 

[dman4486 5,000+ posts]

Or the user...

the correct answer