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November 14, 2007, 01:08:32 PM
62159 Posts in 6155 Topics by 2113 Members
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Topic: generating a sweepable sine wave  (Read 80 times)
« on: November 11, 2007, 07:39:16 PM »
dobro Offline
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Posts: 93



I've figured out how to generate a sine wave in 1.5 - it's easy - but I want to be able to sweep up and down the frequency range with that sine wave, in the same way that you can sweep frequencies in an EQ unit.

Doable?
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Reply #1
« on: November 11, 2007, 08:37:23 PM »
alanofoz Offline
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Posts: 453



In the "Generate Tones" window uncheck "Lock to these settings only. The two tabs will change to "Initial settings" and "Final settings". Enter a different frequency under each tab. The result will be a sine wave which sweeps from the initial frequency to the final frequency.
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Cheers,
Alan

Bunyip Bush Band
Reply #2
« on: November 12, 2007, 07:16:10 AM »
dobro Offline
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Alan, you're my new hero.  Thanks.

It was scary listening to a few different waves through headphones.  At certain frequencies, the perceived loudness dipped, despite the fact that the meter stood steady at -6 dB.  So much for my hearing.  I think I'll explore where my hearing's weak, and then keep that in mind when mixing.  Sheesh.
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Reply #3
« on: November 12, 2007, 09:16:05 AM »
SteveG Offline
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Posts: 8260



It was scary listening to a few different waves through headphones.  At certain frequencies, the perceived loudness dipped, despite the fact that the meter stood steady at -6 dB.  So much for my hearing.  I think I'll explore where my hearing's weak, and then keep that in mind when mixing.  Sheesh.

How do you know that it's your hearing? Why couldn't your headphones have a frequency response all of their own? (They do, you know...)

And actually, it's worse than that. Most headphones form a complex resonant cavity with the ear, and this can dramatically alter the total response that you, as an individual, will experience from them. And your experience won't necessarily be the same as anybody else's with the same headphones. Open-backed ones are generally a lot better from this POV, but they are by no means blameless. It's one of the reasons that when you mix, you really shouldn't do it with headphones at all.

So don't write your hearing off yet on the basis of a swept sine test through headphones - you haven't really tested it at all.
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Reply #4
« on: November 12, 2007, 06:14:37 PM »
dobro Offline
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Posts: 93



That's more or less exactly what somebody else said on another board.  I'll try the same test through my monitors.  (But then I'll be dealing with anomalies in my room.  But at least I'll be able to compare.)  Thanks.
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