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frequency sweeps for free? - Page 2

post #16 of 27
1/29/02 at 10:41pm
Quote:
I would provide instructions, but I don't know if the demo version can make noise/tones, let alone save.
The demo version of Cool Edit lets you pick any two subsets of functionality when you start up. Saving files is one subset, leaving one for tone generation. I even used Cool Edit for a few months that way -- annoying, but still usable. I guess that's the point -- Syntrillium eventually got my money!
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post #17 of 27
1/30/02 at 12:17am
Hmm I got the solid tones....

Apparantely I can't hear 20khz (?@!?!) grr... I can hear 15hz CLEARLY though, though I'm not sure if that is really 15hz (nor is that 20khz for the matter).
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post #18 of 27
1/30/02 at 12:27am
Lol, I know, that was my initial experience as well. You'll pick it up if you keep listening to it. I don't know if its our ears triggering, or our brains ******** with us...
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post #19 of 27
1/30/02 at 1:56am
I've heard some sound cards and headphones make a sound when they first start playing, so sometimes you hear something initially, but then nothing when you're beyond your range.
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post #20 of 27
1/30/02 at 2:13am
It takes about 5 min. to make your first wav on Stomper Hyperion--probably less time than it takes to download the wav--and after that you can make whatever tones you want...
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post #21 of 27
1/30/02 at 7:50am
Sounds like a good idea Joe. Could you post a link to download from, and set of instructions for everyone?
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post #22 of 27
2/2/02 at 2:26pm
Thread Starter 
Using Audio&Me's WAVs, I'm already finding a noticable difference in bass performance of the HD600s after 8-10 hours.

I'm looping all the WAV sweeps with a live Dream Theater song (with saxaphone) on the end. I figure that combination has to cover just about everything.

Kelly
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post #23 of 27
2/2/02 at 11:52pm
Stomper Hyperion 5 (link's already been posted anyway, hey )

1. Remember to set Special->sampling frequency = 44.1kHz
2. 1st tab is for frequency setting, you can frequency for the start and end of each oscillator (can add multiple oscillators concurrently) The slider on the top is a variable in a quadratic function for the variation of the frequency, I think, 1 sets it to linear. There's an option for setting frequency in terms of Hz or key.
3. 2nd tab for amplitude setting--starting amplitude, ending amplitude, slider -> slope... max. non-clipping amplitude = 1
4. 3rd tab--waveshape--sine wave, square wave, whaddaya call the rest of them
5. Timescale: start and end time is in terms of no. of beats. If you set bpm = 60 the time becomes in terms of seconds. Default is 120bpm though.

That's about it I think. You can always read the help
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post #24 of 27
8/31/03 at 2:37am
Thanks for the link. It's fun to play around with frequency sweeps to see how your gear performs. But it looks like I can only hear up to 17.5 khz though
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post #25 of 27
8/31/03 at 2:45am
Hi Joe......I haven't seen you around Head-Fi for a while.





Anyway, I downloaded Stomper Hyperion.






What it the correct frequency responce curve? I have been using it with amplitude on "396.8" (maximum) and "1" frequency (perfect right triangle).


Is this the best way to test?


One thing I found cool is changing the waveform to a PWM (DSD like) square wave. I noticed that the higher the frequency the more artifact occured. Is that what SACD sounds like ?
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post #26 of 27
8/31/03 at 1:17pm
Quote:
Originally posted by Czilla9000
Hi Joe......I haven't seen you around Head-Fi for a while.
Well, hi

Quote:
Anyway, I downloaded Stomper Hyperion.

What it the correct frequency responce curve? I have been using it with amplitude on "396.8" (maximum) and "1" frequency (perfect right triangle).

Is this the best way to test?
No

The maximum amplitude that can be recorded correctly is 1. I recommend a bit lower, like 0.95. 396.8 is nothing but clipping clipping and more clipping

Quote:
(perfect right triangle)
If you want to hear a pure frequency, use sine wave.

Quote:
One thing I found cool is changing the waveform to a PWM (DSD like) square wave. I noticed that the higher the frequency the more artifact occured. Is that what SACD sounds like ?
No

The PWM signal is only a way to represent the audio inside the system. It gets filtered on the way out and nothing like those square waves would come out at the output (unless the recording specifies square waves)

Hope that clears things up

Joe
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post #27 of 27
3/8/10 at 2:22pm
Oh, and I wonder what format A&M is recording his wavs in, because most formats only record up to 22.05kHz

'course, Stomper allows you to go up to 39kHz too, but will just record an aliasing artifacts, since its highest sampling rate is 48kHz and even then you can only record sounds correctly up to 24kHz.

A&M, unless you are using 48kHz / 96kHz, you can't be recording 24kHz correctly and that won't be 24kHz you're actually hearing.
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