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Author Topic: Guess the Audio Source!  (Read 1967 times)

Charlie Zureki

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Re: Guess the Audio Source!
« Reply #10 on: November 23, 2012, 09:54:37 am »

   It's an airplane or a blimp.

   Hammer
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Do it the right way....don't be a Dino!

John Halliburton

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Re: Guess the Audio Source!
« Reply #11 on: November 23, 2012, 10:07:55 am »

Ship's hold, picking up the engine rumble...

Or a locomotive perhaps, in the cab.

Best regards,

John
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Ned Ward

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Re: Guess the Audio Source!
« Reply #12 on: November 23, 2012, 07:38:15 pm »

Link to the sound source is here - will need to re-record tomorrow as i inadvertently left the "mastering" HPF on from a past band rehearsal, which is why the low end isn't matching up with what I saw on Audio Kit...
http://soundcloud.com/ned-1-2/mystery-sound-5/s-kianp

67 Pontiac LeMans 326 through Flowmaster exhaust.
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Ned Ward

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Re: Guess the Audio Source!
« Reply #13 on: November 25, 2012, 03:15:25 pm »

Not that this will come as a shock, but perhaps AudioKit is not the most accurate FFT when it comes to low end. Here's the Waves frequency analyzer screenshot from the file I took yesterday, without mastering HPF on - not much different. It certainly feels lower, and sounds great, but not sure I'm getting that low (at all). May try again today with my Zoom H2 just for fun. 


Has anyone found a RTA/FFT that seems more accurate given the built-in mic? This is just for fun, so I'm not using it for mission-critical gigs.
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Riley Casey

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Re: Guess the Audio Source!
« Reply #14 on: November 25, 2012, 06:37:33 pm »

And changing the RTA would change the response of the mic how? 

http://blog.faberacoustical.com/2010/ios/iphone/iphone-4-audio-and-frequency-response-limitations/

Not that this will come as a shock, but perhaps AudioKit is not the most accurate FFT when it comes to low end...

... Has anyone found a RTA/FFT that seems more accurate given the built-in mic? This is just for fun, so I'm not using it for mission-critical gigs.

Ned Ward

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Re: Guess the Audio Source!
« Reply #15 on: November 26, 2012, 03:41:33 am »

Riley - I think you misread my post.

I'm not looking to change the mic response of my 4S; just trying to find an app that more accurately depicts what it's measuring. From my experiment, Audio Kit's FFT is lacking accuracy, especially on the low end. If there's a better app given the hardware limitations of an iPhone 4s, by all means let me know.
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TrevorMilburn

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Re: Guess the Audio Source!
« Reply #16 on: November 27, 2012, 08:09:16 am »

The show I did stacks and racks with him last week-he was setting off car alarms across the street-with the OPENING band.  He mixed 3 of the 4 bands.

We were on the 2nd floor-so not much transferring directly to the ground.
Saw this video of one of the bands - I had to comment on the quality of the sound which I though was a desk feed. But I was wrong - it was the PA sound via the camera! Well done to Danley (and Evan)!
http://youtu.be/a8WWFB-Qr3Q
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Ned Ward

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Re: Guess the Audio Source!
« Reply #17 on: November 28, 2012, 01:37:48 am »

Trevor - that video is great - super clear sound, and the camera shaking from all the bass. Perfect!


OK, so I recorded again with my Zoom H2, set to 16/96 (was going for 24/96, but missed a setting. It was pre-coffee early).


This time, the PAZ frequency tells a different story, and not surprisingly, the zoom H2 is better at recording audio sources than an iPhone. Hopefully this isn't shocking news.


Sending to the iPhone app makers, as while the iPhone can't record under 100Hz, wondering if it's inferring FFT from overtones, etc. But, it did pick up the same 47Hz bump that's in the audio.


path for the audio - http://soundcloud.com/ned-1-2/stereo-bounce-l


Thanks and enjoy.

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