Another pocket lockwood success

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Irvine.J
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re: Another pocket lockwood success

Post by Irvine.J » Sun Jun 18, 2006 1:27 am

Hi Jansen, I'm a qualified audio engineer, who hasn't attempted audio analysis of a PJ yet, though would very much like to. Can you post the stereo recording of your engine so I can play around with it.
-I dont have a high quality stero recording of a PJ, and I dont have a PJ to record...yet :D - Plenty of mixers compressors etc etc I need something to work with.

I'll upload some software onto my website for all to trial for ananlysis.

I'm guessing those multiple peaks are harmonics, you can calculate what they -should- be from 710 hz.**just a guess**

47
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Last edited by Irvine.J on Sun Jun 18, 2006 6:36 am, edited 2 times in total.

Jmitchell
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re: Another pocket lockwood success

Post by Jmitchell » Sun Jun 18, 2006 1:32 am

I meant that I was running over 10PSI Acetylene, and didn't want to go above 15, as it can become unstable.

Mike Everman
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Re: re: Another pocket lockwood success

Post by Mike Everman » Sun Jun 18, 2006 7:10 am

Number47 wrote:Hi Jansen, I'm a qualified audio engineer, ... I need something to work with.

I'll upload some software onto my website for all to trial for ananlysis.

I'm guessing those multiple peaks are harmonics, you can calculate what they -should- be from 710 hz.**just a guess**
Here's a good recording to play with, made with a mixing board and a good mike. If you put your analysis software in oscilliscope mode, you'll see the clipping of typical video files.
This one has some reliable harmonic content.
Attachments
mikhail chinese run 1.zip
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re: Another pocket lockwood success

Post by hagent » Sun Jun 18, 2006 7:35 am

The frequency is changing - Lower at the start to higher at the end of the audio clip.

It appears to be around 267 - 268 Hz at the end. It's still shifting a Hz or two though. To my ears it appears to be the major tone of the PJ.

Hagen
Hagen Tannberg

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