1 second .wav files.

LT spice, Curve Captor, PSUDII and whatever other sims you can think of.

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dave slagle
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Joined: Sat Jan 22, 2005 3:54 am
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1 second .wav files.

Post by dave slagle »

I'm looking for some demanding music to enter into spice for real world comparisons. Attach a .wav file here with a brief description then others can use it as a source for sims. Please keep the important part in the first 1 second, longer clips are fine and would be interesting to look at but for the more complex analysis, I'd like to see the good stuff in the first second.

below are some pics of "purple Haze"

To use the file in a sim, you simply need to put the .wav file in your LTsice folder and label a voltage source with... wavefile="file name"

dave
Attachments
Waveform in the time domain.  The peak of ~455mv is 12dB above the RMS.
Waveform in the time domain. The peak of ~455mv is 12dB above the RMS.
Untitled-1.jpg (120.58 KiB) Viewed 12872 times
jimi.wav
the intro to purple haze
(196.33 KiB) Downloaded 1025 times
FFT of the clip
FFT of the clip
Picture 15.png (25.26 KiB) Viewed 12935 times
Last edited by dave slagle on Fri Jul 17, 2009 7:35 pm, edited 1 time in total.
dave slagle
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Joined: Sat Jan 22, 2005 3:54 am
Location: NYC
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Post by dave slagle »

Here is the loudest cannon from the 1812 overture. I added 1/10th a second of a 20hz sine at 0dB before the cut for reference.

dave
Attachments
The dynamic loadline with the 20hz FS reference.
The dynamic loadline with the 20hz FS reference.
Picture 21.png (36.59 KiB) Viewed 12866 times
The signal over time. (20hz trimmed)
The signal over time. (20hz trimmed)
Picture 23.png (34.89 KiB) Viewed 12866 times
The full signal shoing the 20hz intro I added
The full signal shoing the 20hz intro I added
Picture 20.png (25.69 KiB) Viewed 12866 times
1812.wav
The .wav file of the loudest "cannon" from Erich Kunzel; Cincinnati Pops version of the 1812 overture.
(931.31 KiB) Downloaded 1018 times
The FFT of the signal with the 20hz sine trimmed.
The FFT of the signal with the 20hz sine trimmed.
Picture 22.png (27.14 KiB) Viewed 12877 times
Last edited by dave slagle on Fri Jul 17, 2009 10:44 pm, edited 3 times in total.
dave slagle
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Joined: Sat Jan 22, 2005 3:54 am
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Rollerball

Post by dave slagle »

aka the organ from Bach; Tocatta And Fugue In D Minor
Attachments
the FFT of the music without the intro tones
the FFT of the music without the intro tones
Picture 32.png (26.73 KiB) Viewed 12850 times
the music portion.
the music portion.
Picture 31.png (34.29 KiB) Viewed 12850 times
I added both a 20hz and 40hz intro to this.  You need ot look but all of the music fits well within the 40hz window.
I added both a 20hz and 40hz intro to this. You need ot look but all of the music fits well within the 40hz window.
Picture 30.png (40.13 KiB) Viewed 12855 times
the raw signal showing the 20hz and 40hz carrier.
the raw signal showing the 20hz and 40hz carrier.
Picture 29.png (28.08 KiB) Viewed 12855 times
rollerball.wav
Bach; Tocatta And Fugue In D Minor
(426.79 KiB) Downloaded 966 times
Andrew
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Joined: Wed Apr 26, 2006 8:06 am

Post by Andrew »

Impressive Dave, how do you get the final plots and can you elaborate on what we are seeing?

much appreciated.

-- Andrew
dave slagle
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Location: NYC
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Post by dave slagle »

Hey Andrew.

You can easily look at the loadline of any tube by simply plotting the current through it and setting the horizotal Axis in the plot pane to the voltage at the anode of the tube. In the example below the anode was labeled "ano" but you could just simply find the node number and use that.

The short story of what I am seeing thus far is that Partridge was right and that designing for max power at 50hz seems to be appropriate.

I threw out the challenge on AA and nobody came up with anything of merit so I guess i need to go into the longer story here. I simply added a few cycles of a 20hz sine to the beginning of the .wav to show the worst case scenario. In the case of the Bach I used 20hz and 40hz (at -3dB) and if you look at it, all of the music resides well within the width 40hz loop and the peaks extend beyond it. The tube is nominally biased at 60ma and the current envelope appears shifted upward which is a bit of a concern but the most important thing to me is that the concept that we need a billion henries to deal with the elliptical loadline may only apply for a 20hz sine wave and not for any type of music.

Getting back to the asymmetrical look, It would be very interesting to invert the phase and run it again, I'm not sure how to do this (lars?) but it may open up a fun new can of worms if what I expect to happen really happens.

Image

Also remember this was with an OT that only has 16hy's of inductance
Attachments
The device E is just an ideal voltage amplifier that Lars uses.
The device E is just an ideal voltage amplifier that Lars uses.
Picture 1.png (32.32 KiB) Viewed 12759 times
tube distortion loadline.asc
Here is the file... I use Steve's drop down models but you can delete and replace the 300B with your own. Put any .wav file in your LT spice folder and the name in the wavefile= "" to use it.
(2.38 KiB) Downloaded 445 times
Andrew
Posts: 201
Joined: Wed Apr 26, 2006 8:06 am

Post by Andrew »

Thanks, Dave, for the explanation, much appreciated. I have downloaded the model for play.

all the best,

-- Andrew
Suepemponge
Posts: 3
Joined: Tue Feb 21, 2012 5:09 pm

1 second wav files

Post by Suepemponge »

I have an app that came with my sound card from Creative Labs - cant remember the name of it right now - that I tested last night. It will let me record .wav files from my sound card.

Im not very savvy about recording music, but these files will be used in a Flash movie.

Anyone have any tips?
terry123
Posts: 3
Joined: Tue May 20, 2014 6:42 am

Post by terry123 »

In the case of the Bach I used 20hz and 40hz (at -3dB) and if you look at it, all of the music resides well within the width 40hz loop and the peaks extend beyond it.
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