It's my fault, I should have specified that I'm using 1.3.9 (beta).
It's available here:
Download Audacity from SourceForge.net
On earlier versions, the Import option was on a different tab. They also did not allow setting the frequency range of the spectrogram.
In many cases, the "beta" version of a product is best avoided as it may be slow (debugging code) and crash-prone. But in my experience the beta versions of Audacity are reliable. The "beta" designation is there mainly because features and UI design may change without notice.
I notice the latest beta is 1.3.12 - when I have time, I'll try it out.
computer use
There are various CD titles listed in this thread. Copy and paste the interesting posts to a text file. The CD's have colored text in most cases, or a cover picture. Right click the picture or CD name, pick "copy link location", paste the location next to the title or picture in you text file. You will have to cut and paste the holtz album cover image separately to your text directory. There. Some CD's the title only was listed. Purchase information is available for most CD's on Amazon.com or through google to vendors on other continents or vendors with different terms or stock. Good luck.
There are various CD titles listed in this thread. Copy and paste the interesting posts to a text file. The CD's have colored text in most cases, or a cover picture. Right click the picture or CD name, pick "copy link location", paste the location next to the title or picture in you text file. You will have to cut and paste the holtz album cover image separately to your text directory. There. Some CD's the title only was listed. Purchase information is available for most CD's on Amazon.com or through google to vendors on other continents or vendors with different terms or stock. Good luck.
Back to the chat about what is on recordings, I've reported some SPL and bottom-end Hz-stuff for the Toronto Samba Squad (both live at an open-air festival two blocks from home and on CD) as well as everybody's hero, Gustavo Dudamel and the H.I.S. Orchestra* (that's an old Stokowski joke).
Here
*Simon Bolivar Absolutely Incredible Youth Band
Here
*Simon Bolivar Absolutely Incredible Youth Band
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With a real-time spectrum analyzer (like the limb-along but free MacCRO X or Windows equivalent), you just play the music, set the chart to 10-110 Hz, 2.6 Hz sampling, and watch the dancing line on the screen. Clear as day.
Ask Google for freeware oscilloscope.
William,
I assume you mean the section where the bass comes in just after 3min 15 sec. It slides up to a long, repeated note just before the verse begins "Sail on silver bird...". It's a 78 hz note, with a second harmonic about 6 db lower.
On my version, it peaks about 24 dB below full scale, although the whole track is low level and peaks about - 6dB at the final crescendo. It was ripped from an old CD, not a "remaster" which are often compressed to make the levels higher.
See the attached images.
The first one is the relevant section of the track, starting with the piano, followed by the bass notes, and the verse coming in at the right.
The section of bass "highlighted" (shaded in darker grey) in the display is analysed and displayed in the second image. You can see the very sharp peak at 78 Hz and the second harmonic at about 155 Hz, with additional harmonics above that.
Regards...
Attachments
I've been watching my recordings.
post #40.
About the Murray/Ruffatti recording, yes some 20 Hz stuff. Dunno if it is just limitations of my system, but some profound bass runs aren't the lowest. In Band 1, 20 Hz shows up a few times (3:02, 3:30, 4:50-end). Some 18 Hz in Band 8 near end. On Band 8, some 15 Hz around 3:15.
The Telarc/Cincinatti 1812 may be a "digital cannon" and mostly 32 Hz (same as the big side drum there) but also rumblings down to 10.
The Kodo Drummers ("Heartbeat of Drummers of Japan") has a band called "Big Drum." Loud and resonant but no content below 43.
I'm thinking about sub'ing my Klipsch in order to bring up the 18-40 octave. Not much content down there, but.... Anybody think I should?
Some day...these will be mine 
http://www.passdiy.com/pdf/el-pipe-o.pdf
Now that there's a lot more long-stroke 21" drivers available, should kick some serious butt...
http://www.passdiy.com/pdf/el-pipe-o.pdf
Now that there's a lot more long-stroke 21" drivers available, should kick some serious butt...
William,
The oscilloscope display does illustrate the fundamental and harmonics quite well. I do have a couple of comments: First, note that the display is "jagged". That is, there are relatively few sample points across the display. This implies a relatively low resolution - there may be narrow peaks that are missed because they don't correspond to a frequency where a level measurement was made. Second, the display is in linear frequency mode. Setting it to "log" mode, if possible, would expand the range from 0 to 100 Hz or so which is the area of interest in this case. It would occupy more of the screen instead of being squashed into the left hand side.
I notice you put your screen shots into Word documents. That can make it difficult for people with non-Microsoft systems to see them. It's just as easy to make "proper" images of them, using just the standard system tools:
1. Click on the window of interest, to make sure it has the "focus".
2. Press Alt-PrintScreen. This should capture the current window to the clipboard.
3. Open Paint (usually Start --> Accessories --> Paint).
4. Paste (Ctrl-V) the clipboard image into Paint.
5. Edit (crop or resize) if required.
6. File --> Save As... and name it. Select the "Save as type..." to suit the image being saved. PNG is good for graphic-type screen shots like the oscilloscope. JPG is often better for photographs or any image with smooth color graduations.
Regards,
Don.
The oscilloscope display does illustrate the fundamental and harmonics quite well. I do have a couple of comments: First, note that the display is "jagged". That is, there are relatively few sample points across the display. This implies a relatively low resolution - there may be narrow peaks that are missed because they don't correspond to a frequency where a level measurement was made. Second, the display is in linear frequency mode. Setting it to "log" mode, if possible, would expand the range from 0 to 100 Hz or so which is the area of interest in this case. It would occupy more of the screen instead of being squashed into the left hand side.
I notice you put your screen shots into Word documents. That can make it difficult for people with non-Microsoft systems to see them. It's just as easy to make "proper" images of them, using just the standard system tools:
1. Click on the window of interest, to make sure it has the "focus".
2. Press Alt-PrintScreen. This should capture the current window to the clipboard.
3. Open Paint (usually Start --> Accessories --> Paint).
4. Paste (Ctrl-V) the clipboard image into Paint.
5. Edit (crop or resize) if required.
6. File --> Save As... and name it. Select the "Save as type..." to suit the image being saved. PNG is good for graphic-type screen shots like the oscilloscope. JPG is often better for photographs or any image with smooth color graduations.
Regards,
Don.
Familiar with ArmorAll over in the automobile department at Walmart? Great spritzer for adding life and liveliness to rubber stuff.*
For old electric cords, it can bring back the dead.
*I am sure somebody will post that it is just a combination of kerosene and lanolin or maybe WD40 and cottage cheese or something. Might well be and wish I knew how to make it. Works great but a no-no on bike tires.
I just came off of a listening session with the FLH horn. I was listening to Jean Guillou's Pictures at an Exhibition on Dorian. I almost fell off of my chair! There is a 53 db dynamic range from the quietest track ( 3 ) to the loudest tracks ( 14,15) Bass peaked out at about 104 db. That's measured on my old Rat shack meter. Decently accurate once you get the calibration curve worked in.
I set the level so that on track three the swell box used by Guillou which is fully closed is audible but not very loud. A level that I have heard many times in person on different organs. So from that quiet little track to the full roar of them there pipes is something to listen to.
I'm going to go and check out John Balka's Vierne's Wesminster chimes and see what's what with that CD. It's fun when all are gone. I can shake ratttle and roll with impunity!
Mark
I set the level so that on track three the swell box used by Guillou which is fully closed is audible but not very loud. A level that I have heard many times in person on different organs. So from that quiet little track to the full roar of them there pipes is something to listen to.
I'm going to go and check out John Balka's Vierne's Wesminster chimes and see what's what with that CD. It's fun when all are gone. I can shake ratttle and roll with impunity!
Mark
I forgot to post this link for checking your hearing.
It's pretty cool. I'm reasonably falt until 16khz where I know I'm off the deep end. I'm still good to 14.5 khz but that's not available on this test.
Equal loudness contours and audiometry - Test your own hearing
I present my golden ears as the first submission. At least I think they are golden. Only set I've ever listened to!
Mark
It's pretty cool. I'm reasonably falt until 16khz where I know I'm off the deep end. I'm still good to 14.5 khz but that's not available on this test.
Equal loudness contours and audiometry - Test your own hearing
I present my golden ears as the first submission. At least I think they are golden. Only set I've ever listened to!
Mark
Attachments
Holst the Planets by Peter Sykes on Raven Recordings. I'm still listening to this baby. Saturn started out at 59 db and peaked near the end at 109 db. So still some serious dynamic range. I kept the multimeter at peak hold a peaked out 15.9 volts AC 31.6 watts at peak. I just plugged the numbers into Hornresp at it is spot on for the input level.
Gotta check out some Bach.
Mark
Gotta check out some Bach.
Mark
A bit oh show and tell.
The make shift setup. It works. The speakers are ones I made when I was 13. I'll admit to my Dad helping me away back then. They have been updated quite a bit since then. Actually completely. But the cabinets are original. The monolith is the FLH TRIO12. It is firing up towards the ceiling about 3 feet away from it. I've been suffering listening to Bach by Guillou. I will enjoy this evening to be sure.
One thing that is most interesting as a decending scale is being played on the pipe organ there is a slight loss in SPL. But it is not as much as one might think. Going down an octave on the last part of Bach Piece d'Orgue the level drops by about 10 db but stays rather constant in the last notes of the octave. With a good subwoofer you get the rise and droop of the bass wave. And it has texture that is rather intoxicating. No one note bass but palpable differences in tone colour. Anyway back to some more Bach. I think I go from Paris to Saint-Maximin la Sainte Baume to listen to Bcch on a nasty french clasical organ.http://www.google.ca/url?sa=t&sourc...sg=AFQjCNHzuS54SapWVYJgkD9TpuDIRpt_dQ&cad=rja
Mark
The make shift setup. It works. The speakers are ones I made when I was 13. I'll admit to my Dad helping me away back then. They have been updated quite a bit since then. Actually completely. But the cabinets are original. The monolith is the FLH TRIO12. It is firing up towards the ceiling about 3 feet away from it. I've been suffering listening to Bach by Guillou. I will enjoy this evening to be sure.
One thing that is most interesting as a decending scale is being played on the pipe organ there is a slight loss in SPL. But it is not as much as one might think. Going down an octave on the last part of Bach Piece d'Orgue the level drops by about 10 db but stays rather constant in the last notes of the octave. With a good subwoofer you get the rise and droop of the bass wave. And it has texture that is rather intoxicating. No one note bass but palpable differences in tone colour. Anyway back to some more Bach. I think I go from Paris to Saint-Maximin la Sainte Baume to listen to Bcch on a nasty french clasical organ.http://www.google.ca/url?sa=t&sourc...sg=AFQjCNHzuS54SapWVYJgkD9TpuDIRpt_dQ&cad=rja
Mark
Attachments
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