Sign in to follow this  
Michael K.

Videoclips from the Ole Bull delGesu project

Recommended Posts

Can anyone guess what I am doing to this stuff?

Comparing like music clips between instruments based on compressed audio, and starting another acoustics thread that Einstein couldn't solve? :)

Or perhaps you're just enjoying the music? :)

Share this post


Link to post
Share on other sites
They could've found a better player, ya think?

He had to play the same lines over and over on different instruments. I think that he did a fine job. What a mind-numbing task.

Share this post


Link to post
Share on other sites

There are photos of all the violins that made it to Oslo on Christophe Landon's website via the link below. Many thanks to all the good people who gave their time for the project and to make the images and video available. Having missed going to Oslo because of the volcano ash cloud I must say I am very grateful to at least see and hear all these wonderful instuments in this way.

http://www.landon-violins.com/olebull/index.html

Share this post


Link to post
Share on other sites
There are photos of all the violins that made it to Oslo on Christophe Landon's website via the link below. Many thanks to all the good people who gave their time for the project and to make the images and video available. Having missed going to Oslo because of the volcano ash cloud I must say I am very grateful to at least see and hear all these wonderful instuments in this way.

http://www.landon-violins.com/olebull/index.html

Thanks for bringing this to our attention. I, too, enjoyed hearing all the instruments, including yours!

Share this post


Link to post
Share on other sites

Uh oh, my violin is on Landon's web site and it's not even an Ole Bull copy! I came with a couple violins just because, and Roman Malamant was kind enough to photograph one of them for me. It wasn't meant to be included with the others. I hope that nobody takes offence. :)

It was great to see all the instruments though! All those interpretations made me wonder what the original looks like. I had a good time.

Share this post


Link to post
Share on other sites

Thanks to Melvin, Michael, and everyone who entered their violins. It looks like it was a success, other than that nasty volcanic ash cloud thing. I've listened to most of the violins, I used head phones, it helped with clarity. Melvin, Michael, and other MN'ers (hard to make out some of the names), very impressive. Any other MN people let us know what number and the time on the recording they have your instrument.

Share this post


Link to post
Share on other sites

As some of you may know some of us were present at the recording and listening session at the Norwegian Academy of Music. We had a score sheet we filled in for each violin and the average scores from 20 of us is calculated and presented at the facebook site: http://www.facebook.com/home.php?#!/ph...p;id=1036030258

As there are recordings available and the scores also are published (you also find the average scores for each category, power, balance, colour, clarity, warmth and total score at the same site), we can look for any traits in e.g spectra that may be favourable and not.

Share this post


Link to post
Share on other sites
Uh oh, my violin is on Landon's web site and it's not even an Ole Bull copy! I came with a couple violins just because, and Roman Malamant was kind enough to photograph one of them for me. It wasn't meant to be included with the others. I hope that nobody takes offence. :)

It was great to see all the instruments though! All those interpretations made me wonder what the original looks like. I had a good time.

Hi Torbjorn!

Probably I shouldn't have given those to Christophe, but I thought he would be interested to have all the photos I made there. I guess you can ask him to remove your violin from the list.

By the way, if someone interested to get full size photos of your violin from the exhibition, just send me a message. And by the way it was really fun to see all these instruments! Great job guys.

Share this post


Link to post
Share on other sites

I have extracted wav sound files from the videos and run them trough a sound analysis program that can do long time average 1/3rd octave band analysis. I enclose the plot of all the 52 spectra. There is one Ole Bull del Gesu viola in the set, but the other are violins. The spread is some 5-10dB or so.

I have also plotted the average scores from the listening assessments into a spreadsheet and made correlation matrixes between the levels of the 1/3rd octave band spectra and the average scores. You see from the figure that the listeners has sort of judged all factors somewhat similar for the lower part of the spectra up to about 2kHz. The coloured curves follow each other quite closely from the 500Hz band up to about 2kHz.

The most important information to gather from this, I think, is that the low frequency response from some 315-500Hz is stronger and the 630Hz band is weaker in the higher judged instruments. There is also a slight tendency for high 2.5 and 3.15kHz band levels and a low 2kHz band level being beneficial, but the tendency is weak. Also the levels from 4kHz -10kHz tends to be weaker in the violins judged to be sounding warmer.

I think a strong 400Hz band is also a typical trait of the original Ole Bull del Gesu violin.

Finally I show the correlations between the average scores and the Dünnwald parameters + the overall sound pressure level (SPL) extracted from the spectra. Some of you may not be familiar with Dünnwalds L, ACD-B and DE-F parameters. I have explained these some times before here on MN but I give a brief recapitualtion here:

- The L value measures the level difference between the main air resonace band 250Hz or 315Hz and the highest peak in the range from 630Hz-1.1kHz.

- The ACD-B is the level of the regions A (190Hz-630Hz) C (1,6-1,8kHz) and D (1,8-2,8kHz) minus the B region (650Hz-1.3kHz)

- The DE-F is the level of the regions D (1,8-2,8kHz) and E (2.8-4.2kHz) minus the region F (4.2-7kHz).

To me it is interesting to see that the L and ACD-B correlate with the overall quality, while the DE-F and overall sound pressure level does not come out with clear correlations. The sum of the parameters also correlate highly with the overall scores. I think this may support my idea of using these parameters on the spectra and combining them in a sum.

I will return with some simpler comparative spectra in the following.

post-25136-1273920244.jpg

post-25136-1273920253.jpg

post-25136-1273920263.jpg

Share this post


Link to post
Share on other sites
There are photos of all the violins that made it to Oslo on Christophe Landon's website via the link below. Many thanks to all the good people who gave their time for the project and to make the images and video available. Having missed going to Oslo because of the volcano ash cloud I must say I am very grateful to at least see and hear all these wonderful instuments in this way.

http://www.landon-violins.com/olebull/index.html

By the way, it would have been nice to see my name mentioned on Christophe's website since I made all the photos at the exhibition... I am not connected to the exhibition in any way and I took the initiative of making the photos because I thought it would be pity not to have a record of these great instruments.

Share this post


Link to post
Share on other sites

Here are the average long time average spectra of the three instruments with the highest and lowest scores on each of the asessment parameters. I start with the summed scores and then each individual. They look somewhat similar. Some of the same violins are on these extremes for all parameters, but I haven't checked that in detail..

As I pointed out in the former tread there is a tendency for giving high scores on the other parameters if one is set high and vice versa.

post-25136-1273923775.jpg

post-25136-1273923785.jpg

post-25136-1273923792.jpg

post-25136-1273923800.jpg

post-25136-1273923807.jpg

post-25136-1273924026.jpg

Share this post


Link to post
Share on other sites
Hey Roman, you did a great job with the photography. I watched all the work you put in to it, and you really deserve the credit. The photos are great. It was nice to meet you.

Thanks Torbjorn!

It was an interesting experience - I have never had to photograph as much as 52 violins in a row. I wouldn't be able to do it in that short time without help of the friends by the way. I need to thank for assistance in photography Dimitri Atanassov and Fernando Lima. It was nice to meet you guys (and others) and I enjoyed every second of it.

Share this post


Link to post
Share on other sites
Here are the average long time average spectra of the three instruments with the highest and lowest scores on each of the asessment parameters.

Anders,

The differences in mid-range frequency response is noteworthy. Perhaps all it takes is for proportion to be a little bit 'off' ...

Thanks,

Jim

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

  • Recently Browsing   0 members

    No registered users viewing this page.