Well. I am used to the commersial world of hi fi and other things. It is time to leave as I feel I have nothing positive to offer. I came here when Parkingson's was taking over my life. It was a wrong diagnosis. I now walk on water in my spirit and even put my leg over a BMW 1200 motorcycle today ( want a R100 or 80 even though it a bad handling bike ). I have more work than I should bother with so it is now time to stop pestering people here and get on with life. BTW I loved every moment and have no regrets, I loved the banter as usually people give me too much respect. I learnt buckets from you Pano and the speakers really work. I did 100 % what you said and I changed only small details ( phase plug and fancy baffle, if I hadn't tried your ideas it would have failed ). You are one I will miss. I will follow and won't refuse a tunrntable question. I was once told I was the world expert on disc reproduction. Colleen says she would think that's true although not about making it work where I am just a listener. The comment was something I overheard. I am the worlds greatest believer no doubt. Anyway I truely love this place although I seldom agree with a word that's said here when said by those I suspect have very little depth of understanding ( Douglas is time served and 100 % right in his analysis, He never tells half truths and writes in text book English unlike me ). My depth if it exists comes of repairing things mostly. I had 23 years of that as jobs were not easy to find ( Harold Wilson's time ). When settled I loved the work, I realised that's what I was going to do for many years. My boss died and I moved on to what my qualifications were able to give me. Video including U-matic also. I play the fool and listen hard.
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I rarely play vinyl anymore though I still have every vinyl album I ever bought. I cherish them all and enjoy spinning them occasionally. I moved to CD's when they first came out and have not bought vinyl since.
Still, this topic intrigues me.
I just finished reading Douglas Self's article "The Devinyliser" in the latest edition of Linear Audio. As with all of his writings I learn from his test by test, step by step, from beginning to end explanation resulting in a practical circuit that could be implemented into a hobby built system. In this case a phono pre-amplifier.
That is where my question falls.
From post #769:
Where would I insert this circuit into a phono pre-amplifier such as his Elektor 2012 MC/MM system? I don't see a need for a subsonic filter if this Devinyliser circuit is implemented.. So, could I insert this in in place of the subsonic filter before the gain stage? Or would this be best after the gain stage?
Still, this topic intrigues me.
I just finished reading Douglas Self's article "The Devinyliser" in the latest edition of Linear Audio. As with all of his writings I learn from his test by test, step by step, from beginning to end explanation resulting in a practical circuit that could be implemented into a hobby built system. In this case a phono pre-amplifier.
That is where my question falls.
From post #769:
Where would I insert this circuit into a phono pre-amplifier such as his Elektor 2012 MC/MM system? I don't see a need for a subsonic filter if this Devinyliser circuit is implemented.. So, could I insert this in in place of the subsonic filter before the gain stage? Or would this be best after the gain stage?
Although I haven't a turntable I still find all this interesting, mainly because it adds an element of subjectivity into the proceedings.
My only memories of rumble were of my parents B&O music centre which sported a pretty decent turntable, and I remember being fascinated with seeing the speaker cones flap inaudibly, particularly as I turned the volume and bass up in the quiet bits.
So that is my memory of it all, and its purely visual really. With that in mind I thought I would create two separate LF noise tracks, one for left channel and one for right and then add some music... yes I know its all been done before but I wanted to try it. I don't know how realistic my added rumble is, and I'll tell you how I created it later. The track I choose to add this to is a very early CD release that was criticized at the time for its very low level. It is what it is though and imo makes a perfect test track.
Its pretty obvious which has the added rumble by viewing the image below. Whether the amplitude I set the rumble at is in any way realistic I don't know, as I say, my memory is visual for this but the cone movement looks in the right ball park.
See what you think from a subjective view point. Here is a zipped file of both clean and added rumble. The file is on Dropbox. You do NOT need to install anything to get this. Just decline any offered invitation and select only the file.
Rumble Test
My only memories of rumble were of my parents B&O music centre which sported a pretty decent turntable, and I remember being fascinated with seeing the speaker cones flap inaudibly, particularly as I turned the volume and bass up in the quiet bits.
So that is my memory of it all, and its purely visual really. With that in mind I thought I would create two separate LF noise tracks, one for left channel and one for right and then add some music... yes I know its all been done before but I wanted to try it. I don't know how realistic my added rumble is, and I'll tell you how I created it later. The track I choose to add this to is a very early CD release that was criticized at the time for its very low level. It is what it is though and imo makes a perfect test track.
Its pretty obvious which has the added rumble by viewing the image below. Whether the amplitude I set the rumble at is in any way realistic I don't know, as I say, my memory is visual for this but the cone movement looks in the right ball park.
See what you think from a subjective view point. Here is a zipped file of both clean and added rumble. The file is on Dropbox. You do NOT need to install anything to get this. Just decline any offered invitation and select only the file.
Rumble Test
Big difference listening to hdtracks.com old albums like black sabbath and some new 2000´ (coldplay). Amount of (eq) difference is unbelievable.
This is same tech, same provider. I wonder what to expect from vinyl in person.😀
How come? Is it just because the new era rec. engineers are deaf, loudness war morons?
This is same tech, same provider. I wonder what to expect from vinyl in person.😀
How come? Is it just because the new era rec. engineers are deaf, loudness war morons?
I still have some half-finished boards for Bob Cordell's VinylTrak design, maybe I can insert it in that one.
Really have to finish it...
Jan
What about a Sakumizer ( or De-Sakumizer ) filter/plugin?
An externally hosted image should be here but it was not working when we last tested it.
It is not a response nor a post, simply my current signature ( and avatar... ).😛
Don't worry, i change these every now and then...
If you're handicapped you probably prefer to take a ramp to stairs. My ears aren't perfect, I'll take the ramp!
Looks to me like this thread has rumbled off into the distance 😉
(did anyone give the track I created a listen, or was it a waste of time ? Its a few posts above this one)
(did anyone give the track I created a listen, or was it a waste of time ? Its a few posts above this one)
i bet lot of people did. i did over headphones, and did not hear any difference but dont have any kind of golden ears so i better say nothing.
I did the test, but the quality of the recording in MP3 was rather mediocre.
Adding the rumble did only result in annoying, well .... extra rumble.
I´m sorry, but I could not come to any conclusions with this material, although the idea behind it was quite interesting.
Hans
@Mooly. I tried your test. I only used headphones connected to my laptop. I could only hear some difference in the first few seconds. After that they sounded pretty much the same.
But thanks, it was a great exercise.
But thanks, it was a great exercise.
Thanks for giving it whirl anyway Hans. I was really interested in whether the added LF altered the subjective impression, whether for better or worse. It sounds like you heard it as just unwanted rumble.
(as I mentioned earlier, I've no idea how the spectrum/amplitude of my artificial rumble would compare to the real thing... I was going mainly of perceived visual cone movement)
Thanks Dennis. Headphones might not reveal much I suspect, or at least not until the level is turned up such that audible non linearity's occur. Possibly very headphone dependent.
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