HUG - here for all audio enthusiasts

Since its inception ten years ago, the Harbeth User Group's ambition has been to create a lasting knowledge archive. Knowledge is based on facts and observations. Knowledge is timeless. Knowledge is human independent and replicatable. However, we live in new world where thanks to social media, 'facts' have become flexible and personal. HUG operates in that real world.

HUG has two approaches to contributor's Posts. If you have, like us, a scientific mind and are curious about how the ear works, how it can lead us to make the right - and wrong - decisions, and about the technical ins and outs of audio equipment, how it's designed and what choices the designer makes, then the factual area of HUG is for you. The objective methods of comparing audio equipment under controlled conditions has been thoroughly examined here on HUG and elsewhere and can be easily understood and tried with negligible technical knowledge.

Alternatively, if you just like chatting about audio and subjectivity rules for you, then the Subjective Soundings sub-forum is you. If upon examination we think that Posts are better suited to one sub-forum than than the other, they will be redirected during Moderation, which is applied throughout the site.

Questions and Posts about, for example, 'does amplifier A sounds better than amplifier B' or 'which speaker stands or cables are best' are suitable for the Subjective Soundings area.

The Moderators' decision is final in all matters regarding what appears here. That said, very few Posts are rejected. HUG Moderation individually spell and layout checks Posts for clarity but due to the workload, Posts in the Subjective Soundings area, from Oct. 2016 will not be. We regret that but we are unable to accept Posts that present what we consider to be free advertising for products that Harbeth does not make.

That's it! Enjoy!

{Updated Nov. 2016A}
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Cleaning and repairing vinyl records

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  • Cleaning and repairing vinyl records

    We've mentioned here and here about the surface noise problems that bedevil vinyl LP records. If we record from the LP into a computer i.e. we digitise the record, we can attempt to restore and repair problems with the disc.

    First we need to capture the audio from the turntable. Here.

    Then we can attempt to remove some of the defects of the vinyl disc. Here. You can see how a digital recording of an analogue LP has enough resolution so that even the clicks are well coded here. Zoomed-in, there are 44000 sample spots every second in a CD digital recording and these can be manipulated in a suitable audio editing program. Clicks can literally be painted out.

    Remember! Every time we remove defects (clicks, scratches etc.) we remove some musical detail. But if that musical detail is anyway obscured by surface noise then it has gone anyway. And gone means gone. Irrecoverable. All we can do is disguise the limitation of the gramophone record, not turn it magically into a super wide-band, pristine, high dynamic range CD digital recording. That would be impossible. We can't put back what is simple not there and never was.
    Alan A. Shaw
    Designer, owner
    Harbeth Audio UK

  • #2
    Digital Audio Editor - Magix Audio Cleaning Lab

    I received a mail shot yesterday from Magix, a German software company. As Magix have recently acquired the excellent Sony Vegas video editing source code and will now be the develeopers, my awareness of the Magix brand has increased.

    Magix Audio Cleaning Lab is on offer for the next few days at under half of its list price. Promo video here. Feature set here.

    The tools look like a modern super-set of Adobe Audition (3) at a fraction of the price, and Win10 compatible. I bought it. The facilities to clean-up and manipulate audio (including the Exciter 'which no audiophile should be without') are impressive. The license can be moved from PC to PC.

    It fits with my thinking that one thing we could do at the end of the day (or even off-site in the early evening) at the Bristol hifi show next February, is a simple hands-on audio "masterclass" (sounds ridiculously grand, but I can't think of a better name) where it's possible to demonstrate how the ear finds certain manipulation from 'flat' rather attractive. We see evidence time after time that listeners do not appreciate that as the ear is a level/frequency sensitive organ, the very first step in making valid comparisons is to be sure that level and frequency are being compared like for like, and if not, the sort of tricks the ear will play on the listener.
    Alan A. Shaw
    Designer, owner
    Harbeth Audio UK


    • #3

      Is it better than Audacity, in functionality or ease of use?