Finding clicks
 

On 16/09/2014 18:38, TonyL wrote:
Here is a link:
https://www.adobe.com/cfusion/entitl...=cs2_downloads

As far as I can tell this is a legitimate offer of 'obsolete' software
by Adobe. I understand that Audition 3 is part of cs2. There is also an
old version of Photoshop available on that page. Serial numbers are
included on the page.

They've now changed the rules, so you need a valid Adobe ID before you
can sign in and reach the download page. They've noticed how many people
were downloading the programs, which, officially, are not compatible
with any OS later than XP, anyway.

The offer was officially only to let people with a licence to download
and re-install their paid for software following the switching off of
the authentication server.

--
Tciao for Now!

John.

Finding clicks
 

In article op.xmae0omdg15l5m@jamesm6700, James Perrett
wrote:
On Mon, 08 Sep 2014 03:16:03 +0100, Johny B Good
wrote:

On Sun, 07 Sep 2014 16:44:21 +0100, Jim Lesurf
wrote:
[big snip]

I've skimmed through this thread and my first impression is that most of
the developments in the past 15 years seems to have gone by unnoticed.
One of the fastest ways to find clicks is to look in the frequency
domain (which is what Jim seems to be doing)

Not quite. I've been looking at using differentiation. That does of course
'slope' the frequency response to emphasise HF and reduce the impact of LF.
So is aiming at the same kind of distinction as...

but the newer versions of Audition include a frequency/time view as
standard so the worst of the clicks are obvious.

That's a nice idea. I'd thought of it but it would involve far more in the
way of programming from my DIY POV. FWIW I've also been wondering about a
way to 'plug in' to Audacity some method like this. But I don't know enough
about Audacity as I've only really been using it recently. I've also
wondered about having Audacity show added tracks which are the
differentials to make the process easier.

I have the impression that the software you suggested, though, isn't for
Linux and isn't open source. So isn't particularly attractive for me. As
much as anything I'm wondering about this from the POV of examining results
versus method in detail.

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

Finding clicks
 

In message , Jim Lesurf
writes
In article op.xmae0omdg15l5m@jamesm6700, James Perrett
wrote:
On Mon, 08 Sep 2014 03:16:03 +0100, Johny B Good
wrote:

On Sun, 07 Sep 2014 16:44:21 +0100, Jim Lesurf
wrote:
[big snip]

I've skimmed through this thread and my first impression is that most of
the developments in the past 15 years seems to have gone by unnoticed.
One of the fastest ways to find clicks is to look in the frequency
domain (which is what Jim seems to be doing)

Not quite. I've been looking at using differentiation. That does of course
'slope' the frequency response to emphasise HF and reduce the impact of LF.
So is aiming at the same kind of distinction as...

but the newer versions of Audition include a frequency/time view as
standard so the worst of the clicks are obvious.

That's a nice idea. I'd thought of it but it would involve far more in the
way of programming from my DIY POV. FWIW I've also been wondering about a
way to 'plug in' to Audacity some method like this. But I don't know enough
about Audacity as I've only really been using it recently. I've also
wondered about having Audacity show added tracks which are the
differentials to make the process easier.

I have the impression that the software you suggested, though, isn't for
Linux and isn't open source. So isn't particularly attractive for me. As
much as anything I'm wondering about this from the POV of examining results
versus method in detail.

I'm no expert, but I would have thought that you need a program which
would look at (say) 7kHz for clicks, and note the times when they
occurred. It would then replay and re-record the audio, using the timing
information to blank out the clicks from just before they occurred to
just after. A refinement would be to take a sample of the audio at just
before and just after a click, average it, and use it to fill in the
blanked-out bit. Is this the sort of thing that is done?

--
Ian

Finding clicks
 

On Wed, 17 Sep 2014 09:46:24 +0100, Jim Lesurf
wrote:

I have the impression that the software you suggested, though, isn't for
Linux and isn't open source. So isn't particularly attractive for me. As
much as anything I'm wondering about this from the POV of examining
results
versus method in detail.


No - they're not open source but I'm not aware of anything that is
anywhere close to that standard that is open source. There's still plenty
of money to be made creating decent restoration software and, if you want
to work at that level, you'll probably spend years developing your system.

If you want a few shortcuts then I'd spend a little time checking out the
libraries at

http://www.cockos.com/wdl/

Cheers,

James.

--
JRP Music - http://www.jrpmusic.co.uk

Finding clicks
 

In article ,
Ian Jackson wrote:


I'm no expert, but I would have thought that you need a program which
would look at (say) 7kHz for clicks, and note the times when they
occurred. It would then replay and re-record the audio, using the timing
information to blank out the clicks from just before they occurred to
just after. A refinement would be to take a sample of the audio at just
before and just after a click, average it, and use it to fill in the
blanked-out bit. Is this the sort of thing that is done?

FWIW This morning I've been experimenting with the following lateral
thinking approach...

1) Use sox to generate a version which is highpass filtered e.g.

sox infile.wav outfile.wav highpass 5000

This creates a new file which has had a 2nd order highpass filter applied
with its turnover at 5kHz.

2) Load both the infile and the outfile versions into Audacity. So I can
see the top two tracks as the infile (orginal to be edited) and the bottom
two as the outfile (filtered to reduce the music and make clicks easier to
spot).

This seems to work fairly well and lets me see many clicks which otherwise
are hard to see in the original unless I already know where to look. So may
well be a useful way of quickly marking places to focus my attention upon.

What I'm not yet clear on is that I'm still learning about Audacity! So,
for example, I need to take care that I edit and save the original
*without* doing something daft like adding in the highpassed file when
exporting the results - thus putting the clicks back *and* adding a
shelved-up treble above 5kHz! 8-]

I *think* it is OK to 'solo' the infile I'm editing and 'mute' the filtered
one I'm using to see clicks more clearly. But I've only briefly exprimented
so far. Hence if anyone more used to Audacity can comment I'd be
interested.

Since the sox highpass is 2nd order it does approximate here to doing the
second differential on the portion of the signal below about 5kHz. I may
try a higher frequency for the filter to get closer to 2nd diff and/or
having sox apply some gain to keep the results big enough to easily see!

Slainte,

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

Finding clicks
 

In article op.xmbz88l7g15l5m@jamesm6700, James Perrett
wrote:
On Wed, 17 Sep 2014 09:46:24 +0100, Jim Lesurf
wrote:

I have the impression that the software you suggested, though, isn't
for Linux and isn't open source. So isn't particularly attractive for
me. As much as anything I'm wondering about this from the POV of
examining results versus method in detail.


No - they're not open source but I'm not aware of anything that is
anywhere close to that standard that is open source. There's still
plenty of money to be made creating decent restoration software and,
if you want to work at that level, you'll probably spend years
developing your system.


Yes, I'm sure that's correct, particularly if I wanted to produce something
that *reliably* automated the bulk of the process! And I doubt I could beat
the serious pro products.

However I'm really just trying to find a way to make it easier to 'flag'
the positions of most clicks sufficiently reliably to speed up dealing with
the 'by hand'. This is partly because I don't trust highly automated
correction. Partly because I'm just wanting to save some time for some rare
cases. Hopefully in the process helping others who occasionally want to do
this kind of thing in a similar way.

If you want a few shortcuts then I'd spend a little time checking out
the libraries at

http://www.cockos.com/wdl/

Ta! I'll have a look.

Slainte,

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

Finding clicks
 

On Tue, 16 Sep 2014 19:14:16 +0100, John Williamson
wrote:

On 16/09/2014 18:38, TonyL wrote:
Here is a link:
https://www.adobe.com/cfusion/entitl...=cs2_downloads

As far as I can tell this is a legitimate offer of 'obsolete' software
by Adobe. I understand that Audition 3 is part of cs2. There is also an
old version of Photoshop available on that page. Serial numbers are
included on the page.

They've now changed the rules, so you need a valid Adobe ID before you
can sign in and reach the download page. They've noticed how many people
were downloading the programs, which, officially, are not compatible
with any OS later than XP, anyway.

The offer was officially only to let people with a licence to download
and re-install their paid for software following the switching off of
the authentication server.

I've just tried this and got through. I had to give my name and
address to register wth the site, but I was then allowed to the
download page. I then had to click 'Accept' on a popup that said they
had disabled their activation server for CS2 products. However I was
able to download and install Audition and Photoshop to my XP system.
In the Terms & Conditions it said that Activation was required after
30 days, so I experimentally added two months to my PC's date, but
Audition still worked. In fact the 'Activation' menu bar item is
greyed out.
--
Dave W

Finding clicks
 

On 18/09/2014 12:11, Dave W wrote:
On Tue, 16 Sep 2014 19:14:16 +0100, John Williamson
wrote:

On 16/09/2014 18:38, TonyL wrote:
Here is a link:
https://www.adobe.com/cfusion/entitl...=cs2_downloads

As far as I can tell this is a legitimate offer of 'obsolete' software
by Adobe. I understand that Audition 3 is part of cs2. There is also an
old version of Photoshop available on that page. Serial numbers are
included on the page.
They've now changed the rules, so you need a valid Adobe ID before you
can sign in and reach the download page. They've noticed how many people
were downloading the programs, which, officially, are not compatible
with any OS later than XP, anyway.

The offer was officially only to let people with a licence to download
and re-install their paid for software following the switching off of
the authentication server.
I've just tried this and got through. I had to give my name and
address to register wth the site, but I was then allowed to the
download page. I then had to click 'Accept' on a popup that said they
had disabled their activation server for CS2 products. However I was
able to download and install Audition and Photoshop to my XP system.
In the Terms & Conditions it said that Activation was required after
30 days, so I experimentally added two months to my PC's date, but
Audition still worked. In fact the 'Activation' menu bar item is
greyed out.

I did same and discovered that Audition+Photoshop work fine under Win 7.
Also people are reporting that they work with Win 8.1 Kudos to Microsoft
for maintaining backward compatibility. Like you, I was quite open in
submitting my real physical and email addresses as I think that Adobe
have demonstrated by their actions that they are happy for the public to
download these 'legacy' programs. FYI, I believe that it is possible to
link directly to the download page but I decided to follow the procedure
that Adobe have set up.