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Pellicle
08-24-2007, 12:27 PM
I think dBpoweramp is the best CD ripper and conversion utility out there. The reference edition with the multi-CPU support is a great time saver when ripping large libraries of CD's. Thanks for the excellent program.

One question - Some CD's have the upper frequency range emphasized. CD players typically will recognize this and during the DA process de-emphasize so the response on playback is flat. The information on whether the track is emphasized is on the CD and transports detect this and act accordingly.

With audio moving more and more to computer based and to alternative encoding formats ( I use FLAC) this information is lost and these CD's sound shrill when played.

As far as I can see dBpoweramp does not recognize this nor have the option to perform de-emphasis when ripping and transcoding.

Is there a way around this?

Are there plans to include such capability in the program. This would be a big draw for the digital audiophile community.

Spoon
08-25-2007, 04:54 AM
Pre-emp is not supported, the discs are very rare as far as I can tell.

petriburg
08-28-2007, 12:17 AM
In "The Compact Disc Handbook" (Ken C. Pohlmann; A-R Editions Inc.ISBN 0-89579-300-8) the author gives a very clear explanation of how emphasis is applied, and the frequencies affected. The indicator signal to "tell" the CD player whether or not to apply de-emphasis is contained in the Q Channel.
I agree with Spoon that emphasis is pretty rare in recent CDs, but may occurin older ones. The important point (to me, anyway) is that the CD player applies de-emphasis if it is required, ;) in response to the Q Channel signal, so it should certainly not affect audio ripped from a disc. Question? Do CD-DVD ROMs and 'burners' respond to the Q Channel signal - that would be the crux of the matter. Tony

tommyz
09-03-2007, 07:20 AM
This could be done using a DSP effect.

Is there an API for 3rd party developers?

LtData
09-03-2007, 02:17 PM
No, but you can utilize DirectX or VST plugins as a DSP effect in dMC.

Spoon
09-03-2007, 02:53 PM
The DSP effects are non-trivial to implement, how easy is pre-emp to implement?

tommyz
09-07-2007, 12:59 PM
De-Emphasizing is (normally) done using a passive network with a 50/15 us time constant.

This would have to bew implemented a IIR filter, as I have read elswhere a first order filter would get closer than 0.1 dB.

But I would have to look for the coeffs first...


ciao, TommyZ

tommyz
09-10-2007, 07:52 AM
This is a 101 coeff FIR filter that emulates the needed deemphasis.
Note that it is NOT symmetrical, as it also emulated the phase (although only to about 10 degrees). But the amplitude is within 0.1 dB up to 20 kHz
Where do I find info on implementing DirectX or VST plugins ?

101
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Porcus
04-21-2008, 12:04 PM
On what (lossless) file formats is a pre-emphasis tag/comment frequent enough to be interpreted during playback?

Spoon
04-25-2008, 04:29 AM
Pre-emph details never make it from the cd ripper to audio format.

--

Tommyz: sorry I did not see your post above, which language do you work in? c++

jagged_fish
02-03-2009, 01:16 PM
Track Technical is reporting that all of the tracks on the Japanese band Casiopea's 'Mint Jams' CD have pre-emphasis. None of their later discs seem to have it, so this might well be the only CD in my collection which is affected.

Are there any plans to implement a de-emphasis DSP?

Spoon
02-03-2009, 02:26 PM
Only if opportunity presents its self.

jagged_fish
02-10-2009, 10:19 AM
Does this constitute an opportunity?

http://www.picosound.de/E_soft.htm*emphasis

Spoon
02-10-2009, 02:08 PM
That has been around 5 years, has no source code, no visible license and no way of controlling externally, so no.

Porcus
02-12-2009, 01:55 PM
sox is GPL'ed and includes a de-emphasis filter. You don't even need to redistribute it if your "DSP" is merely a command line invoking sox, with a "please download and install sox version xxx" error message if it does not find it.

And, I'd still want a Vorbis comment saying PRE-EMPH: [Yes/Corrected/No]


sox: http://sourceforge.net/project/showfiles.php?group_id=10706

jh901
10-22-2009, 08:11 PM
has there been any movement on this issue?

these early Japanese CDs (several with 35DP- and CP35- catalog prefixes) are historically important, collectible, and in some cases have remarkable sound quality. is there a way to rip these into flac at this point? and, of course, with the properly adjusted eq for playback in, say, a Squeezebox system in the same way they would be heard on a CD player with the correct capability.

thanks!




Pre-emp is not supported, the discs are very rare as far as I can tell.

jh901
10-28-2009, 09:28 PM
bump- anyone?

EdBrady
10-29-2009, 01:34 AM
I've used sox for this purpose... works very well, though not as convenient as having the capability built into dMC. I only have 2 or 3 pre-emphasized CDs. I doubt if anybody is going to have more than a handful them, so it's really not too bad.

Rollo
12-25-2009, 01:03 PM
The authors of Audacity have written a filter.
http://forum.audacityteam.org/viewtopic.php?f=13&t=9141

Porcus
12-30-2009, 09:51 AM
I only have 2 or 3 pre-emphasized CDs. I doubt if anybody is going to have more than a handful them, so it's really not too bad.
I have quite a few (out of a total of 6000, I have to add). The most significant entries:

- The first Castle pressings of the old Black Sabbath albums.

- Some classical labels are using that thing still -- I guess that's because they are simply licensing an old recording. I have a box with Bach complete, and more or less the entire organ works part is pre-emph'd.

- Swedish darkwave label Cold Meat Industry -- here dBpoweramp reports partial matches.

jh901
04-19-2010, 06:59 PM
anyone have more to add to this by now?

i'm ashamed to admit that I have very few computer skills and I need a super automated "push button" way to apply de-emphasis to CDs that I wish to rip to flac using dBpoweramp....

i collect CDs and I have several with pre-emph flag in a pile awaiting rescue!

if there is a patient audiophile who is also a ripping expert who cares to volunteer a hand holding session, then PM me....

spl23
04-27-2010, 04:13 AM
If you rip a CD with pre-emphasis in iTunes, iTunes applies the relevant de-emphasis to the ripped files automatically. Yes, you lose the advantages of ripping with dbPA, but I'd have said that the correct frequency response on playback is more important - assuming your discs are clean, undamaged and well-pressed, iTunes will probably get the rip correct...

There's also a freeware Japanese ripping program that corrects for pre-emphasis called CD2WAV32.

Finally, there is a payware ripper called ACDR - this also corrects for pre-emphasis automatically, and the trial version works for long enough to rip a few CDs before you need to pay for it.

Porcus
04-27-2010, 04:45 AM
i'm ashamed to admit that I have very few computer skills and I need a super automated "push button" way to apply de-emphasis to CDs that I wish to rip to flac using dBpoweramp....

Tried EAC?

spl23
04-27-2010, 04:56 AM
Tried EAC?

Last time I used it, EAC didn't apply de-emphasis - it detects the flag, but does nothing with it.

Porcus
04-29-2010, 11:21 PM
Last time I used it, EAC didn't apply de-emphasis - it detects the flag, but does nothing with it.

You are right -- I was hung-up with my issue here, namely that dBp does not log. (EAC will put the flag in a cue sheet, and it is possible to decode-on-the-fly with certain audio players -- hence it is clear afterwards that de-emphasis was detected.)


I use SoX: http://sox.sourceforge.net/ -- a command-line tool with syntax like

sox infile.flac outfile.flac deemph


SoX is GPL, and I've nagged Spoon to support it as a DSP. (Edit: in this thread, even.)

jh901
05-07-2010, 09:31 PM
thanks for all the recommendations! i'll have to break down and put a little effort into this....

such a shame that dBpoweramp won't incorporate the ultimate solution....there are hundreds of SH Forum members that need to be pushed away from EAC over to here and this feature could be a good start....

i've always just assumed that this is the best ripper for audiophiles and i should think that many audiophiles would know by now that original issue CDs frequently have the very best sound quality....and of course, a good number of the earliest disc have pre-emph flag....

jh901
05-13-2010, 10:54 AM
ugh

i tried both ACDR and iTunes and neither seem to be applying the EQ correction. I tested it on 2 very well known "pre-emph" CDs, Billy Joel-52 St and Santana-Abraxas (both Japan 35DP).

i suppose a dBpoweramp solution is pretty far down on the enhancement list? There are so many early discs with pre-emph and they typically have stunning sound quality.

Here is a partial list:

Al DiMeola - Electric Rendezvous - 35DP 30

Anthony Braxton - Six Compositions (Quartet) 1984 - Black Saint
Anthony Braxton - Quartet (London) 1985 - 2CD, Leo CD LR 200/201

Asia - 35DP 25

Barbra Streisand - Guilty - 35DP 7
Barbra Streisand's Greatest Hits Volume 2 - 35DP 161
Barbra Streisand - The Way We Were - CK 32801/DIDP-20056

Beatles - Abbey Road - EMI CP35-3016 (Black Triangle)

The Blue Nile - Hats (1989 US; Linn/A&M CD 5284) [PROMOTIONAL stamp on label], (1989 European; Linn/Virgin LXHCD2)

Billy Joel - 52nd St. - 35DP 1 (Japan for Japan / Japan for US)
Billy Joel - The Stranger - 35DP 2
Billy Joel - Glass Houses - 35DP 18 (Japan for Japan / Japan for US)
Billy Joel - Songs In The Attic - 35DP 19
Billy Joel - The Nylon Curtain - 35DP 34
Billy Joel - Piano Man - CDCBS 80719 Japan for Europe with 35DP 109 in the matrix

Black Sabbath (All) CLACD and NELCDs have it

Boz Scaggs - Middle Man - 35DP 3
Boz Scaggs - Hits! - 35DP 11
Boz Scaggs - Silk Degrees - 35DP 20

Bruce Springsteen - Born to Run - Columbia CK 33795 / 35DP 21
Bruce Springsteen - Darkness on the Edge of Town - CBS/Sony 32DP 351
Bruce Springsteen - Darkness On The Edge Of Town - Japan CBS For Europe DIDP matrix)

Bruno Walter/Columbia Symphony Orchestra - Bruckner: Symphony No.4 - CBS/Sony 35DC 117
Bruno Walter/Columbia Symphony Orchestra - Bruckner: Symphony No.9 - CBS/Sony 35DC 114
Bruno Walter/Columbia Symphony Orchestra - Brahms: Symphony No.2 - Columbia MK 42021 / 35DC 86
Bruno Walter/Columbia Symphony Orchestra - Brahms: Symphony No.3 - Columbia MK 42022 / 35DC 87
Bruno Walter/New York Philharmonic Orchestra - Mahler: Symphony No.2 - 2CD, CBS/Sony 56DC131~132

Creative Sounds S/T

Electric Light Orchestra - Discovery - 35DP 24 / Austria, epic 450083 2/ JET-500 11
Electric Light Orchestra - Secret Messages - 35DP 72

Genesis - Genesis(S/T) WG Target and Vertigo 800 series CD's
Go-Go's - Talk Show - 35DP 146

Jeff Beck - There And Back - 358P-5

Jethro Tull - Under Wraps - Chrysalis 610 203 made in West-Germany (1984)

Journey - Escape - 35DP 6

Klaus Schulze: Irrlicht (AVI CD)

Lionel Richie - Can't Slow Down (US Motown)
Lionel Richie - Can't Slow Down (Motown MCD 06059MD Japan for U.S. CD)

Mark Knopfler - Cal - Vertigo 822 769-2

Men At Work - Business As Usual - 358P-15
Men At Work - Cargo - CK 38660 (U.S) and 35 8P-16 (both have PE)

Michael Jackson - Off the Wall - Epic/Sony Records ESCA 5407 made in Japan
Michael Jackson - Thriller - 1982 Epic/CBS CDEPC 85930 (DI8P-11); matrix: 35 8P-11 111A2 +++++

Miles Davis - Agharta - 50DP 237~8
Miles Davis - Pangaea - 50DP 239~40
Miles Davis - the later 50DP 7xx series Miles Davis do not have PE

Miles Davis - The Man With The Horn - 35DP 16
Miles Davis - Star People - 35DP 55
Miles Davis - Porgy and Bess - CBS/Sony 35DP 61
Miles Davis - Kind of Blue - Columbia CK 08163 / 35DP 62 does not have PE
Miles Davis - Sketches of Spain - Columbia CK 08271 / 35DP 63
Miles Davis - Someday My Prince WIll Come - 35DP 64
Miles Davis - My Funny Valentine - CBS/Sony 35DP 65
Miles Davis - Four and More - 35DP 66
Miles Davis - Miles in Tokyo - CBS/Sony 35DP 67
Miles Davis - Miles in Berlin - CBS/Sony 35DP 68
Miles Davis - E.S.P. - CBS/Sony 35DP 69
Miles Davis - In a Silent Way - CBS/Sony 35DP 70 does not have PE
Miles Davis - Decoy - 35DP 170 does not have PE

Mike Oldfield - Tubular Bells - WG CDV 2001 and Japan VJD-23001

New Order - Low Life - Factory Records import. I can't remember if it was French made or UK made.

Nick Lowe - Pinker And Prouder Than Previous (1988 Demon Records, UK; FIEND CD 99)

Norma Procter (contralto)/LSO/Jascha Horenstein -Mahler: Symphony 3 - 2CD, Unicorn-Kanchana UKCD 2006/7

Paul McCartney - Pipes of Peace - CDP 7 46018 2 (Made in Japan)
Paul McCartney - Give my Regards to Broadstreet - CDP 7 46018 2 (Made in Japan)
Paul McCartney - Tug of War - has pre-emphasis - My US-issued, Japan-made Columbia Tug of War CD does not have PE. But the
Japanese black-triangle disc definitely does.

Pink Floyd - Wish You Were Here - 35DP 4
Pink Floyd - The Dark Side of the Moon - CP35-3017
Pink Floyd - The Wall - 50DP 361~2 / CK2 and related masterings
Pink Floyd - The Final Cut - 35DP 53

Police - Synchronicity - 38XB-2 (10 track) The 11-track 38XB-2 does not have PE

Quarterflash - S/T - Japanese target pressing.

REO Speedwagon - Hi Infidelity - 358P-4

Roger Waters - Pros And Cons Of Hitch Hiking - 35DP 149 Dutch EMI/Harvest (CDP 7 46029 2) / US Columbia/CBS (CK 39290)

Santana - Shango - 35DP
Santana - Abraxas - 35DP 58

She's Having a Baby - OST

Simon And Garfunkel - The Simon And Garfunkel Collection - 35DP 13 and CDCBS 24005

T Bone Burnett - T Bone Burnett (1986 Dot/MCA Records MCAD-5809)

Tom Petty And The Heartbreakers - Southern Accents - MCAD-5486 (JVC Japan-for-USA)

Toto - Turn Back - 35DP 5
Toto - IV - 35DP 12
Toto - Hydra - 35DP 42

Ultravox - Vienna / CCD 1296 (UK Chrysalis)

Vangelis: Opera Sauvage (European CD, possibly the same one still in print now)

Velvet Underground - VU

Weather Report - 8:30 - 50DP 133~4

Spoon
05-13-2010, 02:17 PM
Sorry no it is not high on the todo list.

djs777
05-16-2010, 01:31 PM
Could you at least please add text to the .txt file that pre-emphasis was detected, rather than just flash this during a rip in the "track technical" area of the Ripper screen? Once the rip is completed, it seems all visibility into this key issue disappears. I had to manually re-insert all of my discs when I learned of this issue and found several discs that had this issue. If I have understood this incorrrectly and the info is captured in a file somewhere, can someone tell me where?

thanks!

djs777
05-16-2010, 01:38 PM
For those you have used SoX, what approach do you recommend:

- use SoX to rip a .wav file and then use dbpa on the .wav to rip to flac, mp3, etc
- use SoX to rip to flac, mp3 etc (don;t use dbpa at all)
- other?


thanks!

jh901
05-17-2010, 06:24 PM
For those you have used SoX, what approach do you recommend:

- use SoX to rip a .wav file and then use dbpa on the .wav to rip to flac, mp3, etc
- use SoX to rip to flac, mp3 etc (don;t use dbpa at all)
- other?


thanks!

i sure could use a proper step-by-step procedure....i'd like to have properly de-emphasized flac files in the end....

and why should this concern never get attention? i can't imagine it would be terribly difficult to fix dBpoweramp. does anyone realize how many members of SH Forum alone might be convinced to pay the $30/yr???

djs777
05-19-2010, 03:31 PM
bump

keysersoeze
05-20-2010, 12:39 PM
I'm pretty interested in knowing aswell djs :)

djs777
05-20-2010, 05:15 PM
I figured out how to use SoX and Ripper to create mp3 and flac files with deemphasis removed. The one, big problem I have is that all my tag info is gone, and open to any advice on how to not lose it in the process.

the steps I used:

- run Ripper to extract a .wav file for each track and apply tag data
- run SoX to apply its deemphasis filter, resulting in a corrected .wav file for each track (I could not get any version after 14.1.0 to work, so that's the version I used)
- run Converter on the corrected .wav files with multi-encoder to create my .mp3 and .flac files

But SoX stripped all tag data, and I'm stuck on this. Various ideas, input appreciated: Is there an option within SoX to aviod loss of tags? Can I run Ripper on the .wav files to re-apply tags, or does Ripper only work on CDs? Can I "trick" Ripper by dumping the .wav files to a CDROM and then using my disc drive to use Ripper? Can I export tags prior to running SoX and then import them again in some way?

I'm stuck, this has taken a huge amount of time to get this far, I'd hate to be defeated by the remaining obstacle, but I grow old.....any help appreciated.

Zorlac
06-13-2010, 10:02 PM
Will the "Track Technical" column say if a CD has the "pre-emphasis" flag?

Also, is there a list of pre-emphasis flagged CDs on the web anywhere?

Zorlac
06-14-2010, 12:44 AM
Also, is dBpoweramp checking both the TOC and Sub Channel for the pre-emphasis flag?

Spoon
06-14-2010, 03:07 AM
Only toc.

Zorlac
06-14-2010, 09:09 AM
Thx Spoon!

Any plans to add a second sub channel check for the pre-emphasis flag?

In the mean time, do you have any idea how we can look at the sub channel info to verify if our CDs have the pre-emphasis flag?

Spoon
06-14-2010, 02:34 PM
Only a handful of discs incorrectly have the TOC and subchannel disagreeing.

jh901
09-12-2010, 08:34 PM
Only a handful of discs incorrectly have the TOC and subchannel disagreeing.


I have tested several of my "PE" CDs and none are being picked up in the Track Technical field. This would be a nice feature if it worked. I'm using WaveEmph for my PE CDs, but I'm always not quite sure which have it.

I've reached the point where I'm willing to attempt to persuade EAC users to switch to dBpoweramp if only there is single step PE detection and proper de-emphasis. I really don't think Spoon or others realize what a big deal this is. Many dozens of the best sounding CDs ever pressed have PE. If some on this site only knew what they were missing....

dspargo
09-13-2010, 09:26 AM
I have tested several of my "PE" CDs and none are being picked up in the Track Technical field. This would be a nice feature if it worked. I'm using WaveEmph for my PE CDs, but I'm always not quite sure which have it.

I've reached the point where I'm willing to attempt to persuade EAC users to switch to dBpoweramp if only there is single step PE detection and proper de-emphasis. I really don't think Spoon or others realize what a big deal this is. Many dozens of the best sounding CDs ever pressed have PE. If some on this site only knew what they were missing....


Agreed...much needed!

Jeff Flowerday
09-13-2010, 09:32 AM
I have tested several of my "PE" CDs and none are being picked up in the Track Technical field. This would be a nice feature if it worked. I'm using WaveEmph for my PE CDs, but I'm always not quite sure which have it.

I've reached the point where I'm willing to attempt to persuade EAC users to switch to dBpoweramp if only there is single step PE detection and proper de-emphasis. I really don't think Spoon or others realize what a big deal this is. Many dozens of the best sounding CDs ever pressed have PE. If some on this site only knew what they were missing....

Unless you are running R14 beta it won't. Spoon added it in R14.

jh901
09-15-2010, 06:04 PM
Unless you are running R14 beta it won't. Spoon added it in R14.

I just paid for the R14 upgrade. The PE is not shown in the Track Detail field. Is this not a feature that I should expect to work?

Arnold_Layne
09-15-2010, 08:39 PM
Works for me. Tested it with an 80's Pink Floyd Wall CD.

A_L

Spoon
09-16-2010, 02:27 AM
It will not work for those CDs where PE is not highlighted in the TOC, only in the sub-codes - there are a few of these incorrectly mastered cds.

jh901
09-16-2010, 06:22 AM
Am I looking in the proper column? Track Technical

I've tested:

Billy Joel 52ST 35DP-1, Santana Abraxas 35DP-58, REO Speed Hi-Infidelity 35 8P-4, Springsteen Born to Run 35DP-21, PF- Wish You Were Here 35DP-4


All of these have PE and I should most would show it in the TOC. I know that The Beatles Abbey Road CP35-3016 has the sub-channel thing, but I'm not familiar with how often that's the case.

Arnold_Layne
09-16-2010, 04:53 PM
I tested with my 35DP-4 WYWH CD. At first since I had already ripped the CD with R14 beta, the pre-emphasis did not show up. I tried the cd a couple times, and finally the pre-emphasis flag showed up under Track Technical.

A_L

jh901
09-16-2010, 07:33 PM
I tested with my 35DP-4 WYWH CD. At first since I had already ripped the CD with R14 beta, the pre-emphasis did not show up. I tried the cd a couple times, and finally the pre-emphasis flag showed up under Track Technical.

A_L

Thanks Arnold

I've tried my WYWH "2-track" multiple times using refresh and also ejecting and reinserting. No luck. I have several PE discs, so I'll try them all. I wonder if I should clear some kind of cache or do some sort of reinstall?? I'm pretty bad with computer stuff, but I'm not a complete idiot. Any help from anyone here will be much appreciated!

Btw, you must be a CD collector or just plain lucky to have 35DP-4. It's still the best digital mastering of this album ever pressed.

Spoon
09-17-2010, 03:27 AM
You would switch on the Track Technical column, then press the refresh button.

dspargo
09-18-2010, 10:33 AM
Hello Spoon,

Can we get a away to properly rip pre-emphasized CDs?

Thanks,
Don

Spoon
09-18-2010, 03:17 PM
We do not have the de-emph filters, so is not a simple way of doing it.

kerframil
07-22-2011, 08:41 PM
- run SoX to apply its deemphasis filter, resulting in a corrected .wav file for each track (I could not get any version after 14.1.0 to work, so that's the version I used)

The latest version should work. I use the Windows build of SoX 14.3.2 and it's fine.


But SoX stripped all tag data, and I'm stuck on this. Various ideas, input appreciated: Is there an option within SoX to aviod loss of tags?

Sure. Don't use WAV! SoX supports FLAC natively so, if you rip to FLAC in the first instance, the metadata will be preserved upon using SoX. Here's an example of how I go about it from the command prompt:


cd \Users\kerframil\Music\Temp
for %F in (*.flac) do sox "%F" "..\%F" deemph

In this case, the files that needed deemphasizing were within a subfolder named Temp, within my Music folder. The de-emphasized files are duly saved within the parent folder i.e. the "Music" folder itself.

NOTE: The above example assumes that sox.exe is in the system PATH. If it isn't then use the full pathname of the program based on wherever it is installed. For example:


for %F in (*.flac) do C:\sox-14-3-2\sox.exe "%F" "..\%F" deemph

IrishPub
09-29-2011, 07:35 AM
Those of you searching for a way to apply de-emphasis to ripped files, one way I found of doing this is with the freeware program WaveEmph, which can be downloaded here (http://www.picosound.de/E_SOFT.HTM*emphasis). It was written for older Windows 9x operating systems. If you try to run it on a machine with Vista or Windows 7, it will report that it the computer is missing the file MSVBVM50.DLL. That file can be installed using a patch from Microsoft available here (http://support.microsoft.com/kb/180071).

As the name of the program implies, it only works on WAV files. It's UI is very basic, and it only runs one WAV file at a time, but that's fine as long as you don't have too many songs to process.

I used WaveEmph to de-emphasize the rip of my old Santana Shango CD, and now the album is finally listenable. (I don't have the 2011 30th anniversary remaster of Shango, but I hope they would have removed the pre-emphasis in that version.)

EDIT: I now see that WaveEmph was mentioned earlier in the thread, although the missing DLL issue was not.

Porcus
01-28-2012, 06:27 AM
Just want to mention that users of the foobar2000 player (why use anything else?) can use the nonstandard fix at http://www.hydrogenaudio.org/forums/index.php?showtopic=84544 to apply de-emphasis on-the-fly. It implements the algorithm of SoX.

Of course, a wishlist item for dMC would be to write to the tag, but logging is certainly better than nothing.




WaveEmph

As a matter of fact, WaveEmph and SoX give slightly different results: http://imageshack.us/photo/my-images/691/deemphpcmpre.gif/ . See the (somewhat noisy) thread at Hydrogenaudio: http://www.hydrogenaudio.org/forums/index.php?showtopic=65067 .

Looks like WaveEmph is adapted to a reference CD once issued by Denon. The thing is, the pre-emphasis was applied using an analogue filter, and if the device used in the mastering was off the reference curve, then ... well, de-emphasis should also be off in order to compensate. Now I have no idea whether Denon/Nippon actually used the most common component in their mastering ...

Probably you won't hear any difference, though.

atrocity
04-27-2012, 11:41 PM
I just got "Feasting with Panthers" by Marc Almond and Michael Cashmore today. It's a 2011 CD and it's pre-emphasized! At first I thought maybe the flag had just been set in error, but after comparing the original rip to files de-emphasized with Foobar2000 I think it might actually be true. I wonder what the story is behind that?

Porcus
04-29-2012, 10:15 AM
Argh. New record (no pun intended) I think. Last I heard of was my own purchased Lifelover: 'Konkurs', http://www.discogs.com/Lifelover-Konkurs/release/1513652 .

Of course, I have no idea why. Well the guy credited with mastering, Michael Zimmerling, has been in that game since the 70's, so he might have kept his old equipment and settings ...

theanswer337
12-29-2012, 05:28 AM
I'd like to bump this old thread and voice my request for a Pre-emphasis solution within dbPoweramp. I agree with jh901 that this is a big deal. Having the ability to detect (TOC and sub-channel) and eq a CD with pre-emphasis would, far and away, separate dbPoweramp from all other programs.

Spoon, is this something that you could revisit and hopefully offer a solution?

theanswer337
01-03-2013, 04:47 AM
I am not interested in Sox or any other program to handle this. I am hoping for a solution within dbPoweramp.

Porcus
01-09-2013, 05:55 PM
dBpoweramp can detect in TOC, but not in subchannel (unless recently updated).
Doing the EQ (which I wouldn't do anyway ...): there is always the Run External utility DSP so that you can call e.g. SoX from within dBpoweramp.

theanswer337
01-10-2013, 04:13 PM
dBpoweramp can detect in TOC, but not in subchannel (unless recently updated).
Doing the EQ (which I wouldn't do anyway ...): there is always the Run External utility DSP so that you can call e.g. SoX from within dBpoweramp.

What does this mean? That you wouldn't use Sox within dbPoweramp for the eq'ing?
Not familiar with running an external utility with dbPoweramp. Can you elaborate?

Porcus
01-10-2013, 04:47 PM
One of the utility DSP's can be used to run external processing on your files, which, I guess, would mean that you can use SoX from within dBpoweramp. I haven't tried.

I do not convert my pre-emphasized CDs. I tag them, and I use a media player with a plugin that recognizes the tag and applies the EQ on-the-fly (namely, foobar2000).
(Also, in order to make sure I have them identified even if I should screw up tags, I use a different file format, namely WavPack in place of FLAC).

Dexter
04-07-2013, 05:44 PM
Hi,
I just want to make sure that I'm understanding this correctly...

I upgraded my version of dBpoweramp from 14.3 to 14.4 today. My DSP Effects are at Release 9. Support for the detection of pre-emphasis was added to v14 when it released. The software will not de-emphasize the tracks.) However this support is ONLY for CDs where the TOC on a CD is flagged to indicate the presence of pre-emphasis. There is another way that a CD can be identified for the presence of pre-emphasis - dBpoweramp does not check for this. This other method is more rare & appears only on a handful of pre-emphasized CDs.

Theoretically, if I open dBpoweramp, with the Track Technical column showing, and insert a CD with pre-emphasis, there should be an indication of PE in the Track Technical column for each track before I start ripping. If there isn't, and the CD is on the list that was posted on page 2 of this thread, then chances are that TOC was not flagged & the other method was used.

I tested the following Billy Joel CDs:
The Stranger (35DP2-Japan for US)
52nd Street (35DP1-Japan for US)
Glass Houses (35DP18-Japan for US)
The Nylon Curtain (35DP34-Japan for US)

I saw nothing in the Track Technical column. The only CD I actually ripped (to FLAC & also to Wave) was 52nd Street. After the rip, I checked the tag - nothing was written (that I could see) in the tag - and I could not see this information in the list of available fields to include in the tag. (Pre-emphais is checked-off in the Tag Options.) Is it safe to assume that these supposedly pre-emphasized Billy Joel titles must use the alternate method of flagging the CD? Or am I misunderstanding all of this ... or don't have my dBpoweramp configured properly?

My concern is smple. I have a lot of old CDs. I can accept the fact that completely supporting pre-emphasis at this point in time would be time-consuming for such a small number of CDs. But I would like to be alerted befire I rip one. Thanks!

Porcus
04-08-2013, 03:09 PM
Is it safe to assume that these supposedly pre-emphasized Billy Joel titles must use the alternate method of flagging the CD?

Seems likely, assuming that there is indeed a pre-emphasis flag somewhere. Have you tried other applications to verify that?

slardy
01-31-2014, 12:05 PM
I am new to DBC and I can not find any information on where the Track Technical column is or how to turn it on.

Help Please?

slardy

Spoon
01-31-2014, 04:06 PM
You would right click on one of the column headers, such as Title then select.