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HDCD Spotted - Post any rarities here

I spotted my first HDCD. Well, it came as a FLAC of a single track for a bug report, but I ended up buying it from the Discogs marketplace anyway, and it should be here within a week or less.

Pleymo - Doctor Tank's Medicine Cake: French nu metal, or something. Not too bad from what I've heard of this track. I figure I'll listen to it occasionally.

Anyway, I'm not sure if it applies to any of the other tracks on this pressing, but the second track, Tank Club, uses Peak Extension, and I got an apparent bug report that foo_hdcd triggered on it, which it did correctly, since the track does make use of HDCD signaling and production. PE was the only feature used, and it managed to completely negate what otherwise looked like brickwall mastering of the original track.

I'll wait until my CD arrives and post scan results for the entire thing.

Feel free to post any other stories of unexpected HDCD findings.

Re: HDCD Spotted - Post any rarities here

Reply #1
I could try to look up some, but if I may then reiterate a feature request: the "HDCD Scan Result" window, could there be a way to sort the output and drag the content to a playlist?

and it managed to completely negate what otherwise looked like brickwall mastering of the original track.
Sounds plausible even without any ABX log :-o

Re: HDCD Spotted - Post any rarities here

Reply #2
Here is a strange one: https://www.discogs.com/Clawfinger-Clawfinger/release/5533875

According to my logs, I did unfortunately convert it upon ripping using HDCD.exe (one of those mistakes of my youth). But that makes this even stranger.
- It verifies AccurateRip with a different offset (with 1 to 5 different offsets, actually!), indicating there are HDCD-decoded pressings around.
- The HDCD code is not gone, at least not from the beginning: the tracks show up as HDCDs. And if I enable halving volume, it will boost volume after ten seconds.


... edit: is it perchance so that foo_hdcd has some 10 seconds window before it turns off? And that the explanation for the AccurateRip behaviour is just the beginning of the track?

Re: HDCD Spotted - Post any rarities here

Reply #3
Cannibal Corpse - Gore Obsessed. It is very unexpected to find brutal death metal released in HDCD.

Re: HDCD Spotted - Post any rarities here

Reply #4
It is very unexpected to find brutal death metal released in HDCD.

Need not be, as a particular piece of studio equipment would use HDCD by default. Three of my HDCDs:
http://www.metal-archives.com/albums/Behemoth/Demigod/53348
http://www.metal-archives.com/albums/Macabre/Murder_Metal/29033
http://www.metal-archives.com/albums/Rotten_Sound/Exit/60143

... in addition to less Cannibal Corpse-ish bands like Dimmu Borgir, I (= Abbath from Immortal), In Flames, Machine Head, Megadeth, Meshuggah, Opeth and Soilwork. Not sure how many HDCD features were used though, these were decoded.  A mistake yes.
FWIW, my copies of Vile and The Wretched Spawn are not HDCDs.

Re: HDCD Spotted - Post any rarities here

Reply #5
I have two 'greatest hits' CDs, one by Johnny Cash, another by Thelonius Monk, where hdcd scan shows only one encoded track on the disc.

In the reverse case, Mike Oldfield's Ommadawn HDCD, the last track is not HDCD-encoded.

Re: HDCD Spotted - Post any rarities here

Reply #6
This one: https://www.discogs.com/Utah-Phillips-Ani-DiFranco-Fellow-Workers/release/391967
foo_hdcd claims track 1 is a HDCD (no features employed). hdcd.exe reports that it is not a HDCD.
Furthermore, hdcd.exe decoded tracks 4-6, 10 and 13-15 as hdcd.exe were decoded by hdcd.exe

This is not a compilation where the tracks are from different "sources" in that sense; it claims to be recorded "before a live in-studio audience". I can only guess tracks 2,3,7-9 and 11-12 required less ovedubs afterwards ;-)

I have two 'greatest hits' CDs, one by Johnny Cash, another by Thelonius Monk, where hdcd scan shows only one encoded track on the disc.
I have a few "compilations" and the like with mixed HDCDness. Glenn Hughes: "Different Stages" is a double CD with precisely one HDCD track on each physical disc.

Re: HDCD Spotted - Post any rarities here

Reply #7
If it is possible, could you scan with ffmpeg hdcd filter and post the output? It requires building ffmpeg from source, but it will give detailed stats about the HDCD encoding.

For example:
ffmpeg -nostats -v verbose -i Neil_Young/Neil_Young-Silver_&_Gold.flac -af hdcd -f s24le /dev/null 2>&1 | grep "_hdcd_"

Output would look something like this:
[Parsed_hdcd_0 @ 0x1d8eab0] Process mode: process stereo channels together
[Parsed_hdcd_0 @ 0x1d8eab0] Force PE: off
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 0: counter A: 0, B: 30040, C: 30040
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 0: pe: 30040, tf: 9226, almost_A: 0, checkfail_B: 0, unmatched_C: 0, cdt_expired: 0
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 0: tg 0.0: 28980
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 0: tg -0.5: 83
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 0: tg -1.0: 90
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 0: tg -1.5: 77
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 0: tg -2.0: 57
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 0: tg -2.5: 57
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 0: tg -3.0: 84
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 0: tg -3.5: 58
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 0: tg -4.0: 554
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 1: counter A: 0, B: 30040, C: 30040
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 1: pe: 30040, tf: 9233, almost_A: 0, checkfail_B: 0, unmatched_C: 0, cdt_expired: 0
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 1: tg 0.0: 28978
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 1: tg -0.5: 85
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 1: tg -1.0: 91
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 1: tg -1.5: 77
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 1: tg -2.0: 56
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 1: tg -2.5: 57
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 1: tg -3.0: 84
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 1: tg -3.5: 58
[Parsed_hdcd_0 @ 0x1d8eab0] Channel 1: tg -4.0: 554
[Parsed_hdcd_0 @ 0x1d8eab0] HDCD detected: yes, peak_extend: enabled permanently, max_gain_adj: -4.0 dB, transient_filter: detected, detectable errors: 0


If using linux:

% git clone git://source.ffmpeg.org/ffmpeg
% cd ffmpeg
% ./configure && make

And there is a multi-file scanning script on the wiki.

After scanning, perhaps even add your results to List of HDCD-encoded Compact Discs  :)

Thanks.

Re: HDCD Spotted - Post any rarities here

Reply #8
After scanning, perhaps even add your results to List of HDCD-encoded Compact Discs

What a nice idea, thank you very much for creating that list. Actually I started a similar one just for myself a few years ago but I haven't updated for a very long time (available here for anyone interested), so I'll gladly contribute.

Just as a suggestion regarding the list, I think it would be really useful to add to the table the label and maybe the catalog number of each release as well to identify which pressings are actually HDCD encoded from those that aren't - or even possible, to differentiate several HDCD releases of a same disc that came out with a different set of features enabled.

Regards

Re: HDCD Spotted - Post any rarities here

Reply #9
... so I'll gladly contribute.
Just as a suggestion regarding the list, I think it would be really useful to add to the table the label and maybe the catalog number of each release as well to identify which pressings are actually HDCD encoded from those that aren't - or even possible, to differentiate several HDCD releases of a same disc that came out with a different set of features enabled.
Cool, very similar thoughts.  :). Added columns sound good, go ahead, but lets talk about any other changes at Talk:List of HDCD-encoded Compact Discs so that we don't take this thread off-topic, away from information about HDCD rarities.

Re: HDCD Spotted - Post any rarities here

Reply #10
This one: https://www.discogs.com/Utah-Phillips-Ani-DiFranco-Fellow-Workers/release/391967
foo_hdcd claims track 1 is a HDCD (no features employed). hdcd.exe reports that it is not a HDCD.
Furthermore, hdcd.exe decoded tracks 4-6, 10 and 13-15 as hdcd.exe were decoded by hdcd.exe
I've scanned the sample you sent, and it is not HDCD, it just happens to have a sequence that appears to be valid HDCD. Here is the ffmpeg output:
  [Parsed_hdcd_0 @ 0x22725e0] Process mode: process stereo channels together
  [Parsed_hdcd_0 @ 0x22725e0] Force PE: off
  [Parsed_hdcd_0 @ 0x22725e0] Channel 0: counter A: 0, B: 1, C: 1
  [Parsed_hdcd_0 @ 0x22725e0] Channel 0: pe: 0, tf: 0, almost_A: 0, checkfail_B: 0, unmatched_C: 0, cdt_expired: 1
  [Parsed_hdcd_0 @ 0x22725e0] Channel 0: tg 0.0: 1
  [Parsed_hdcd_0 @ 0x22725e0] Channel 1: counter A: 0, B: 0, C: 0
  [Parsed_hdcd_0 @ 0x22725e0] Channel 1: pe: 0, tf: 0, almost_A: 0, checkfail_B: 0, unmatched_C: 0, cdt_expired: -1
  [Parsed_hdcd_0 @ 0x22725e0] Channel 1: tg 0.0: 0
  [Parsed_hdcd_0 @ 0x22725e0] HDCD detected: no

Channel 0 has one valid packet that signals PE off and adjust gain 0.0. Check out Talk:List of HDCD-encoded Compact Discs § False Positives, for a bit more about this. Also check out FFmpeg ticket #5727 for an example of a worst case false positive.

Re: HDCD Spotted - Post any rarities here

Reply #11
By false positive, you mean something more than those which just have a HDCD flag but no HDCD features?
Like, it the audio does at some point in the stream, coincide with something that the HDCD spec interprets as HDCD information?

Re: HDCD Spotted - Post any rarities here

Reply #12
In the example you sent, there is a completely valid HDCD packet in one channel, but the packet happens to signal PE:off, LLE:0.0, so it has no effect. In the example linked in issue #5727, the coincidental valid packet signals -6.0dB gain adjust in one channel, so one channel drops volume quite unexpectedly, and in a very noticeable way. Both of the examples are really not HDCD encoded, it was just a coincidence that the bits aligned in exactly the right way to form a valid packet, and may be detected as HDCD when they are not. This is not the same as an HDCD-encoded disc that signals PE:off, LLE:0.0 in every packet (uses no features).

Re: HDCD Spotted - Post any rarities here

Reply #13
Right. So that CD has some tracks that are detected as HDCD by hdcd.exe, some that are not, and one that is not despite containing one HDCD packet in one channel - I think I should dig up that CD sometime to find out what is really in those tracks I let hdcd.exe decode :-/

@kode54: considering https://hydrogenaud.io/index.php/topic,79427.msg900371.html#msg900371 , it may be that there are quite a few "false positive by coincidence" cases, and that you should change foo_hdcd's behaviour towards single-channel packets?

Re: HDCD Spotted - Post any rarities here

Reply #14
Does anyone know what is the maximum gain that LLE can adjust? AFAIK, usually HDCDs that use it come with a gain between -2.0 and -4.0dB, but this live version of Yngwie Malsmteen - Concerto Suite... (discogs), reaches up to -7.5dB in a few tracks.

Code: [Select]
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: counter A: 0, B: 44601, C: 44601
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: pe: 0, tf: 0, almost_A: 0, checkfail_B: 0, unmatched_C: 0, cdt_expired: 0
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg 0.0: 43048
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -0.5: 238
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -1.0: 190
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -1.5: 157
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -2.0: 111
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -2.5: 111
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -3.0: 103
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -3.5: 114
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -4.0: 107
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -4.5: 101
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -5.0: 105
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -5.5: 85
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -6.0: 45
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -6.5: 34
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -7.0: 20
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -7.5: 32
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: counter A: 0, B: 44601, C: 44601
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: pe: 0, tf: 0, almost_A: 0, checkfail_B: 0, unmatched_C: 0, cdt_expired: 0
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: tg 0.0: 43048
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: tg -0.5: 238
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: tg -1.0: 190
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: tg -1.5: 157
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: tg -2.0: 111
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: tg -2.5: 111
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: tg -3.0: 103
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: tg -3.5: 114
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: tg -4.0: 107
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: tg -4.5: 101
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: tg -5.0: 105
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: tg -5.5: 85
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: tg -6.0: 45
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: tg -6.5: 34
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: tg -7.0: 20
[Parsed_hdcd_0 @ 0000000000647940] Channel 1: tg -7.5: 32
[Parsed_hdcd_0 @ 0000000000647940] HDCD detected: yes, peak_extend: never enabled, max_gain_adj: -7.5 dB, transient_filter: not detected, detectable errors: 0

Re: HDCD Spotted - Post any rarities here

Reply #15
Wow, that is a really interesting specimen. -7.5dB is the lowest value that can be stored in the control code. There was a chansen post around here somewhere with detailed information, and I thought he said that a value below -6.0 would never actually be seen, so this is interesting. I'm mobile right now but I'll definitely look into this more when I get home.

Re: HDCD Spotted - Post any rarities here

Reply #16
There appear to be two types of HDCD packets:
* one that stores a 3-bit gain adjust value, 8 possible values representing -7dB through 0dB in steps of 1dB
* a second that stores a 4-bit gain adjust value, but uses it as a 3.1-bit fixed-point number, 16 possible values used as -7.5dB through 0dB in steps of 0.5dB.
So the maximum gain adjust value that can be encoded is -7.5dB. An aside: I've never seen the first type in an actual HDCD-CD, ever, but someone put it in the code who knows something more than I do.

Regarding that CHansen post I mentioned, he quotes an excerpt of the PM A/D operators' manual (which can be read at that link), then goes on to say:
Quote from: CHansen
If you see a level of greater than 4.0 of gain adjustment, there was an error made in the disc where the mastering engineer mistakenly used "Special Mode". This is not only wrong, but there is no consumer equipment that can even decode this level of gain adjustment! Only by playing this back through the PM Model One (44 and 48 kHz only) or the PM Model Two (added dual- and quad-rate sampling rates) could this file be properly decoded...
If what he is saying is correct, then that CD was a mistake by an unqualified mastering engineer, or maybe they've intentionally started using the full range of gain adjust. It seems CHansen is much more a hardware expert than software, and I think it might be an interesting thought, that now there is an open-source software implementation, perhaps the full range can be used when it could not in hardware alone.  :) Maybe I'm being too optimistic or something.

Another note, a fix for the previously mentioned ffmpeg issue #5727 has been applied, details here. Now stereo channels are processed together, and only gain values matching in both channels are actually used.

Re: HDCD Spotted - Post any rarities here

Reply #17
Quite interesting info, thank you. So it means that a small portion of this album cannot be properly decoded by HDCD-capable players. According to the ffmpeg log I posted, packets that trigger gains below -4.0 aren't that many in the full album:

[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -4.5: 101
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -5.0: 105
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -5.5: 85
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -6.0: 45
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -6.5: 34
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -7.0: 20
[Parsed_hdcd_0 @ 0000000000647940] Channel 0: tg -7.5: 32

That makes 377 (out of 44601), although most tracks seems to contain some of them. I just do not know if the difference in gain would be applied long enough to make it noticeable.

Re: HDCD Spotted - Post any rarities here

Reply #18
Maybe I'm being too optimistic naive or something.
Fixed that.  :)
It does look like the kind of inadvisable use of "Special Mode" that CHansen talked about.

Re: HDCD Spotted - Post any rarities here

Reply #19
There appear to be two types of HDCD packets:
* one that stores a 3-bit gain adjust value, 8 possible values representing -7dB through 0dB in steps of 1dB

I think I found an example of this. The HDCD Sampler disc from 1992 contains LLE packets which go up to -7.0 in -1dB steps accross all tracks.

Code: [Select]
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: counter A: 23471, B: 0, C: 23471
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: pe: 23471, tf: 9390, almost_A: 0, checkfail_B: 0, unmatched_C: 0, cdt_expired: 0
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: tg 0.0: 22490
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: tg -0.5: 0
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: tg -1.0: 232
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: tg -1.5: 0
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: tg -2.0: 165
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: tg -2.5: 0
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: tg -3.0: 104
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: tg -3.5: 0
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: tg -4.0: 54
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: tg -4.5: 0
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: tg -5.0: 60
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: tg -5.5: 0
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: tg -6.0: 80
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: tg -6.5: 0
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 0: tg -7.0: 286
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: counter A: 23487, B: 0, C: 23487
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: pe: 23487, tf: 9978, almost_A: 0, checkfail_B: 0, unmatched_C: 0, cdt_expired: 0
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: tg 0.0: 22506
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: tg -0.5: 0
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: tg -1.0: 233
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: tg -1.5: 0
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: tg -2.0: 165
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: tg -2.5: 0
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: tg -3.0: 104
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: tg -3.5: 0
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: tg -4.0: 54
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: tg -4.5: 0
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: tg -5.0: 60
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: tg -5.5: 0
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: tg -6.0: 80
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: tg -6.5: 0
[Parsed_hdcd_0 @ 0000000000f6dae0] Channel 1: tg -7.0: 285
[Parsed_hdcd_0 @ 0000000000f6dae0] HDCD detected: yes, peak_extend: enabled permanently, max_gain_adj: -7.0 dB, transient_filter: detected, detectable errors: 0

Related to this, is there a way to know when each gain is being adjusted somehow? Currently I have foobar configured to display the HDCD info in realtime on the statusbar, however LLE uses to be triggered so briefly that is quite hard to tell when -7.0 or -6.0dB are attenuated just by looking at it.

Re: HDCD Spotted - Post any rarities here

Reply #20
I think I found an example of this. The HDCD Sampler disc from 1992 contains LLE packets which go up to -7.0 in -1dB steps accross all tracks.
Neat, I've never seen one that used the 'A' format packet legitimately. Counter A is the verification there. I've written a bit about the two packet formats at HDCD § Packet formats.

It is interesting that this disc is from 1992, and all the discs that I've scanned are from years later and only have B format packets. I wonder when the 16-bit format with the 4-bit target gain and XOR check was introduced.

Re: HDCD Spotted - Post any rarities here

Reply #21
Related to this, is there a way to know when each gain is being adjusted somehow?

I create an "analyze mode" in the ffmpeg filter that outputs a solid tone with amplitude signaling where a certain feature was used.
Then the output can be loaded along side the original in an audio editor where it is possible to see what the features were turned on at any point in the track. In the Audacity screenshot attached, the top track is the original audio, the middle track is where LLE is used, and the bottom track is where PE was used.

In this case, it is Neil Young - Great Divide (because it uses all features). You can see that the LLE is only during the fade-in.

Re: HDCD Spotted - Post any rarities here

Reply #22
Looks pretty good!  Although I assume it isn't merged on github yet, right?

Actually I believe an analyzer like this could be pretty useful to find spots on discs which could be interesting to perform ABX tests with. Strictly speaking about LLE decoding I am not aware on any blind test focused on it and these two discs with 'extreme' gains may come in handy as starting point.

Re: HDCD Spotted - Post any rarities here

Reply #23
Looks pretty good!  Although I assume it isn't merged on github yet, right?
Not yet, but I can send you (or anyone interested) a patch to apply manually, if you like.

Re: HDCD Spotted - Post any rarities here

Reply #24
The HDCD component for foobar2000 has been updated  :D

 
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