OK... I'm finally stumped...!

  • Thread starter Thread starter Blue Bear Sound
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Blue Bear Sound

Blue Bear Sound

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I have a track that has 2 digital glitches on it -- they sound like 2 distinct clicks - always in the same spot... BUT............. there is no evidence of a transient spike in the waveform... no sign of a bad slice in the waveform... nothing that indicates there should be a glitch there!

I tried a de-clicker and it did nothing! (Which makes sense 'cos I can't even see a spike to begin with!) I tried frequency-specific compression, precise EQ, even manual-waveform editing -- nothing works! It's a DEMON track!!! :eek:

I know the artifact was introduced because of a cross-fade in Cubase (their audio editing is glitchy -- where's my SX upgrade!), but I can't see it anywhere on the waveform, no matter how deep I magnify it......!

Any ideas anyone? It's a blues harp track...

harp glitch

Bruce
 
I'm assuming the glitch does not exist on the ADAT. (assuming it was tracked on ADAT).

What happens if you transfer the track again into Cubase?

Sounds like a computer generated glitch. Almost like a 'skip' more than a glitch, the timing/length of the part sounds changed. Outside the obvious glitching, I do hear some other distortion in other parts, maybe the encoding.
 
Bruce - Got me. You sure it ain't the harp hitting his teeth :D
 
Emeric said:
I'm assuming the glitch does not exist on the ADAT. (assuming it was tracked on ADAT).

What happens if you transfer the track again into Cubase?

Sounds like a computer generated glitch. Almost like a 'skip' more than a glitch, the timing/length of the part sounds changed. Outside the obvious glitching, I do hear some other distortion in other parts, maybe the encoding.
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Yeah - the original takes were done on ADAT but I ported them into Cubase for comping and editing and that solo is the result...

Stupid me, I inadvertently trashed the track containing the comp'd parts and I noticed the glitching only after the comp'd part was sent back to ADAT... so I brought it back into Cubase but it's now a completed part and I've lost all my comp arrangement in Cubase (I'd have to start over again from the originals to re-create it!)

Blasted computers! They tease you with their advanced editing, but when you REALLY need it, they leave ya with you audio hangin'!!

Thanks anyways guys....... back to the editing board I guess................. :(
 
If you magnify the waves, you'll notice a funny, uneven shape to every other wave. It's just one of those things that happens sometimes, and there's nothing you can do about it. You're screwed.

Since you were mixing on DAW, you probably had some other things going on in the background that interfered while it was processing. Maybe it's time to re-optimize for audio, change your buffer settings and cross your fingers that it doesn't happen too often again. :)
 
But Chess... it's audible in 2 very distinct spots! (yes... the wave may be corrupt, but then you'd hear steady noise for the duration of the glitch, which is not what's being heard...!?!?!)

:confused: :confused: :confused:

:eek:

Sometimes, I wish I still had my tape-editing block!!! grrr.............. :(
 
MiXit-G said:
I get that a lot when editing in Cubase.
Click to expand...
I hope their SX version improves that.........!

It's on its way to me as we speak!
 
Bear, your waves look like this:

/\!(/\>*/\&

When they should look like this: /\/\/\

And it's in two distinct spots, but it isn't a quick pop or crack. It's an elongated kind of thing. Dust those headphones off for a second, and you'll hear it, too. :) :) :)

Actually, if someone were a good enough artist, they could probably fix it in Soundforge. I'd keep the editing block and razor blade in the cabinet. Just throw some reverb on it, and it will be fine.

Where's Tyler when you need him?
 
Did you have it set to find zero crossings when you made edit? Have you looked for any DC offset to fix? That's about all I can think of right now.

Sometimes weird shit happens and you can't explain it. I hate that crap.
 
I just tried everything I could think of including redrawing the wave with a pencil tool. It just won't go away damn it! I'm out of ideas, I quit. Good luck to ya Bear.......... Make sure there's a snare fill right there (hehe) :D
 
Why couldn't you use wavelab or soundforge to zoom into the wave and just delete that very small part that clicks. You won't even hear that missing audio if you do it right.
 
Oh yeah... I've tried that already! That's why I'm stumped!!
 
Bruce...

Just quit... seriously.....


I hear one person Ping Pong is a fun hobby... Or you could collect vintage Atari items, like the 2600 console and all the games..

:D

Recording is Evil. :D
 
Bruce, to me it sounds like a timing error of some kind. When you made the transfer from the ADATs, what was the clock set to? ADAT sync? Lightpipe?
 
Blue Bear Sound said:
I'm stumped!!
Click to expand...

This very thing happened to me recently. I was listening to a cd by a band called Static-X. Its a full up pro release, platinum album. When I listened to one song, I heard this clicking/popping noise during a refrain section with just the bass guitar. I consulted some matering engineers on how to approach telling the mastering facility about the problem, they all agreed I should contact the ME and let him know the dupers botched something. Anyhow, Ronnie Morris told me to do some wave form analysis on the section and then email the ME. But when I put the section in the wave form editor, the spikes were non-existent. There were no tree stumps either. I asked Ronnie what might be wrong, he asked me to send him the clip and he would try to fiugre it out. The next day Ronnie sent the clip back, Declicked, it sounded much better but there were still artifacts though very minimal. Ronnie told me he found some clicks that were well read the post.


Originally posted at Mastering Engineers Weboard by Ronnie Morris
Click to expand...

Ok, Dennis, this is not clipping, the bass section peaks at less than -3.5dB. These are digital spikes, cause unknown, can be wordclock anomalies or just corruption somewhere along the transfer chain. Chances are that the rep house is where this happened. I don't think that there is an ME alive that wouldn't notice them, unless it happened at the mastering house on the last transfer and the ME didn't check it. Anytime that you see the waveform with sections that have square sides, instead of horizontal rolling hills, when zoomed way in, it's usually digital errors, the result is no audio for a few milliseconds and a popping or clicking sound.
Good news is that they can be repaired, check your e-mail, I've restored the sample that you sent me to a 95 to 99% status.

Ronny Morris

The problem I have is obvious, the accuracy and resolution of the equipment made for homereccers isn't quite good enough to spot this stuff. Im using SF 4.5 and couldn't see it, I haven't taken it into PT yet, but the resolution graphically is more refined at higher zoom. It frustrates me to know that the $500 dollar digital editors won't guarantee you can find what your ears find. Bruce, you could leave it there and tell the ME you work with where its at, he most probably will fix it for ya. Just lem him know that you know its there but your not equipped to fix it at your facility. It happens right, if I couldn't see the square sides on SF, its concievable competing software might not as well. It goes to show that $500 software on a PC doesn't compare to a $20,000 Mastering Workstation.
I hope this helps relieve some of the "stump". Good Luck Bruce :)


Peace,
Dennis
 
Excellent post Dennis, thanks!!!

At least I know I'm not losing my marbles... and I can outsource it!

:)


Bruce
 
Track Rat said:
Bruce, to me it sounds like a timing error of some kind. When you made the transfer from the ADATs, what was the clock set to? ADAT sync? Lightpipe?
Click to expand...
I don't think it was in the actual transfer - I think it's Cubase messing up - either in the rendering of the ghost parts of the track, or when I applied an amplitude change to that particular ghost part...

I was clocking the BRC via the Lucid GenX96 and ADAT sync all along the chain from the BRC thru the ADATs and the computer.....

Bruce
 
Bruce, if within your computer you have the option set it to Lightpipe rather than ADAT sync.
 
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