Help - Search - Members - Calendar
Full Version: MPC encoder offset?
Hydrogenaudio Forums > Lossy Audio Compression > MPC
Uosdwis R. Dewoh
Hello all,

I was just wondering:

is there a need to specify any offset for the mpc encoder in EAC? The reason I'm asking is that I've been getting a click when using the Gapless Output plug-in for Winamp. The strange thing is that it does not appear when I listen to the two wav's in sequence, but it's there when listening to the mpc's.

If it's my cd-rom, it should be on both, right? I have corrected for the cd-rom before, and no clicks has appeard since. Of course, there is the possibility of them being there, but in less critical situations where they are not audible.

I tried with both the 1.7.9c and Klemm's 0.90i. When I hit "Detect offset" in EAC, the mppenc window appears and disappears, and then EAC reports an "Error on compression/decompression!".

What could the problem be? Why am I getting these clicks?

Thanks in advance.

/ Uosdwis
Dibrom
Offsets will not work. MPC does not add samples to the file when encoding, but it is not perfectly gapless either. Sometimes it will work gaplessly OK, but sometimes it won't. This is an issue I believe is going to be worked on for sv8.
Uosdwis R. Dewoh
Ah.

Bad news then. sad.gif

Anyway, thanks for your reply Dibrom.

/ Uosdwis
huanjo
I may be getting in over my head here, but ID3v1 tags may cause a problem if the decoder does not recognise them.
ID3v1 tags are 128 bytes which equates to about 0.006 seconds which may cause an audible click in between tracks.
Try removing ID3v1 tags and see if that helps.
ears
What gapless crossfading plugin are you using? I'm using the SQR crossfader for Winamp and it is flawless on my Win2K machines with .wav, .mpc, .mp3, and .ape files. You can find it at
http://www.winamp.com/plugins/browse.jhtml;$sessionid$MAERSRQABOP1K5YAAAARCZQ?categoryName=Output

Good luck.
Uosdwis R. Dewoh
Hello.

ears, I downloaded that plug-in and gave it a try. The Gapless Output plugin merely sticks the two files together, which makes uneven joints appear in all their glory. This SQR thing crossfades and does all kinds of tricks.

While the clicks are still there, SQR masks them up pretty well - on some tracks they're completely inaudible. This gives me less of a headache and is what I'll use from now on. Let's hope that this issue can indeed be worked out for SV8.

huanjo, the id3 tagging has no effect. *phew* smile.gif

Cheers,

Uosdwis
spase
i have never had this clicking and non-gapless problem before and i have been using mpc for a long time.

what mode are you using to rip the tracks?

also maybe there are headers being added to the wav files?

just a thought
Uosdwis R. Dewoh
Hello spase.

I am using EAC in secure mode with accurate stream, no caching, no c2 error correction. The drive's read-offset is +658 samples, as determined (and confirmed twice) by the DAE test in CD Speed.

I checked my EAC settings and there's nothing that indicates what the problem could be. Like I said, it does not appear on the .wav-files, but it's there on the .mpc's. I verified this using two different encoders, and by encoding the .wav's using the MPC frontend to make sure EAC didn't do anything.
Weird, huh? :confused:

So it looks to me like it is indeed the encoder(s). The passage that gives me problem is basically a held note spanning over two tracks.

Thanks for your help.

/ Uosdwis
NickSD
Does anyone know what the likelihood is that SV8 will have true gapless encoding? I'd like to encode my entire CD collection but I'm thinking that maybe I should wait for SV8 since I've noticed small (but noticeable) clicks between a few tracks here and there with SV7. When is the expected release date for SV8?

Also, with OGG becoming a major contender in the lossy encoding arena, do you see OGG becoming equivalent to MPC quality-wise any time soon? If so, how soon? Is OGG gapless in all cases, or does it plan to be?

Thanks!
Garf
QUOTE
Originally posted by NickSD
Is OGG gapless in all cases, or does it plan to be?


Unless I'm mistaken, Ogg is already gapless in all cases.

--
GCP
This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.
Invision Power Board © 2001-2008 Invision Power Services, Inc.