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Topic: a mpc problem with an opera audio sample (Read 4584 times) previous topic - next topic
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a mpc problem with an opera audio sample

The opera I'm talking about is Richard Wagner's Tannhauser.  The specific recording is a 1989 recording conducted by Giuseppe Sinopoli with the Philharmonia Orchestra released by Deutsche Gramophone.

In track 2 about 7:00 into it, there is a heavenly choir of women, but MPC only gives it about 120 kbps thinking it's silence or something.  It comes out sounding watery or muddy (not sure what the term is).

Edit: I encoded it with --standard on windows with 0.90s.

Just wondering if anyone else has run into this.

a mpc problem with an opera audio sample

Reply #1 –
Could you provide a clip, compressed with FLAC if it's possible, please?

a mpc problem with an opera audio sample

Reply #2 –
Sorry, I don't have any place to host it and I'm not sure that a 50k attachment would be a big enough clip.

a mpc problem with an opera audio sample

Reply #3 –
You've to compress only the seconds where you can listen the artifact(s).

For example, you can host the file here, they give you around 30 MB of space.

a mpc problem with an opera audio sample

Reply #4 –
at 3:36 on track 10 there's a worse artifact.  On top of the baritone's vibrato is what sounds like a metallic overtone that halts as soon as the choir joins back in underneath him.  mpc --standard really hates his voice.  I will try again with --extreme.

I am trying to work out how to extract just the pertinent clips, but the winamp diskwriter doesn't seem to be able to do such a thing....

a mpc problem with an opera audio sample

Reply #5 –
Do this:

Download Goldwave from here, use this tool to load the WAVE file (you've to rip the track from the CD, using EAC for example) and then click on Edit -> Marker -> Set...
Type the seconds where is located the artifact, and then save using File -> Save selection as...

a mpc problem with an opera audio sample

Reply #6 –
Quote
Originally posted by b0b0b0b
I am trying to work out how to extract just the pertinent clips, but the winamp diskwriter doesn't seem to be able to do such a thing....


Or use mppdec. 
With that you can specify where to start and for how long to decode. (mppdec --start x --dur y source.mpc clip.wav)

a mpc problem with an opera audio sample

Reply #7 –
Quote
Originally posted by b0b0b0b
Sorry, I don't have any place to host it and I'm not sure that a 50k attachment would be a big enough clip.
Hi. I just sent you a private message concerning the upload of the original file.
So, you could upload after you have cutted and losslessly compressed the original.
No need to send any encoded samples.
Thanks.
Juha Laaksonheimo

a mpc problem with an opera audio sample

Reply #8 –
easiest way to get the sample clips:
if you've got EAC, you can rip a "range" (you can also do this with CDex) by hitting F7, or you can open the already ripped full file in the Wave Editor (choose "Process Wave" from the Tools menu) and highlight the proglem area and a few seconds on either side, and go to File --> "Save Selection As".  You can edit the wave in any other editing program, such as GoldWav.
Any good ripping program should be able to rip a range, if you can't get ahold of a Wave editing program or don't want to take the time to learn one at this point.
God kills a kitten every time you encode with CBR 320

a mpc problem with an opera audio sample

Reply #9 –
Quote
Or use mppdec.


I think it's better a FLAC version of the original, having in mind the possibility of making abx tests. Thanks for your post about EAC timcupery, I forgot about the Wave Editor. My apologizes.
 

a mpc problem with an opera audio sample

Reply #11 –
@JohnV:

Sorry, I sent a copy of the encoded sample.  I will post the original on monday for abx.