Skip to main content

Notice

Please note that most of the software linked on this forum is likely to be safe to use. If you are unsure, feel free to ask in the relevant topics, or send a private message to an administrator or moderator. To help curb the problems of false positives, or in the event that you do find actual malware, you can contribute through the article linked here.
Topic: MPC VBR flaws (low volume & ringing) (Read 82763 times) previous topic - next topic
0 Members and 1 Guest are viewing this topic.

MPC VBR flaws (low volume & ringing)

Reply #100
Quote
If you play nogap tracks out of sequence, you'll get clicking (even without ReplayGain). To avoid this, you should cross fade the tracks, or pay a DJ to do it for you!

If you play nogap tracks in sequence, you'll get clicking only when using ReplayGain in Track mode. In this case, you could also avoid clicks by using a simple cross fade as above, but that overlaps the tracks and actually loses a bit of audio.[a href="index.php?act=findpost&pid=312744"][{POST_SNAPBACK}][/a]
I'm sorry for the late reply.

Thank you for the detailed description.  I do know about that - it takes a bit of hand-editing in cases such as the one I described. My post was by no means of RG-bashing kind and I'm sorry if it sounded a bit like that. I just wanted to give an example that track gain can introduce some unwanted effects, because rjamorim was surprised to hear about problems. Peace.

Quote
And it's certainly more elegant than the DSP/3rd RG-mode solution Klemm suggested.
Hmm... Frank's idea is more complicated, but would solve not only clicks and sudden loudness jumps, but also help with very dynamic music, where some parts would have to be clipped to raise the avarage loudness to normal RG level. I think Frank had a very good idea. But I agree that 2Bdecided's proposed solution would be much easier to implement and would not change the general RG behaviour.

Quote
A simple ath_gain -10 with classical lead to the same average value than --ath_gain -40 with the second group!
Indeed. The relative difference is higher with classical music, too, when the ATH is lowered.


(thinking loudly) If -14 dB with Q5 were enough and lowering the ATH for all profiles chosen as a temporary solution (using an additional switch, for instance), maybe it would be sufficient to lower the ATH in profiles > Q5 to that level only ? We know it's already being lowered with each profile. This way, the bitrate would not change as much beyond Q5.

guruboolez, do you think the bitrate increases too much, when ATH is 14 dB lower ?

Best regards,
MTM

MPC VBR flaws (low volume & ringing)

Reply #101
Quote
My post was by no means of RG-bashing kind and I'm sorry if it sounded a bit like that.[a href="index.php?act=findpost&pid=313557"][{POST_SNAPBACK}][/a]


No worries, I didn't take it that way at all - it just reminded me of an idea which I decided to type out!

Cheers,
David.

MPC VBR flaws (low volume & ringing)

Reply #102
Phew.

MPC VBR flaws (low volume & ringing)

Reply #103
Quote
guruboolez, do you think the bitrate increases too much, when ATH is 14 dB lower ?

In my opinion (and it's only mine), MPC --standard was mainly intersting for the quality/bitrate ratio: near-transparency a only 175...180 kbps (i.e. less than LAME --preset standard or Vorbis -q6).


Current mppenc (1.15v) is less interesting than older release, due to the bitrate inflation (for classical, it's 7...10 kbps on average - sometimes 15...20 kbps with specific recordings). Now add 15...25 additional kbps with --ath_gain -14 command, and MPC --standard will clearly exceed 200 kbps. I let you imagine the gap between --radio and --standard. With such bitrate I would consider mpc --standard to my eyes as something less interesting than before.

MPC VBR flaws (low volume & ringing)

Reply #104
Quote
Frank's idea is more complicated, but would solve not only clicks and sudden loudness jumps, but also help with very dynamic music, where some parts would have to be clipped to raise the avarage loudness to normal RG level.[a href="index.php?act=findpost&pid=313557"][{POST_SNAPBACK}][/a]

That idea actualy is more that of an advanced compressor. Replaygain is the more practical idea, thus easier to support on many formats and players. 2Bdecided's idea of a volume fade, from one RG value into the next, could be a player feature. (zZzZzZz?)
In theory, there is no difference between theory and practice. In practice there is.