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1
Opus / Re: Can anyone reliably ABX OPUS at 160kbps?
Last post by polemon -
In more broader terms: Whenever seeking in the file quickly and accurately is important, CBR is the way to go.

So in a scenario where you're seeking in files, and you also do live-mixing, CBR is much easier to work with (from a hardware designer's or firmware programmer's perspective). Equipment like that often simply ditches anything but CBR entirely and just requires all files to be CBR, period. To keep things synchronized and responsive in a time-critical scenario,  hardware manufacturers take the easier route.
2
CD Hardware/Software / External Drive for Mac
Last post by tehabe -
In 2008 I bough an LG GP08 as an external DVD drive, it works okay. In 2018 I got a new one, An Asus SDRW-08U9M-U.

The Asus gives me accurate rips with XLD but has usually a lot of alternative offsets, like here for a pressed copy of "Automatic for the People"

Code: [Select]
List of alternate offset correction values
        #  | Absolute | Relative | Confidence
    ------------------------------------------
        1  |     42   |     36   |     400    
        2  |   -775   |   -781   |     384    
        3  |    -32   |    -38   |     78    
        4  |   -913   |   -919   |     49    
        5  |   -303   |   -309   |      9    
        6  |     48   |     42   |      2    
        7  |   -959   |   -965   |      2    
        8  |   -942   |   -948   |      2    
        9  |    508   |    502   |      2  

Alternative offsets for "Collapse Into Now"

Code: [Select]
List of alternate offset correction values
        #  | Absolute | Relative | Confidence
    ------------------------------------------
        1  |     60   |     54   |     364    
        2  |     54   |     48   |     281    
        3  |     18   |     12   |     54    
        4  |     48   |     42   |     25    
        5  |     66   |     60   |      3    
        6  |     -6   |    -12   |      2  

My question is, if the rips are accurate does it matter which offsets are recommended or should I change my settings? I currently use the setting 6 which suggested for the Asus U8M, for the U9M there is no setting in the database.
5
General - (fb2k) / Re: Undo tagging operations
Last post by fretless -
Far what it's worth, I also think an "Undo" button for tagging operations would be a useful feature.  I can think of a few times that it would have saved me a lot of time and trouble.   Not a "make or break" issue obviously, but I'd give the suggestion a +1.

And no, it's not something I could or would try to do myself.
6
Opus / Re: Can anyone reliably ABX OPUS at 160kbps?
Last post by jmvalin -
Opus has CVBR mode which is an equivalent to Apple AAC ABR.
Actually, as surprising as it may sound, Opus' CVBR is actually equivalent to what AAC encoders call CBR! That's because MPEG codec CBR modes use a bit reservoir where each frame is allowed to vary in bitrate so long as the cumulative deviation never exceeds the equivalent bits for one frame. Turns out that the Opus "constraint" in CVBR does exactly that. It's just that the bit packing is done more cleanly, without a bit reservoir. What Opus calls CBR (or sometimes hard CBR) is real CBR, with each frame being exactly the same size. That is something most MPEG codecs cannot do reliably without wasting bits.
7
Opus / Re: Vorbis Sounds better than Opus at 192 kbps.
Last post by lithopsian -
Might be worth the OP explaining just how the tracks being compared were generated.  Any easy-to-identify widespread differences between modern codecs at 192 kbps are more likely due to mistakes in encoding or playback than inherent in the codec itself.
8
Opus / Re: Vorbis Sounds better than Opus at 192 kbps.
Last post by lithopsian -
My experience is that Opus suffers from very occasional killer samples (or occasional incidents in longer tracks if you have the patience to listen for them) that don't completely resolve with higher bitrates.  Some of these have been fixed as outright bugs, but some remain.  Vorbis is generally worse than Opus at a given (relatively low) bitrate, as shown in multiple listening tests, but also more consistent in improving at higher bitrates.  I haven't found any Vorbis killer samples that don't just fade away for my ears by about 192 kbps.
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