View Issue Details
ID | Project | Category | View Status | Date Submitted | Last Update |
---|---|---|---|---|---|
0008029 | ardour | bugs | public | 2020-04-20 08:47 | 2020-05-27 22:12 |
Reporter | MisterBenjamin | Assigned To | |||
Priority | normal | Severity | minor | Reproducibility | always |
Status | closed | Resolution | fixed | ||
Platform | Some Other Linux | OS | Some Other Linux | OS Version | unknown |
Product Version | 6.0-pre1 | ||||
Summary | 0008029: CD marker should not be restricted to at least two seconds after session start | ||||
Description | A few days ago, '0007942: Disallow placement of a CD marker at location zero' removed the possibility to place a CD marker at session start (zero). Before it was possible and one could export a valid cue with it, but after saving and reopening the session, the same policy was enforced by removing the CD flag from the marker. After some research, it is my understanding that the cue sheet "should not or even must not" list the 2 seconds pregap for track 1 to fulfill the Redbook standard. It is added by means of the 'PREGAP' command (generated silence not part of the data file) by the software interpreting the cue sheet. Currently, when placing the first CD Marker two seconds (or more) after session start, an exported cue will contain an additional "index 0" pregap, which might contain audio (e.g. hidden track). This "potentially audible" pregap will be added to the two seconds of "generated pregap", so that with an Ardour exported cue you will always at least have a 4 seconds pregap, which is not desired. It might even lead to problems with some CD players. My understanding is based on some experimentation and sources on the internet which are in german, so I will not link them here. Isn't there a proper standards document for CUE sheets? Burning a couple of CDs with various versions of an exported cue, I learned that cdrdao and wodim (cdrecord) handle things a bit different. cdrdao seems to be more forgiving and also does what you would expect. wodim's cue handling is a bit awkward. wodim doesn't accept a cuefile which you exported from Ardour which has the two seconds Track 1 Index 0 pregap. It also complains that the session end marker wasn't snapped to CD frames. wodim creates audible pregaps (index 0) of two seconds from the previous track's ending, even if they are not listed in the cue sheet. cdrdao seems to do what the cue really tells him, plus generating and inserting the two seconds pregap for Track 1. Some sources claim, that to be really Redbook standard conform, you need to have at least two seconds (silent) pregap between the tracks, but in my experience all CD players (including my Technics from 1992) don't care. | ||||
Tags | No tags attached. | ||||
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Long story short: By allowing CD markers to coincide with session start, an exported cue can be recorded with cdrdao and wodim and both will generate a two seconds pregap. By disallowing CD markers to coincide with session start, cdrdao will produce a CD with 4 seconds pregap and wodim will not accept the cue. |
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Fixed in 974ae5100f |
Date Modified | Username | Field | Change |
---|---|---|---|
2020-04-20 08:47 | MisterBenjamin | New Issue | |
2020-04-20 08:57 | MisterBenjamin | Note Added: 0023823 | |
2020-05-27 22:11 | MisterBenjamin | Note Added: 0024285 | |
2020-05-27 22:12 | MisterBenjamin | Status | new => closed |
2020-05-27 22:12 | MisterBenjamin | Resolution | open => fixed |