Troubles with using compressed cd audio support in imgmount \ VOGONS

Troubles with using compressed cd audio support in imgmount

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First post, by Serious Callers Only

Posted on 2015-08-19, 17:41

Serious Callers Only Offline

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Not for the first time (but i can't remember the last game specifically) dosbox support for audio compression is giving me trouble... only in this case it happens even without converting to ogg.

The game is the cd version of spirit of excalibur, which has a whooping ~=700 mb of cd audio, which it uses too. Naturally i want to convert to ogg, but even before that, mounting it with wavs after ripping them with bchunk has troubles:
(the original image, which works perfectly):

1FILE "soe.img" BINARY
2   TRACK 1 MODE1/2352
3   INDEX 1 00:00:00
4   TRACK 2 AUDIO
5   INDEX 0 01:52:60
6   INDEX 1 01:57:50
7   TRACK 3 AUDIO
8   INDEX 1 52:53:45
9   TRACK 4 AUDIO
10   INDEX 1 55:13:27
11   TRACK 5 AUDIO
12   INDEX 1 55:32:55
13   TRACK 6 AUDIO
14   INDEX 1 56:01:00
15   TRACK 7 AUDIO
16   INDEX 1 57:37:07
17   TRACK 8 AUDIO
18   INDEX 0 57:53:10
19   INDEX 1 58:14:20
20   TRACK 9 AUDIO
21   INDEX 1 59:02:20
22   TRACK 10 AUDIO
23   INDEX 1 60:34:30
24   TRACK 11 AUDIO
25   INDEX 1 61:05:05
26   TRACK 12 AUDIO
27   INDEX 1 61:47:05
28   TRACK 13 AUDIO
29   INDEX 0 62:14:55
30   INDEX 1 62:37:27
31   TRACK 14 AUDIO
32   INDEX 1 62:49:52
33   TRACK 15 AUDIO
34   INDEX 1 63:14:05
35   TRACK 16 AUDIO
36   INDEX 1 63:50:40
37   TRACK 17 AUDIO
38   INDEX 1 64:05:65
39   TRACK 18 AUDIO
40   INDEX 1 64:36:57
41   TRACK 19 AUDIO
42   INDEX 1 64:54:55
43   TRACK 20 AUDIO
44   INDEX 1 65:07:60
45   TRACK 21 AUDIO
46   INDEX 1 65:18:35
47   TRACK 22 AUDIO
48   INDEX 1 65:27:47
49   TRACK 23 AUDIO
50   INDEX 1 65:39:47
51   TRACK 24 AUDIO
52   INDEX 1 65:57:47
53   TRACK 25 AUDIO
54   INDEX 1 66:11:65
55   TRACK 26 AUDIO
56   INDEX 1 66:24:45
57   TRACK 27 AUDIO
58   INDEX 1 67:55:20

the bchunk conversion. It's easy to see it's wrong because the fanfare at the Virgin logo (the first image) is missing. The voices play, but they cutoff at the wrong time

1FILE "spirit_of_excalibur.iso" BINARY
2  TRACK 01 MODE1/2048
3    INDEX 01 00:00:00
4FILE "Track 2.wav" MP3
5  TRACK 02 AUDIO
6    INDEX 01 00:00:00
7FILE "Track 3.wav" MP3
8  TRACK 03 AUDIO
9    INDEX 01 00:00:00
10FILE "Track 4.wav" MP3
11  TRACK 04 AUDIO
12    INDEX 01 00:00:00
13FILE "Track 5.wav" MP3
14  TRACK 05 AUDIO
15    INDEX 01 00:00:00
16FILE "Track 6.wav" MP3
17  TRACK 06 AUDIO
18    INDEX 01 00:00:00
19FILE "Track 7.wav" MP3
20  TRACK 07 AUDIO
21    INDEX 01 00:00:00
22FILE "Track 8.wav" MP3
23  TRACK 08 AUDIO
24    INDEX 01 00:00:00
25FILE "Track 9.wav" MP3
26  TRACK 09 AUDIO
27    INDEX 01 00:00:00
28FILE "Track 10.wav" MP3
29  TRACK 10 AUDIO
30    INDEX 01 00:00:00
31FILE "Track 11.wav" MP3
32  TRACK 11 AUDIO
33    INDEX 01 00:00:00
34FILE "Track 12.wav" MP3
35  TRACK 12 AUDIO
36    INDEX 01 00:00:00
37FILE "Track 13.wav" MP3
38  TRACK 13 AUDIO
39    INDEX 01 00:00:00
40FILE "Track 14.wav" MP3
41  TRACK 14 AUDIO
42    INDEX 01 00:00:00
43FILE "Track 15.wav" MP3
44  TRACK 15 AUDIO
45    INDEX 01 00:00:00
46FILE "Track 16.wav" MP3
47  TRACK 16 AUDIO
48    INDEX 01 00:00:00
49FILE "Track 17.wav" MP3
50  TRACK 17 AUDIO
51    INDEX 01 00:00:00
52FILE "Track 18.wav" MP3
53  TRACK 18 AUDIO
54    INDEX 01 00:00:00
55FILE "Track 19.wav" MP3
56  TRACK 19 AUDIO
57    INDEX 01 00:00:00
58FILE "Track 20.wav" MP3
59  TRACK 20 AUDIO
60    INDEX 01 00:00:00

…Show last 22 lines

61FILE "Track 21.wav" MP3
62  TRACK 21 AUDIO
63    INDEX 01 00:00:00
64FILE "Track 22.wav" MP3
65  TRACK 22 AUDIO
66    INDEX 01 00:00:00
67FILE "Track 23.wav" MP3
68  TRACK 23 AUDIO
69    INDEX 01 00:00:00
70FILE "Track 24.wav" MP3
71  TRACK 24 AUDIO
72    INDEX 01 00:00:00
73FILE "Track 25.wav" MP3
74  TRACK 25 AUDIO
75    INDEX 01 00:00:00
76FILE "Track 26.wav" MP3
77  TRACK 26 AUDIO
78    INDEX 01 00:00:00
79FILE "Track 27.wav" MP3
80  TRACK 27 AUDIO
81    INDEX 01 00:00:00

They're both mounted the traditional way:
imgmount d "cd/spirit_of_excalibur.cue" -t iso
#imgmount d "cd/soe.cue" -t iso

Is this a known bug or am i doing something stupid here? I would have thought that the problem if not mine or the ogg library could have been avoided by using wav first, but apparently not. Do games depend on trash data to play cd audio or something?

Reply 1 of 4, by Dominus

Posted on 2015-08-19, 20:14

Dominus Offline

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Posts: 9205
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There is something in the wiki about the cue file when using compressed audio (or whatever)

Windows 3.1x guide for DOSBox
60 seconds guide to DOSBox
DOSBox SVN snapshot for macOS (10.4-11.x ppc/intel 32/64bit) notarized for gatekeeper

Reply 2 of 4, by Serious Callers Only

Posted on 2015-08-19, 21:13

Serious Callers Only Offline

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Joined: 2003-04-26, 21:34

Yeah, i followed that.

Reply 3 of 4, by Serious Callers Only

Posted on 2015-08-20, 14:58

Serious Callers Only Offline

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Curious. I tried to regenerate the cue file from cd by using CUEgen:
http://www.cs.man.ac.uk/~slavinp/cuegen.html (this removed duplicate INDEX 0 entries).
It still seems to work when mounted (after adding the right .img name part anyway).
But again, when converted to wav+iso by bchunk, things are broken. Virgin logo fanfare (TRACK 24) and intro sound is no show. Voices seem to work without 'extra' audio for at least the 3 first conversations though, which is better than before.

('new' cue file)

1FILE "soe.img" BINARY
2  TRACK 1 MODE1/2352
3    INDEX 01 00:00:00
4  TRACK 02 AUDIO
5    INDEX 01 01:57:50
6  TRACK 03 AUDIO
7    INDEX 01 52:53:45
8  TRACK 04 AUDIO
9    INDEX 01 55:13:27
10  TRACK 05 AUDIO
11    INDEX 01 55:32:55
12  TRACK 06 AUDIO
13    INDEX 01 56:01:00
14  TRACK 07 AUDIO
15    INDEX 01 57:37:07
16  TRACK 08 AUDIO
17    INDEX 01 58:14:20
18  TRACK 09 AUDIO
19    INDEX 01 59:02:20
20  TRACK 10 AUDIO
21    INDEX 01 60:34:30
22  TRACK 11 AUDIO
23    INDEX 01 61:05:05
24  TRACK 12 AUDIO
25    INDEX 01 61:47:05
26  TRACK 13 AUDIO
27    INDEX 01 62:37:27
28  TRACK 14 AUDIO
29    INDEX 01 62:49:52
30  TRACK 15 AUDIO
31    INDEX 01 63:14:05
32  TRACK 16 AUDIO
33    INDEX 01 63:50:40
34  TRACK 17 AUDIO
35    INDEX 01 64:05:65
36  TRACK 18 AUDIO
37    INDEX 01 64:36:57
38  TRACK 19 AUDIO
39    INDEX 01 64:54:55
40  TRACK 20 AUDIO
41    INDEX 01 65:07:60
42  TRACK 21 AUDIO
43    INDEX 01 65:18:35
44  TRACK 22 AUDIO
45    INDEX 01 65:27:47
46  TRACK 23 AUDIO
47    INDEX 01 65:39:47
48  TRACK 24 AUDIO
49    INDEX 01 65:57:47
50  TRACK 25 AUDIO
51    INDEX 01 66:11:65
52  TRACK 26 AUDIO
53    INDEX 01 66:24:45
54  TRACK 27 AUDIO
55    INDEX 01 67:55:20

The cue that mounts bchunked iso+wav is basically the same as the second of the first post, nothing really changes in that.

Reply 4 of 4, by Serious Callers Only

Posted on 2015-08-24, 03:41

Serious Callers Only Offline

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Rank: Member
Posts: 421
Joined: 2003-04-26, 21:34

Eh. The same audio files converted from wav to ogg (with the last cue, that fixed the wrong offsets for voice audio) actually play the intro and voices.

Meaning something is probably wrong with how cue+wav is calculating length or something. Funny enough, if i try to replace a single ogg of the intro music by the corresponding wav file it plays something completely different in another file so (maybe) the game seeks by length, not by track. That must be the reason it's so sensitive (and also the reason i suspect there is something wrong in the calculation of wav track lengths).

Oh btw, in this game you probably want to use roland for music. The voice clips and some of the cd-audio is played regardless, but using for all the music makes the game have unacceptable pauses.

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