12 Oct
2003
12 Oct
'03
7:16 p.m.
On Sun, 12 Oct 2003 02:48:20 -0500
"Pete Bessman" <ninjadroid(a)ml1.net> wrote:
So I got a bunch of samples lying around from my
FruityLoops days, and I
want to make use of 'em. The catch is, they're not standard PCM encoded
WAV files. While they are waves, they use format '674f', and I can't
figure out exactly what it is. XMMS can play it, sox doesn't know what
to do with it, and I've grepped the crap out of libsndfile and
libaudiofile and haven't found reference to it. Anybody know anything
about this? I'm about to go through the XMMS sources, so my post here
might be premature, but any and all leads will be appreciated.
I asked for a copy of this file in a private email to Peter. Turns out this
is VERY interesting. Here is the hexdump:
00000000: 52 49 46 46 8C 10 00 00 57 41 56 45 66 6D 74 20 RIFF.... WAVEfmt
00000010: 1A 00 00 00 4F 67 01 00 44 AC 00 00 F8 2A 00 00 ....Og.. D....*..
00000020: 01 00 10 00 08 00 01 02 02 20 31 12 01 20 66 61 ........ . 1.. fa
00000030: 63 74 04 00 00 00 1F 05 00 00 64 61 74 61 52 10 ct...... ..dataR.
00000040: 00 00 4F 67 67 53 00 02 00 00 00 00 00 00 00 00 ..OggS.. ........
00000050: 00 00 00 00 00 00 00 00 B7 8F 12 B0 01 1E 01 76 ........ .......v
00000060: 6F 72 62 69 73 00 00 00 00 01 44 AC 00 00 FF FF orbis... ..D.....
00000070: FF FF 0F FA 00 00 FF FF FF FF B8 01 4F 67 67 53 ........ ....OggS
00000080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 ........ ........
00000090: 00 00 7D 31 CB 1F 0F 46 FF FF FF FF FF FF FF FF ..}1...F ........
000000A0: FF FF FF FF FF DE 03 76 6F 72 62 69 73 20 00 00 .......v orbis ..
000000B0: 00 58 69 70 68 6F 70 68 6F 72 75 73 20 6C 69 62 .Xiphoph orus lib
000000C0: 56 6F 72 62 69 73 20 49 20 32 30 30 31 31 32 33 Vorbis I 2001123
000000D0: 31 01 00 00 00 12 00 00 00 45 4E 43 4F 44 45 52 1....... .ENCODER
000000E0: 3D 76 6F 72 62 69 73 2E 61 63 6D 01 05 76 6F 72 =vorbis. acm..vor
000000F0: 62 69 73 25 42 43 56 01 00 40 00 00 80 60 DA 11 bis%BCV. .@...`..
00000100: 05 36 C5 A4 94 52 9E 71 58 2A 29 3A E5 A4 94 52 .6...R.q X*):...R
00000110: B2 C3 22 3B 4D CA 27 A5 94 52 4A 29 A5 7C 52 CA ..";M.'. .RJ).|R.
00000120: 18 63 8C 31 82 D0 90 55 00 00 10 00 00 41 0C 65 .c.1...U .....A.e
00000130: 06 59 C9 1C 17 5F 83 46 0C 75 06 59 C9 1C 17 DF .Y..._.F .u.Y....
00000140: 7B 89 90 A2 4A 39 0C A1 05 21 84 F0 A5 02 9B 3A {...J9.. .!.....:
00000150: 10 2E 05 21 84 20 34 64 15 00 00 08 00 C0 20 84 ...!. 4d ...... .
00000160: 10 42 08 21 85 14 52 48 21 85 14 62 88 21 86 18 .B.!..RH !..b.!..
Do you see what I see?
If you wanted to play this, I would suggest stripping off the first 68 bytes.
You will then have a standard Ogg Vorbis file.
Erik
--
+-----------------------------------------------------------+
Erik de Castro Lopo nospam(a)mega-nerd.com (Yes it's valid)
+-----------------------------------------------------------+
"I once worked for a company where as part of the BS5750 "Quality"
process I attended a meeting where I was informed that it was Company
Policy not to use free software. When I asked him for his written
authorisation for me to remove X Windows from our Sun workstations,
he backtracked." -- Phil Hunt