DVSM - Revision history

>Atari74user at 20:05, 25 March 2016

2016-03-25T20:05:38Z

← Older revision		Revision as of 16:05, 25 March 2016
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	The DVSM ~~Sample File Format~~ was introduced by Andreas Binner along with WinRec in approximately 1994. Again, predominantly an Atari ~~Sample File Format~~.		The DVSM sample file format was introduced by Andreas Binner along with WinRec in approximately 1994. Again, predominantly an Atari sample file format.

>Atari74user at 19:48, 25 March 2016

2016-03-25T19:48:28Z

← Older revision		Revision as of 15:48, 25 March 2016
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	~~extensions~~ blocks		Extension blocks

	DVS is modular format. The minimal header (16 bytes, see above) could followed by		DVS is modular format. The minimal header (16 bytes, see above) could followed by
	free extensions blocks. These blocks are a part of the header and the entry 'headlen'		free extensions blocks. These blocks are a part of the header and the entry 'headlen'
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	~~cookie Lenght~~ of the data ~~Usage~~		Cookie Length of the data usage

	'CLCK' 1 word 0: intern clock, 1: extern CD, 2: extern DAT		'CLCK' 1 word 0: intern clock, 1: extern CD, 2: extern DAT
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	~~karaoke~~ text format		Karaoke text format

	long cookie='KARA'		long cookie='KARA'
Line 88:		Line 89:
	int textlen		int textlen

	~~followed~~ by the text ('textlen' bytes) in standard ASCII format. After this the extension included		Followed by the text ('textlen' bytes) in standard ASCII format. After this the extension included
	a measure table, with a long word (4 byte) for every word in the text. The long word contains		a measure table, with a long word (4 byte) for every word in the text. The long word contains
	the time distance to the next word in 1/sampling frequency		the time distance to the next word in 1/sampling frequency


	~~deltapack~~ format		Deltapack format

	(at the moment only for 16 Bit stereo or mono samples!!!!)		(at the moment only for 16 Bit stereo or mono samples!!!!)
Line 119:		Line 120:
	The table has (logically) the length of 256 bytes.		The table has (logically) the length of 256 bytes.

	~~voicepack~~ format
			Voicepack format

	(at the moment only for 16 Bit stereo or mono samples!!!!)		(at the moment only for 16 Bit stereo or mono samples!!!!)

	a block looks (for stereo) like this (length 'blocklen'):		A block looks (for stereo) like this (length 'blocklen'):

	1. sound word left (16 Bit)		1. sound word left (16 Bit)

>Atari74user at 23:28, 23 March 2016

2016-03-23T23:28:12Z

← Older revision		Revision as of 19:28, 23 March 2016
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	The DVSM Sample File Format was introduced by Andreas Binner along with WinRec in approximately 1994.		The DVSM Sample File Format was introduced by Andreas Binner along with WinRec in approximately 1994. Again, predominantly an Atari Sample File Format.

>Atari74user at 00:01, 21 March 2016

2016-03-21T00:01:05Z

← Older revision		Revision as of 20:01, 20 March 2016
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	Andreas Binner		Andreas Binner


			Back to [[Sample File Formats (Audio)]]

>Atari74user at 18:42, 19 March 2016

2016-03-19T18:42:22Z

← Older revision		Revision as of 14:42, 19 March 2016
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	DVSM Sample File Format was introduced by Andreas Binner along with WinRec in approximately 1994.		The DVSM Sample File Format was introduced by Andreas Binner along with WinRec in approximately 1994.

>Atari74user at 17:14, 19 March 2016

2016-03-19T17:14:55Z

← Older revision		Revision as of 13:14, 19 March 2016
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	DVSM Samples		DVSM Samples

	Every DVS sample begins with the following header:		Every DVS sample begins with the following header:

>Atari74user at 17:14, 19 March 2016

2016-03-19T17:14:27Z

← Older revision		Revision as of 13:14, 19 March 2016
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	DVSM Sample File Format was introduced by Andreas Binner along with WinRec in approximately 1994.		DVSM Sample File Format was introduced by Andreas Binner along with WinRec in approximately 1994.


	The following is taken from (Andreas Binner) WinRec documentation.		The following is taken from (Andreas Binner) WinRec documentation.


	DVSM Samples		DVSM Samples

>Atari74user: Created page with "DVSM Sample File Format was introduced by Andreas Binner along with WinRec in approximately 1994. The following is taken from (Andreas Binner) WinRec documentation. DVSM Sample..."

2016-03-19T17:12:35Z

Created page with "DVSM Sample File Format was introduced by Andreas Binner along with WinRec in approximately 1994. The following is taken from (Andreas Binner) WinRec documentation. DVSM Sample..."

New page

DVSM Sample File Format was introduced by Andreas Binner along with WinRec in approximately 1994.

The following is taken from (Andreas Binner) WinRec documentation.

DVSM Samples
Every DVS sample begins with the following header:

typedef struct
< char magic[6];
int headlen;
unsigned int freq;
char pack;
char mode;
long blocklen;
> DVSMHEAD;
magic:
"DVSM\0\0"
headlen:
header length = distance of the sound data from the start of file
Please use this entry to skip extension blocks (see below). The header length
has to be a even value!
freq:
sampling frequency:
0-7 : allowed CODEC frequencies (0: 8kHz ... 7: 49kHz)
>256: sampling frequency in Hz
pack:
0: ungepacked data
2: DVS delta packed data
4: DVS voice packed data (only WinRec Pro)
5: ADPCM (only WinRec Pro)
In future other values are possible. So test for 'pack==x' and NOT for 'pack>0'
mode:
Bit 0: 8/16 Bit
Bit 1: Stereo/Mono
blocklen (only valid if 'pack'==2 and 'pack'==4 , at the moment):
Length of a packed block. This is NOT a fixed value. WinRec write different
block lengths, dependent of the used buffer. 'blocklen' has to be an
even number!

extensions blocks
DVS is modular format. The minimal header (16 bytes, see above) could followed by
free extensions blocks. These blocks are a part of the header and the entry 'headlen'
inludes this blocks. So (older) programms can skip this additional information.

A block has the following structure:

4 Byte (cookie) Identify
2 Byte (len) Length
len-6 Bytes Data

WinRec knows (V1.38 and higher) following extensions:

cookie Lenght of the data Usage

'CLCK' 1 word 0: intern clock, 1: extern CD, 2: extern DAT

'PEAK' 4 byte one word for the left and right channel containing the
highest sample value

'DSPE' x bytes DSP program (soundeffect !!) in binary format

'PARA' x bytes x parameters for the sound effect. NOT before the 'DSPE'
block!

'PACK' 128 or 8 bytes Deltapack table for the distance values. Used instead of
the standard table (see below).

'INFO' x bytes info text (e.g. full title)

Not use in WinRec (by now)

'KARA' x Bytes karaoke text (see below)

The maximal header length (all blocks together) is limited to 65535 Bytes. Every programm should parse
the blocks, and decide to use them or not.

karaoke text format

long cookie='KARA'
int len
int textlen

followed by the text ('textlen' bytes) in standard ASCII format. After this the extension included
a measure table, with a long word (4 byte) for every word in the text. The long word contains
the time distance to the next word in 1/sampling frequency

deltapack format

(at the moment only for 16 Bit stereo or mono samples!!!!)

a block looks (for stereo) like this (length 'blocklen'):

1. sound word left (16 Bit)
1. sound word right (16 Bit)
1. distance value left (8 Bit)
1. distance value right (8 Bit)
.
.
.
n. distance value left (8 Bit)
n. distance value right (8 Bit)

The distance values are pointer to a table with 'real'
16 Bit distance values. This table contains functions values of

/ -1.084618362^-x for x<0 (-128 to -1)
f(x)= < 0 for x=0 (0)
\ 1.084618362^x for x>0 (1 to 127)

The table has (logically) the length of 256 bytes.

voicepack format

(at the moment only for 16 Bit stereo or mono samples!!!!)

a block looks (for stereo) like this (length 'blocklen'):

1. sound word left (16 Bit)
1. sound word right (16 Bit)
1. distance value left (4 Bit)
1. distance value right (4 Bit)
.
.
.
n. distance value left (4 Bit)
n. distance value right (4 Bit)

The distance values are pointer to a table with 'real'
16 Bit distance values:

-8192,-4096,-2048,-1024,-512,-256,-64,0,64,256,512,1024,2048,4096,8192

Andreas Binner