*** VOC DataType V40.2 ***

                      by Christian Buchner


This  is a VOC datatype loosely based on the example sourcecodes
found  in the OS 3.1 Native Developer Kit.  The example code was
originally  written  by David N.Junod.  All changes were done by
Christian Buchner.


Installation
------------

Copy devs/Datatypes/VOC#? SYS:devs/Datatypes/

Copy classes/Datatypes/voc.datatype SYS:classes/Datatypes/

Now reboot or type "AddDatatypes REFRESH" in a shell.



Hardware Requirements
---------------------

This datatypes requires an MC68020 CPU or better.



Motivation
----------

This  program  was created due to the lack of a VOC datatype for
the Commodore Amiga. Well, here it is ;-)



Features
--------

* Handles  VOC files with different frequencies in ONE file (the
  datatype   uses  the  highest  frequency  of  all  chunks  and
  resamples all other chunks)

* correctly handles Silence chunks

* locates  the samples in Fast RAM (for V40 sound.datatype only)

* uses  optimized  assembly  routines  for  sample conversion in
  order to achieve maximum speed



Untested features
-----------------

* handles ExtendedInfo chunks

* Stereo  VOC files will be mixed to Mono (sound.datatype is not
  able to handle Stereo sounds)


I am missing a good documentation on these features and I do not
own  any VOC samples using them.  So if you have any information
and/or samples that might help me, please send it all to me (see
address below).



Unknown features
----------------

* also called bugs:  Please report them to me immediately and if
  possible send me the VOC files that cause the problems.



Future enhancements
-------------------

* implement looping

* implement different decompression methods

* implement frequency fallback in low-memory situations

* implement normalization (scaling to full 8 bit signal range)

* implement a partial loading system to save memory
  especially while loading large samples

* limit maximum replay frequency according to the computer
  system (ECS/AGA) and do a frequency downscaling if necessary



Future projects
---------------

Well, I don't know. Suggest something ;-)

Or send me the specs of a sound standard you want a datatype for
(see address below!)



The Author
----------

Report bugs, comments or anything else to....

Christian Buchner
Ganghoferstraße 2
82110 Germering
Germany
Tel.: +49-89-844872

EMAIL: flowerp@eikon.e-technik.tu-muenchen.de

<flowerp> on irc #amiga and #amigager

  //
\X/ Flowerpower