Probe House DMA Sample Player
by William Wong, Feb 97
   Probe House Software


WHAT IS IT?
 Probe House DMA Player is a 8/16 bits, mono/stereo DMA sample player
 for the STE, MSTE, TT & Falcon. It's a simple player - just pass it
 some sample & it will play it. No controls to figure out!
 
WHAT SAMPLE FORMAT DOES IT SUPPORT?
 Following audio format are automatically recognised:
 1/ AU  - Next/Sun Audio files ( u-law, 8/16 bits linear).
 2/ AVR - Audio Visual Research ( 8/16 bits linear).
 3/ WAV - Microsoft Wave ( u-law, a-law, 8/16 bits linear).
 4/ SND - Sound file (8/16 bits linear).
 5/ AIF - SGI/Apple IIF uncompressed (8/16 bits).
 6/ IFF - AMIGA IIF uncompressed (8/16 bits).
 7/ VOC - PC SoundBlaster uncompressed (8/16 bits).
 8/ RAW - any data files: default to 8 bits, 8KHz & Mono.

 Mono/stereo samples are support for all known formats. 

WHAT PLAYBACK SPEED/FREQUENCY DOES IT SUPPORT?
 All the popular playback speed are supported. PH Player preprocess the
 sample for speed adjustment before playing. This incur some delay before 
 playing the sample. However, playback will suffer no delay.
 
 The table below shows the sample speed and PH Player playback speed.
 There are some error due to non standard DMA speed.
 
  SAMPLE  PHPLAYER  %ERROR
   5500    5563      1.14
   6258    6258      0.00
   7333    7510      2.41
   8000    8344      4.30
   11025   11125     0.91
   12516   12516     0.00
   16000   16689     4.30
   18900   18775     0.66
   22150   22251     0.46
   25033   25033     0.00
   32000   33377     4.30
   37800   37550     0.66
   44056   43807     0.56
   44100   43807     0.56
   48000   47980     0.04
   50066   50066     0.00
 

HOW TO USE IT?
 1/ Install it as a desktop icon. 
    To play any sample, just drag the sample file on to it. 
    
 2/ Double click it.
    A dialog will appear. Select load to load your sample using the
    file selector.
    
 3/ Install it as a viewer for another program (eg. CAB).
    
 It will play the sample without displaying any output onto the screen
 on all of the 3 methods.
 
ALL THIS FOR FREE?
 Yes... I really like to see more hits on my web page!
 
WHAT ELSE?
 Wave ADPCM support.

DEVELOPEMENT INFO
 This program was created & tested on a Falcon running both single
 tasking (tos 4.04) and multitasking (AES 4.1). Sorry I don't have 
 MagiC so it's not tested ( I don't mind if some kind person donate
 Magic 5 to me :-) ).
 
HISTORY
 Jan 97: 1st release
 Feb 97: multiple frequency support, AIFF data block fix.
 Feb 97: VOC & Amiga IFF support.
 
CONTRIBUTIONS ARE WELCOME
 What can I say, any contributions are welcome. Please send them to
   William Wong
   990 Bendemeer Road
   Singapore 339942
   Republic of Singapore
 
 email: wongck@ti.com
 http : //www.geocities.com/SiliconValley/6880/phsw.html