DG Computer SW from Cassettes
recieved Sept 17 2012
compiled by  Greg "Pete" Peterson in 2012 from (digital) audio cassettes

Each entry below is a folder with a .WAV file and a .PK file, for each
side of the cassette (A side, B side).  The following description is by
Pete:

I have a pair of Nakamichi cassette tape recorders. I put the DG tape in the Nakamichi, that feeds through
a McIntosh tube preamp. I take the signal out of the Preamp to a
small mixing console. The mixing console feeds an Edirol
UA-1000 audio sampler, a 1 inch rack mount unit, intended for a studio audio
rack. [It's of] musician quality, way beyond Soundblaster [audio] 
computer boards. 

The Edirol outputs a USB stream to a small
lunchbox size computer running Windows XP. Audio is sampled and
captured with a computer program by Adobe called "Audition".
I like this program as it allows me to edit the captured waveform
if necessary, so I can put in standard lead in and lead out silences
etc. I also use the standard CD sampling rate so the CD is compatible with all commercial players. - Pete

".pk" files, according to Adobe, "...are files that Audition creates upon first
opening an audio file, and they contain information about the way it's displayed
on the screen." Other sources identfy Audition as formerly "Cool Edit Pro 2.1".

According to Windows XP, the .wav files have these features:

bit rate 1411kbps
sample size 16 bits
2 channels
audio sample rate 44kHz
audio format PCM

I don't know if both channels have the same audio, the original of course
was NOT stereo or two-channels. - Herb

Digital Group folder
=====================

48KCPM
60 K CPM Cbios
6502 OS
8080 OS Hex
8080 OS Octal
ASSM II 9-77
ASSM II for TVC 64
Alignment Tape
Assembler 2 & Printer, Printer Source
Assembler Rev 1 Copy 2
Assembler Time Routines
Basic Files
CPM Loaders
DG Floppy Disk Op Sys V 1.0
DG Printer Routines
Dot Printer Assembler Source Files
EXT Z80 Assm
Games
Library Tape
Maxi Basic 32 & 64
New Dis-assembler
New Floppy Test Routines
PT Basic - 3 Copies
Printer Basic
Printer Font Table
Printer Maxi Basic V 1
Printer Source
Revised Printer Routines
Roman Numeral
Software Uart
TVT
The Digital Group Z-80 Oper System
Unknown 1
Unknown 10
Unknown 11
Unknown 12
Unknown 2
Unknown 3
Unknown 4
Unknown 5
Unknown 6
Unknown 7
Unknown 9
Z-80 Assembler Rev 2
Z-80 Classy Editor
Z80 Assembler
Z80 Assembler Rev 1
Z80 Assmb II Latest version
Z80 Dis assembler
Z80 PT Basic, Focal, Scelbal


Don Tarbell folder
==================

 8K Basic V3.2
 Tarbell Sync Stream

Unknown Format folder
======================

 Altair Extended Basic V 4 Mar 77 2400-1850 Hz

- end 

Herb Johnson Sept 17 2012