Speccy #05 30 апреля 1996

Звук     Железо

Authoring - schema Sound Drive V1.02 and Covox.

     Authoring


 If you already posmoreli section
"MUZOBOZ" (and if not, then
look), it probably drew
attention to the musical demonstrations sent to the journal 
group FLASH from the city Novosibirsk.


 In the final sections of these
demonstrations, many have heard
a profound silence. To
your computer gave pretty
Sounds require additional
device, developed by
implemented a talent not deprived people in this group.

 It should be noted that the residents
Novosibirsk has done a great contribution to the dissemination 
of ZX-Spectrum'a in our country.

One of the first computers
appeared in Chelyabinsk was
made to "Novosibirsk"
scheme. The first tape of the program, for example GENS, MONS 
with help'om in Russian also received

from Novosibirsk.
Software package from Novosibirsk
supply and one of the first cultivated by our industry computer 
Spektr. No wonder all the same Novosibirsk is considered the 
intellectual center of Russia.  And now, after a lyrical 
digression, we return to Review of what has made

Group FLASH.

 As you know, music coprocessor AY-8910 (8912) has 16
stepped to - analog
converter (DAC), t.e.amplitudu (volume) of the output signal 
can be adjusted by four bits of the registers. On any of the 
channels can be apply the noise, but with the same with

tone громкостью.Программировать
only three at a time
sounding instrumenta.Konechno these
constraints prevent a serious piece of music.

FLASH inc developed hardware
device that allows
play digital music with very good quality.
 Attempts to play digital music on Spectrum'e were
before.
 For example using the program
DIGITAL STUDIO, you can create
melody of digitized instruments and play it through
The same musical coprocessor
using it as a four-digit DAC. But the quality of tunes
this case leaves much to be
desired. On computers in the PROFI
1993-95's popularity had COVOX, which is connected via the 
printer port and had an eight-bit DAC. But

because of the lack of programs that allow users to make the 
melody (musical editor), he found a fairly wide application.


 The editorial board has received from
FLASH two musical groups
demonstrate that given
description of the two devices that allow playback digitized
music. The first device -
- SOUNDRIVE 1.02.
Description of this device did
MICHAEL AMADEUS WAKSON. Edition
apologizes to the authors for
intrusion into their program.
 The reason for the invasion is very simple
- The program nebylo exit to DOS
and associate it with the shell of the journal so that readers 
were convenient, other methods are not

happened.

 Before the advent SOUND BLASTERA on
IBM to play music
used COVOX, which
connects to the printer and
is a set of
resistors. Playback quality of this device was
incomparably higher than that of single-bit dinamika.Podobnoe 
device with respect to ZX-Spectrum, developed and tested

Group FLASH, describes Astafyev
Alex (ALEX RAIDER). Device
authors called D-A CONVERTER 2
IN PRINTER PORT.

Despite the fact that the application
digitized instruments gives the music a good
quality, there is this method and
significant drawbacks.

 1. Very large memory
 required for data storage.

 2. Because Z-80 processor is busy
 only music playback
 then perform any other
 action without losing quality
 Playback can not.

 3. To write music is Vatel need digitized rumenty inst. 
Synthesis tools  very difficult.


 I would also like to draw attention
programmers on the following:
 I have three computers PROFI
I / O port (USER'S PORT)
1F, 3F, 5F, RUS-7F. In addition,
the users are and dual eight-TsAP'y,
who use the ports 3F and 5F
Requires a good musical
Editor-in order to take full
advantage of this hardware.

 It would be nice if any living creature designed and ADC with 
the appropriate software for digitizing instruments. 

 And the last.
 Very good effect is obtained by writing the music for
two computers syncing their work via a tape recorder.
 I would like to hear from experts on the hardware of the 
possibility of connection of several co-processors to a single 
computer. 

 The editors thank all of the
FLASH Group for providing
material.


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