• on Audio/Video/Photography
  • Published in issue 2/2000 on page 0
About the article

Parameter box for MIDI software

convenient software synthesizer operation

Parameter box for MIDI software
Using a keyboard and mouse to operate the innumerable knobs and sliders of a PC mixing board can turn playing around with a sound synthesizer into an agonizing experience. With the MIDI parameter box it’s a different story!Almost every PC these days has a sound card. However, most PC users employ it only to reproduce operating system sounds, music from audio CDs and sound effects for games and presentations. They thus use only the standard features of the software for the sound card, even though there are outstanding programs available that allow even non-musicians to exploit the manifold features of modern sound cards. These are sound synthesizer programs.
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Component list
R1,R8 = 1k?5
R2 = 1k?
R3 = 10?
R4,R7,R9-R16 = 10k?
R5,R6 = 220?
P1-P8 = 47k? linear potentiometer
P9 = 470? preset Hi
C1-C8,C10,C11,C12,C14,C18 = 100nF
C9,C13,C17,C19 = 10µF 63V radial
C15,C16 = 33pF
D1,D2 = LED, high efficiency
D3 = 1N4001
T1 = BC547B
IC2 = PIC16F84-10/P (programmed, order code 996521-1)
IC3 = 7805
K1 = 4-way SIL connector
K2 = 2 PCB solder pins
K3,K6 = 10-way SIL connector
K4,K9 = 5-way SIL connector
K5,K10 = 6-way SIL connector
K7 = 15-way Sub-D plug, chassis mount (see text)
K8 = 5-way DIN socket, chassis mount, 180° (see text)
K11 = mains adaptor socket
S1-S8 = pushbutton, 1 make contact
S9-S12 = on/off switch
X1 = 10MHz quartz crystal
Enclosure, e.g. Teko 363 (216x130x77mm)
PCB, order code 990087-1
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