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SOME REAL ApPLICATIONS 751 ANY r NUMBERll OF INPUTS • INPUTS • (MIXER) • ADN ADD N ,--. OUTPUT (D) ADN OUTPUT IIVPUT! I/VPUT2 ••• MIN MAX SIGNAL INPUT TABLE LOOKUP UNIT SIGNAL OUTPUT ADDR DATA TABLE ~ (E) LOOKUP OUTPUT TABLE IIVPUT MIN MAX AMPLITUDE DURI DUR2 DURN '---y--------.J SEGMENT SEG ENVELOPE DURATIONS SIGNAL OUTPUT TABLE AOOR DATA 0SJ I 2 3 TE MPORARY STORAGE ! POINTER IF) SEG OUTPUT AMP TABLE POINTER OUR! OUR2'" Fig. 19-16. Some additional unit generators, (A) FLT output input gain AD A1 A2 B1 B2 T1 T2 T3 T4, (B) SNDFILE output amp increment name channel start end position pointer, (C) Version output amp NFREQ name channel start ENDATT BEGINDK END INTERPSIZ SRA TEORIG FREQORIG T1 T2 T3 T4 T5, (D) ADN output input1 input2 ,.. , (E) Lookup output table input min max. (F) SEG output amp table pointer DUR1 DUR2 """"
752 MUSICAL ApPLICATIONS OF MICROPROCESSORS 1.0 86 ~SOUND ~FILE '--,--,..-----' 1.0 Instrument Definition Statements SET FUNCLENGTH = 8K INS 0 GENFM; {P5=DUR, P6=AMP, P7=PITCH} OSC BI P6 P5 F2 D; (AMP ENVELOPE) OSC B2 1 P5 F3 D; {DEV ENVELOPE} OSC B3 1 P5 F4 D; {MOD FREQ ENVELOPEl OSC B5 B2 B3 Fl D; {MODULATION OSCILLATOR} ADN B6 B5 P7; OSC 87 81 86 Fl D; (CARRIER OSCILLATOR) OUT B7; END; Fig. 19-17. Generalized FM instrument Other unit generators, some of which are diagrammed in Fig. 19-16, use similar statement formats. The FLT generator, for example, is a generalized second-order digital filter (see Chapter 14). It has a signal input and output, both of which are I/O blocks, and five coefficients, which can be any kind of variable or constant. Thus, the filter characteristics can be specified as constants, parameters in note statements, or by other signals via the I/O blocks. Also, since arithmetic expressions are allowed in any of the coefficient fields, the FLT statement may be set up for control in familiar terms such as center frequency and Q factor. FLT also requires four temporary values for the internal delays, which can be set to any specific initial value or allowed to default to zero. SNDFILE is not really a generator at all; it instead reads samples from an existing sound file. The various parameters include an amplitude factor, an increment for the read pointer (which should be 1.0 to read every sample), and starting and ending positions in the file. If more samples are read than exist between start and end positions, the pointer wraps around to the beginning as if the file was a huge waveform table. The
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Musical Applications of Microproces
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© 19B5 by Hayden Books A Division
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serve to acquaint the general reade
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SECfrON II. Computer-Controlled Ana
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17. Digital Hardware 589 AnalogModu
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1 Music Synthesis Principles Creati
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MUSIC SYNTHESIS PRINCIPLES 5 own ar
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MusIC SYNTHESIS PRINCIPLES 7 Increa
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MUSIC SYNTHESIS PRINGPLES 9 VERY SM
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MUSIC SYNTHESIS PRINOPLES 11 repres
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MUSIC SYNTHESIS PRINCIPLES 13 The w
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MUSIC SYNTHESIS PRlNCIPLES 15 was c
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MUSIC SYNTHESIS PRlNOPlES 17 In act
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MUSIC SYNTHESIS PRINCIPLES 19 SIN (
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MUSIC SYNTHESIS PRINCIPLES 21 lILt!
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MUSIC SYNTHESIS PRINCIPLES 23 - ,--
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MUSIC SYNTHESIS PRINOPLES 25 + or--
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MUSIC SYNTHESIS PRINCIPLES 27 Human
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MUSIC SYNTHESIS PRINOPLES 29 fundam
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MUSIC SYNTHESIS PRINCIPLES 31 frequ
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MUSIC SYNTHESIS PRINCIPLES 33 from
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MUSIC SYNTHESIS PRINCIPLES 35 ever,
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MUSIC SYNTHESIS PRINCIPLES 37 have
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MUSIC SYNTHESIS PRINCIPLES 39 No li
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MUSIC SYNTHESIS PRINCIPLES 41 cropr
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44 MUSICAL ApPLICATIONS OF MICROPRO
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60 MUSICAL ApPLICATrONS OF MICROPRO
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68 MUSICAL ApPLICAnONS OF MICROPROC
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82 MUSICAL ApPUCATIONS OF MICROPROC
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84 MUSICAL ApPUCATIONS OF MICROPROC
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vvv·(B) 86 MUSICAL ApPLICATIONS OF
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100 MUSICAL ApPLICAnONS OF MICROPRO
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102 MUSICAL ApPLICATIONS OF MICROPR
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Table 5-1. 6502 Instruction Set Lis
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Coding Table 5-3. 68000 Addressing
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Table 5-4. 68000 Instruction Set Su
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Table 5-4. 68000 Instruction Set Su
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6 BasicAnalogModules Probably the m
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BASIC ANALOG MODULES 179 tage remai
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BASIC ANALOG MODULES 181 Op-amps ma
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BASIC ANALOG MODULES 183 '0: :? u
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BASIC ANALOG MODULES 185 with an id
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BASIC ANALOG MODULES 187 EXPONENTIA
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BASIC ANALOG MODULES 189 (or 0.9766
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BASIC ANALOG MODULES 191 4R Vr'o'M
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BASIC ANALOG MODULES 193 tooth with
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BASIC ANALOG MODULES 195 +IOVrel PU
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BASIC ANALOG MODULES 197 Table 6-1.
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BASIC ANALOG MODULES 199 constants
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BASIC ANALOG MODULES 201 12 ~ E 1-
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BASIC ANALOG MODULES 203 R2 R3 100
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BASIC ANALOG MODULES 205 fore, must
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BASIC ANALOG MODULES 207 For peak p
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BASIC ANALOG MODULES 209 22 pF RI S
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BASIC ANALOG MODULES 211 INPUT~OUTP
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BASIC ANALOG MODULES 213 Voltage-Tu
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BASIC ANALOG MODULES 215 +20 +15 +1
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BASIC ANALOG MODULES 217 100 ko. BA
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BASIC ANALOG MODULES 219 +15 V0----
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Digital-to-Analog and tlnalog-to-Di
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DIGITAL-TO-ANALOG AND ANALOG-TO-DIG
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300 MUSICAl ApPLICATIONS OF MICROPR
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11 CORtrolSequeRce Display andEditi
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CONTROL SEQUENCE DISPLAY AND EDITIN
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SECTIONIII DigitalSynthesis antl So
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Table 12·1. Design Data for Chebys
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~ o Table 12·1. (Cont.) Ripple = 1
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13 Digital Tone Generation Teehniqu
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DIGITAL TONE GENERATION TECHNIQUES
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Sample Number Harm. No. o 2 3 4 5 6
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Sample Spectrum Number 0 1 2 3 4 5
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1,0 0,8 0,6 0.4 0,2 °0 10 12 14 16
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1,o,-----------,----------" Y Ol---
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14 DigitalFiltering In analog synth
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DIGITAL FILTERING 483 Input Samples
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DIGITAL FILTERING 485 the input wav
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DIGITAL FILTERING 487 where 0 is no
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DIGITAL FILTERING 489 BAND REJECT >
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DIGITAL FILTERING 491 Next the inpu
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DIGITAL. FILTERING 493 circuits mak
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DIGITAL FILTERING 495 OUTPUT Fig. 1
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DIGITAL FILTERING 497 INPUT ~8~~~~~
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DIGITAL FILTERING 499 the turnover
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DIGITAL FILTERING 501 frequency is
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+ 3 1 oL-_-...l__---l__---L__---r-_
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DIGITAL FILTERING 505 When programm
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DIGITAL FILTERING 507 lowest freque
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DIGITAL FILTERING 509 Even with a p
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DIGITAL FILTERING 511 OUTPUT Fig. 1
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DIGITAL FILTERING 513 INPUT VARIABL
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DIGITAL FILTERING 515 INPUT (C) -(.
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DIGITAL FILTERING 517 NOTE: Xl, Y,
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DIGITAL FILTERING 519 AMPLITUDE, (d
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DIGITAL FILTERING 521 o ~ -10 ~ -20
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DIGITAL FILTERING 523 1.0 0.8 0.6
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DIGITAL FILTERING 525 When the outp
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16 Source-SignalAnalys,is One of th
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SOURCE-SIGNAL ANALYSIS 545 nOdB T I
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--------, I I ! II i I I I I , , i"
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SOURCE-SIGNAL ANALYSIS 549 3 IN -"
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SOURCE-SIGNAL ANALYSIS 551 Data Rep
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SOURCE-SIGNAL ANALYSIS 553 SIGNAL B
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SOURCE-SIGNAL ANALYSIS 555 -5° FH
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SOURCE-SIGNAL ANALYSIS 557 -5 -10 ~
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SOURCE-SIGNAL ANALYSIS 559 Since th
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SOURCE-SIGNAL ANALYSIS 561 o -5 -10
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SOURCE-SIGNAL ANALYSIS 563 o -5 -10
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SOURCE-SIGNAL ANALYSIS 565 overlapp
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SOURCE-SIGNAL ANALYSIS 567 • ....
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SOURCE-SIGNAL ANALYSIS 569 from an
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SOURCE-SIGNAL ANALYSIS 571 componen
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SOURCE-SIGNAL ANALYSIS 573 and some
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SOURCE-SIGNAL ANALYSIS 575 185491 A
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SOURCE-SIGNAL ANALYSIS 577 SYSTEM F
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SOURCE-SIGNAL ANALYSIS 579 (AI (BI
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SOURCE-SIGNAL ANALYSIS 581 (Gl II'
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SOURCE-SIGNAL ANALYSIS 583 PULSE PE
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SOURCE-SIGNAL ANALYSIS 585 again, t
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SOURCE-SIGNAL ANALYSIS 587 Quite ob
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17 DigitalHardware At this point, w
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DIGITAL HARDWARE 591 Lsa I N+I DIVI
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DIGITAL HARDWARE 593 (~OCK[ L _ LSB
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DIGITAL HARDWARE 595 FREQUENCY CONT
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DIGITAL HARDWARE 597 Fig. 17-7. Pha
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DIGITAL HARDWARE 599 MOST SIGNIFICA
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DIGITAL HARDWARE 601 waveform chang
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DIGITAL HARDWARE 603 As an example,
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DIGITAL HARDWARE 605 1. Sixteen ind
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DIGITAL HARDWARE 607 discussed, the
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DIGITAL HARDWARE 609 between the 41
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DIGITAL HARDWARE 611 8-BIT PORT I M
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FREOUENCY CONTROL IN I I 20 FREOUEN
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DIGITAL HARDWARE 615 TO MULTIPLEXED
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FREQ. :a.-8 CNTL. WRITE FREQ. I 20
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DIGITAL HARDWARE 619 effective freq
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DIGITAL HARDWARE 621 The signal mem
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DIGITAL HARDWARE 623 into a filter
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DIGITAL HARDWARE 625 made using con
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DIGITAL HARDWARE 627 A Hybrid Voice
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DIGITAL HARDWARE 629 o -5 -10 -15 ~
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DIGITAL HARDWARE 631 o -5 -10 -15 ~
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DIGITAL HARDWARE 633 D3 02 01 10 00
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DIGITAL HARDWARE 635 plementers on
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DIGITAL HARDWARE 637 taken care of
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Page 713 and 714: 700 MUSICAL ApPLICATIONS OF MICROPR
Page 718: SECTIONIV ProductApplications andth
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Page 731 and 732: RING MOD VCD A PITCHo--+lcNTL OUT A
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Page 770 and 771: 20 Low-CostSYllthesis Techniques Wh
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Page 792 and 793: 21 Future Frequently, when glvmg ta
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Page 804 and 805: Bibliography The following publicat
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(Communication) Minor - Computer Sc
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newsletter, writing numerous articl
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conversion subsystem, especially if
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In the beginning the company was su
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HAL : I really haven't kept up with
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was clear he was serious, I named m
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influences too like interrupts from
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SONIK : What activities do you do o
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as a homework assignment. So much o
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