BOSS RSD 10 SERVICE NOTES

Page 2

RSD-10 APR. 1986

CIRCUIT DESCRIPTIONS

Although the RSD»10 has both sampler and delay capa-
bilies, the following description mainly concentrates on
sampler feature, assuming that most of readers are
familar with the basic of digital delay circuit which is
well explained on the service notes of Roland SDE-
1000/3000, BOSS DE-2, etc.

[SAMPLER RECORDING MODE Fig. 1 J

The input audio signal coming into S/H (lCI pins 1 and
3 of Sub board) is passed onto the next stage on a
TRIGGER pulse (RECORDING START, causing COST)
which enables the Main Controller ICQ to start timing
the recording circuits. The trigger pulse is derived from:
Input audio signal proper-in MODE IE (Auto
Recording mode)
or
External control signal (keyboard, pad or peda|)-in
MODE (Manual Recording mode)
Upon receiving a RECORDING START (COST) signal
through Counter Start/Stop Controller (detailed in
COUNTER START/STOP section), the Main Controller
IC9 cordinates the following processes on the audio
input signal. The processing timing being based on the
master clock, which in turn is controlled from Keyboard
Interface. See these sections for detail.

Sample and Hold circuit for extracting an instantane-
ous amplitude of the audio signal

Analog-to-Digital Converter (ADC) for obtaining the
numerical data to the audio amplitude in PCM form.

Storing of the PCM data into the RAMs ICII - ICIB
for later retrieval

RSD-lOlifi-VffifififiEft Missaléefia'cwsso
§m&?4 1/4 fifiEICOLTIit fizfififiaoa-Ex/
-r(soI~:1000/3000. BOSS DE-ZOOt R0137
1800 maHamian'cmea-o'calfibrTéw

ccauayiflfiafilz omftflfimfibafi'o

Ivyvaaanaoms Fig.1 J
INPUT 9» 1 aaxeikjjamdaematlc A/D/AIEIES
S/H Icnuienrwébi. I val-5% (flax a ~ Have)
MM Bummer. anmfiolmalfiblfi L ease.

I Ufil§%(fi%x5- I~I§% > It.
©E- I'I( Emfi%)®i5%
eaMuIaem We a n z...

©«E- l~®(-T-ibfi%)®i%fi
M95533 7 l U7\73( $-rl"i- Ft A"? R \°5"/V
4:8)70115IFénéo

r Ufilavnebifiseekjalaveza.

' S/HEWlflrlfifiifixmfién
oA/D:V/\~5'62ifi®7-7ICE&$2L6 (PCM)°
ORANIC11~16)Icgariéinzm7
CflEIiKTX/i V:I/ l~ D-fiICiOTfiilfifilént %®
514 i Viltamtf M 757-7; -zl§llt§7b>ea>t°y
e: y I~ u-Mgfi-Icioffitwlonido

«setups-9

ICI7I®
PAD
INTERFACE

E _> TRIG.

RHYTHM MACHINE

SUB BOARD

BLOCK DIAGRAM -SAMPLER RECORDING MODE Q, 1, fl,
' '''''''''''''''''' ' ._ I / IA CON ER ER I
I
09 um V ? FEEDBACK/OVERDUE I I my
' I ICIZ
) one [(2 3/ Q1 I MAIN ICU,
LEVEL
| OVERLOAD |->¢rf r __ .... ©_____V::;/EL lCla lm© a Wm 3:)Dm CONTROLLER MEMOR
- l RAM
a m I EXPANDER ' INPUT EMPHASIs I IcoUNYER £333»: I 3)
. , . , Mscx cost How Inn
0 I04 Ol5~017 . . cum" 3 PW i J I
4068:" AID/A H L VGA I - T M
g, .20... mx oouvsm'en l I ® AUTO REC 03 memo:
Ica - oIol lo: 415 7" Icéh roam: REC LED
"WI M mm "2" f _.> MAStER H IC7c® lCflc® |c7.® mm
use ¢ <- commmk m wad . LEI o ,C,w® CLOCK Icm.@ m 8 :24 1M
lea-Ion, ,. _ 35.1615". 1 m 0 MODE 35 couana
KEVBOARD "33' 3 021 j I v I o_ 32 III d, W ICSc® START/STOP Icsc.
pnr MIX xevemaol- ' ovuAuIcs : DELAY III d CONTROLLER IC7c.
C INYERFACE l I sEIIson ; o- 125 Mon: OPEN)" swear
195 I. L ...... ....I' 0-500 J (5.0550,,F $1} ONO Tc INCASE oFIEIMoDE-> ICXb® <24
CONTROL MODE MODE
:/0- 2000 ms __ Ics® SIGNAL IKI
cournm. PAD MERHCE vm VR' o-E AUTO REC/PLAY El 10H I.ICI3,I4L02I:
Ics |C6e ICII PLAVBACK 0-. ""UL EC/L" SMAPLER 345%; M _D KEVBOARD i IC6b® INcAsEoFIEIMooe
on av 06-09 gram - # O-ITRIG PLAY MODE INTERFACE I mucosa
UV "- ICIo ~ IC13 KEVIOARD (RECORDING START Pulu!
"6 DELAY TIME VEGA PL" [Ems/mm ,
(DP-2) FINE/PITCH RANGE/MODE
Ext. MPLED o no I
CONTROL E SA 3 U D GITAL SIGNAL

MT BOARD

-> SAMPLED SOUND ANALOG SIGNAL

-I> CONTROL SIGNAL

[SAMPLER PLAYBACK MODE Fig. 2 I

There are combinations in sampler playback mode:
modes I, and (TRIG) or (GATE)with dif-
ferent control inputs. Of these variations the following
two combinations are discussed in this section:

MODE (E) with 3 Dynamics keyboard control
MODE .with a Pad or Pedal control

MODL D \.MIII 2: Dymumrzs, Kuyhoarrl Control

A keyboard audio input is converted into the three

signals at the Keyboard Interface (refer to KEYBOARD

INTERFACE for detail).

TRIGGER Pulse

........ Starts sampler playback circuitry (de-
tailed in COUNTER START/ STOP
CONTROLLER)

VOLUME CONTROL Signal

........ Determines the level of the sampled
sound through Dynamic Sensor IC3
(detailed in DYNAMICS SENSOR)

PITCH CONTROL Signal

........ Controls the rate of memory accessing
(and D/A, S/H) timing of the Main
Controller ICQ through the Master Clock
GENERATOR I010. The resultant effect
is a shift of sampled sound pitch.
Also used for PLAYBACK TRIM (de-
tailed in PLAYBACK TRIM section)

levvaniasoms Fig.2 I
fii-e- Flu: l~ I) fifiit- HI» I» E) Elf- I-
fiétf- HIE) ébffibiflo

a: ccliFaEzmccwtfisiso

. 54 1r i 7xfi't-rfi- FICiZ7§0J(%- Flfilmifié)

. ""9 FXIiNW'II/ICJ: 660) (E- Image)

7(737xfii¥miihli$¥fl§3fiCMODE D)

t-rfi- |~;b>150)7l'-?4fl§%lit =l=-rI'?- F4 V5-

7; -z-��31§§®{§%lc£§éni?o

. r UfiIEvg- - VVTifiifilIFExi-béfiéo

0d-��U9AZV|~D-JVI§% - IC3 (541-i7xt
V?)%fifl?é$m;bvyfuyf
anfieamaes

. 69-7-2 y |~ n-MEE; - xx: umrcaansan'cmz.
'1'ny V7'fi-7- amfiam LEKE
RIMES.) Oi D. vvf') Vifiwfa
Eéififlfilsés