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ALESIS
M20
System Exclusive
Fourth Revision
August 5, 1999
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ALESIS PDAT SYSTEM EXCLUSIVE
The PDAT responds to all Alesis system exclusive ADAT commands, as well as MIDI Machine Control (MMC)
commands. In addition, the PDAT also responds to and sends out Alesis system exclusive PDAT commands to access
functions that may or may not be addressed by PDAT or MMC commands.
Note: There may be some overlap in commands. For example, setting a locate address may be done using MMC,
ADAT Sysex or PDAT Sysex commands.
The PDAT has the following MIDI System Exclusive format:
F0H Start-of-Exclusive
00H 00H 0EH Alesis manufacturer ID
16H PDAT product ID
aaH Device id# (0..7EH, 7FH=all)
bbH Opcode (0..7FH)
data Data
F7H End-of-Exclusive
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OPCODES
Note: 1) Items in parentheses,{}, can be repeated multiple times
2) Items in square brackets, [], are optional, depending upon preceding info
01H - Write Parameter
F0H 00H 00H 0EH 16H <dev#> 01H {<param#> [<sub-param>] <data>} F7H
<param> - If = 0, then function bit to follow in sub-param position
- If <> 0, then this value is the user parameter number
<sub-param> - User bit parameter (range 0..13h)
<data> - For User Parameters, see Parameter Table
- For Sub-Parameters, 0=disabled and 7Fh=enabled
Parameters (general user parameters)
See Table 1
Sub-Parameters (user function bit parameters)
00 All Safe Enable
01 All Input Enable
02 Auto Input Enable
03 Auto Play Enable
04 Rehearse Enable
05 Online Enable
06 Auto AUX Routing Enable
07 Format Safe Enable
08 Format Enable
08 SMPTE Chase Enable
0A Internal Generator Enable
0B Tape Offset Enable
0C Track Delay Enable
0D Pre-Roll Enable
0E Post-Roll Enable
0F Auto Return Enable
10 Auto Record Enable
11 Fast Wind Mode Enable
12 Mute Audio Enable
13 CADI Connect Status (1=connected)
02H - Read Parameter
F0H 00H 00H 0EH 16H <dev#> 02H 06H {<param#> [<sub-param>]} F7H
<param> - 00 = bit parameter to follow in sub-param position
Response:
F0 00 00 0E 16 <dev#> 02H 07H {<param#> [<sub-param>] <data>} F7
03H - Jog Command
F0H 00H 00H 0EH 16H <dev#> 03H <data-1> <data-2> F7H
<data-1> - 000000ba a = jog speed<7>, b = direction (0=fwd, 1=rew)
<data-2> - jog speed<6..0>
04H - Control Pause Tension
F0H 00H 00H 0EH 16H <dev#> 04H F7H
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05H - Search Switch Toggle
F0H 00H 00H 0EH 16H <dev#> 05H <data> F7H
<data> - search switch status (0=disable, 7Fh=enable)
06H - Master Search Mode
F0H 00H 00H 0EH 16H <dev#> 06H <data> F7H
<data> - master search mode status (0=master not in search mode, 7Fh=master in search mode)
Information Query/Response Commands
07H - PDAT Software Version Inquiry
F0H 00H 00H 0EH 16H <dev#> 07H F7H
• Request PDAT software version
Note: For compatibility purposes, the PDAT also responds to the ADAT software version request with its ADAT
software version equivalent (currently 4.03).
Response: F0 00 00 0E 14 <dev> 44 <versionH> <versionL> F7
<versionH> - 0aaaaaaa = integer part (0..99)
<versionL> - 0bbbbbbb = fractional part (0..99)
08H - PDAT Miscellaneous Info
F0H 00H 00H 0EH 16H <dev#> 08H 06H F7H
• Request miscellaneous PDAT information
Response: F0 00 00 0E 16 00 08H 07H <data-1> <data-2> F7
<data-1> = 0gfedcba where a = AUX record track status
d = TC Track input track status
e = Online ADAT slave status
f = Transport/system error status
g = Transport task active status
<data-2> = 000000ba where a = Digital input presence
09H - Slave Query
F0H 00H 00H 0EH 16H <dev#> 09H 06H F7H
• Request number of ADATs connected
Response: F0 00 00 0E 16 00 09H 07H <# of ADATs> F7
<# of ADATs> - 0..16
0AH - Timecode Query
F0H 00H 00H 0EH 16H <dev#> 0AH 06H <type> F7H
<type> - 0 = Search Master TC Request search master resting timecode
<type> - 1 = Tape TC Request tape tc (TC Track) timecode
b = AUX input track status
c = TC Track record track status
b = I/O card presence
Response: F0 00 00 0E 16 <dev#> 0AH 07H <type> <timecode>F7
<type> = same as requested
<timecode> =32-bit timecode converted to 7-bit MIDI data bytes
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Data Transfer Commands
10H - MIDI Sysex Dump
F0H 00H 00H 0EH 16H <dev#> 10H 06H <type> F7H
<type> - 0 = all
• Request dump of all user parameters
Response: F0 00 00 0E 16 <dev#> 10H 07H <type> <byte count> <data>F7
<type> - 0 (complete user parameter dump = 1964 data bytes)
<data> - 8 MIDI data bytes output for every 7 data bytes
a7 a6 a5 a4 a3 a2 a1 a0 transfer as 00 a6 a5 a4 a3 a2 a1 a0
b7 b6 b5 b4 b3 b2 b1 b0 00 b5 b4 b3 b2 b1 b0 a7
c7 c6 c5 c4 c3 c2 c1 c0 00 c4 c3 c2 c1 c0 b7 b6
d7 d6 d5 d4 d3 d2 d1 d0 00 d3 d2 d1 d0 c7 c6 c5
e7 e6 e5 e4 e3 e2 e1 e0 0 e2 e1 e0 d7 d6 d5 d4
f7 f6 f5 f4 f3 f2 f1 f0 0 f1 f0 e7 e6 e5 e4 e3
g7 g6 g5 g4 g3 g2 g1 g0 0 g0 f7 f6 f5 f4 f3 f2
11H - MIDI Software Dump
F0H 00H 00H 0EH 16H <dev#> 11H <type> [data] F7H
<dev#> always = 7FH
<type> can be:
0 4 Meg Flash Boot segment data without interleaved checksum
1 4 Meg Flash Code segment data without interleaved checksum
2 4 Meg Flash Boot segment data with interleaved checksum
3 4 Meg Flash Code segment data with interleaved checksum
4 8 Meg Flash Boot segment data without interleaved checksum
5 8 Meg Flash Code segment data without interleaved checksum
6 8 Meg Flash Boot segment data with interleaved checksum
7 8 Meg Flash Code segment data with interleaved checksum
0 g7 g6 g5 g4 g3 g2 g1
If <type> is 0,1,4, or 5 (data without interleaved checksum) then [data] is:
<#data bytes> <24 Bit Address> <data byte 1> .. <data byte N>
.. .. .. ..
<#data bytes = 2> <24 Bit Address = 0> <checksum word>
where:
<#data bytes> is sent as a single byte greater than 0 but less than 128.
<24 Bit Address> is sent as 6 nibble-ized data bytes. For example, address 123456H is sent as
01H 02H 03H 04H 05H 06H. MSB first.
<data byte> is sent as 2 nibble-ized data bytes. For example, data 98H is sent as 09H 08H.
MSB first. <data byte> is repeated for <#data bytes>.
<checksum word> is sent as 4 nibble-ized total checksum bytes. Note <#data bytes> must equal
2. <24 Bit Address> must equal 0.
Repeat the <#data bytes> <24 Bit Address> <data byte 1> .. <data byte N> sequence for programming of
additional flash locations. Note that the <24 Bit Address> specifies the start of programming location for
the specified <data byte>’s. Always complete the end of the transmission with the checksum sequence
above.
If <type> is 2,3,6, or 7 (data with interleaved checksum) then [data] is:
<#data bytes> <24 Bit Address> <data byte 1> .. <data byte N> <checksum>
.. .. .. .. ..
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<#data bytes> <24 Bit Address> <data byte 1> .. <data byte N> <checksum>
where:
Repeat the <#data bytes> <24 Bit Address> <data byte 1> .. <data byte N> <checksum> sequence for
programming of additional flash locations. Note that the <24 Bit Address> specifies the start of
programming location for the specified <data byte>’s.
12H - Tape Data
F0H 00H 00H 0EH 16H <dev#> 12H <type> F7H
<dev#> device
<type> can be:
0 Prepare data to save to tape
1 Initiate a save data to tape
<#data bytes> is sent as a single byte greater than 0 but less than 128.
<24 Bit Address> is sent as 6 nibble-ized data bytes. For example, address 123456H is sent as
01H 02H 03H 04H 05H 06H. MSB first.
<data byte> is sent as 2 nibble-ized data bytes. For example, data 98H is sent as 09H 08H.
MSB first. <data byte> is repeated for <#data bytes>.
<checksum> is sent as 2 nibble-ized checksum bytes.
The checksum is the sum of the previous <data byte> sequence mod 256.
Action Commands
16H - Locate
F0H 00H 00H 0EH 16H <dev#> 16H <loc#> F7H
<loc#> - 0..99=locate 0.. locate 99
17H - Inject Tape
F0H 00H 00H 0EH 16H <dev#> 17H F7H
18H - Enter Deck Standby
F0H 00H 00H 0EH 16H <dev#> 18H F7H
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Parameter Table
..<rt-most>
Parameter Name <param> <data> Comments
VU Peak Hold Mode
1
01h 0..2
0 = No Peak Hold
1 = Momentary
2 = Continuous
VU Peak Hold Time
VU Decay Time
VU Meter Scale
1
1
1
02h 0 .. 99 Amount of time the peak pixel is held on
03h 0 .. 99 Amount of time it takes each VU pixel to decay
04h 0..1
VU meter scale
0 = Normal
1 = Fine dB
VU Fine Headroom
Digital Source
1
05h 2..22 dB Amount of headroom for Fine dB scale
1
06h 0..2
0 = ADAT Optical
1 = Track Copy
2 = I/O Card (only valid if I/O card
detected)
Input Select Bitmap
Analog Routing
2
1
07h bitmap (0=analog input, 1=digital input)
08h 0..2
0 = one-to-one
1 = half and half
2 = odd-even
[1..8 à 1..8]
[1..4 à 5..8]
[chan 1 à 1,3,5,7 and chan 2 à 2,4,6,8]
ADAT Optical Source209h optical source bitmap (1=source channel)
Track Copy Source
AES/EBU Source
AUX Track Source
2
2
2
0Ah track copy source bitmap (1=source channel)
0Bh AES/EBU source bitmap (1=source channel)
0Ch AUX source bitmap (1=source channel)
Pre-Roll Time
Post-Roll Time
Loop Start Point
Loop End Point
Auto Punch-In Point
1
1
1
1
0Dh 0..25
0Eh 0..25
0Fh 0..99 Loop start locate number
10h 0..99 Loop end locate number
1
11h 0..99 Auto Punch-In locate number
Auto Punch-Out Point112h 0..99 Auto Punch-Out locate number
Locate Address 13h <loc #> <32-bit timecode>
<loc #> = 0..99
<32-bit timecode> = MIDI data format 5
Locate Name 14h <loc #> <8-character ASCII>
<loc #> = 0..99
<8-character ASCII> = <left-most>
Format Type
1
15h 0..1
0 = 16-bit
1 = 20-bit
Track Delay Value
3
16h [<track #> <value>]
<track #> = 0..7
<value> = 0..8160 samples
Tape Offset Value
5
17h 32-bit sample
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Parameter Name <param> <data> Comments
When Start Ref = ABS Time, current ABS Time
SMPTE Offset Value
Chase Mode
1
7
18h Signed SMPTE format
19h 0..1
0 = Continuous
1 = Once
Flywheel Amount
2
1Ah 0..150 frames à <msb> <lsb>
# of frames to flywheel when chasing SMPTE
<msb> = 0aaa aaaa (bit 0..6)
<lsb> = 0bbb bbbb (bit 7..13)
Park Ahead
5
1Bh 32-bit timecode (samples) Distance to stop ahead of last good SMPTE In
Internal Gen Mode
1
1Ch 0..1
0 = Free-run
1 = Play/Rec
Int Gen Start Reference11Dh 0..2
0 = ABS Time
1 = TC Track
2 = User Set
Int Gen ABS Offset
6
1Eh 32-bit timecode
Int Gen User Set Start61Fh SMPTE time format
Int Gen User Bits
Varispeed
4
MIDI Device ID
MMC Output
5
20h 8 hex characters
21h -300..200 cents (FED4 ..00C8)
2
0
22h 0..127 (127 = 7Fh = All Call)
23h 0..1
0 = MMC output disabled
1 = MMC output enabled
MTC Output
0
24h 0..1
0 = MTC output disabled
1 = MTC output enabled
Dig Output Format
1
25h 0..3
0 = 20-bit
1 = 16-bit
2 = 16-bit dithered
3 = Dig Thru mode (pass DigIn to DigOut)
One-button Record
0
26h 0..1
0 = One-button record disabled
1 = One-button record enabled
Direct Input Monitor
0
27h 0..1
0 = ADC/DAC
1 = Direct input
TC Output Level
1
28h 0..30 (divide by 10 to get volts)
Fwd/Rew SMPTE Out029h 0..1
0 = SMPTE output in fwd/rew disabled
1 = SMPTE output in fwd/rew enabled
Search Enable Mode
0
2Ah 0..1
0 = Normal
1 = Button only
plus this offset gives the starting timecode
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Parameter Name <param> <data> Comments
1 = Punch from track enable buttons allowed
Locate Before Play
0
2Bh 0..1
0 = Disabled
1 = All slaves located to master before play
Mute Until Locked
0
2Ch 0..1
0 = Each unit unmutes once it is in sync
1 = Units mute until master sees all locked
Dynamic Punch
0
2Dh 0..1
0 = Punch using Play/Record buttons only
Track Group Enable
Unthread Timeout
Crossfade Time
Remote Source
1
1
1
Online Control Mode
Tape Counter Mode
Reference Counter
1
Mode
Clock Source
Sample Rate
SMPTE Rate
1
1
1
0
2Eh 0..1
0 = Track enable group buttons inactive
1 = Track enable group buttons active
2Fh 1..20 minutes
30h 0..31
31h 0..2
0 = ADAT Sync
1 = MIDI
2 = RS-422 (Sony 9-pin protocol)
1
32h 0..1
0 = Remote Only
1 = Remote and Local
1
33h 0..2
0 = SMPTE
1 = ABS Time
2 = RELATIVE
34h 0..4
0 = SMPTE IN
1 = LOC PT
2 = TAPE TC
3 = INT GEN
4 = OFFSET
35h 0..6
0 = Internal
1= Video
2 = ADAT
3 = I/O Card
4 = Word
5 = SMPTE
6 = Optical
36h <0..3> range 0..1 (0=48K, 1=44.1K)
<4..7> range 0..2 (0=no pull-up/down,
1=pull-up, 2 = pull-down)
37h 0..5
0 = 24 fps
1 = 25 fps
2 = 29.97 fps
3 = 29.97 DF
4 = 30 fps
5 = 30 DF
Track Enable Group buttons are on the CADI
This allows the user to select which remote
source is in control when Online is enabled.
This allows the user to select whether front
panel and LRC (both considered Local) are
allowed when Online is enabled.
Displays current SMPTE Input
Displays current locate address
Displays TC Track of loaded tape
Displays the Internal Generator
Displays the SMPTE or Tape Offset
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Parameter Name <param> <data> Comments
Yellow error LED indicates interpolation errors
Timecode Source
1
38h 0..1
0 = Internal
1 = External
Chase Reference
1
39h 0..1
0 = ABS Time
1 = Tape TC Track
Pitch Mode
1
3Ah 0..1
0 = Fixed
1= Variable
RMD Error Enable
0
3Ch 0..1
0 = RMD Error LEDs inactive
1 = RMD Error LEDs active
Digital Scan Enable
0
3Dh 0..1
0 = Digital scan disabled
1 = Digital scan enabled
Digital Scan Level
1
3Eh 0..7
0= -42 dB, 1= -36 dB, 2= -30 dB, 3= -24dB
4= -18 dB, 5= -12 dB, 6= -6 dB, 7= 0 dB
Pseudo Master
1
3Fh 0..15 = device ID of the pseudo master 0 = ID1 = no pseudo master
RS-422 Trk Arm Enable040h 0..1
0 = RS-422 track arming disabled
1 = RS-422 track arming enabled
RS-422 Track Mapping141h 0..1
0=no mapping
1=odd/even
RMD = Remote Meter Bridge
Red error LED indicate transport/system errors
No audio while jog/shuttle
Hear digital audio (scrub) while in jog/shuttle
Ignore RS-422 Edit Preset command
Mapping options for 2-track Edit Preset
1 à 1, 2 à 2
1à 1,3,5,7 and 2 à 2,4,6,8
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MIDI Data Format Types
0 Bit Parameter
- Normal data format: 0 or 1
- MIDI data format: 0 (disabled) or 7Fh (enabled)
1 Byte Parameter with max value less than 80h
- Normal data format: 0 a6 a5 a4 a3 a2 a1 a
0
- MIDI data format: <0 a6 a5 a4 a3 a2 a1 a0>
2 Byte Parameter with max value greater than or equal to 80h
- Normal data format: a7 a6 a5 a4 a3 a2 a1 a
0
- MIDI Data Format: <0 a6 a5 a4 a3 a2 a1 a0> <0 0 0 0 0 0 0 a7>
3 Word Parameter with max value less than 4000h (2
- Normal data format: 0 0 b5 b4 b3 b2 b1 b0 a7 a6 a5 a4 a3 a2 a1 a
14
)
0
- MIDI Data Format: <0 a6 a5 a4 a3 a2 a1 a0> <0 b5 b4 b3 b2 b1 b0 a7>
4 Word Parameter with max value greater than or equal to 4000h (2
- Normal data format: 0 0 b5 b4 b3 b2 b1 b0 a7 a6 a5 a4 a3 a2 a1 a
14
)
0
- MIDI Data Format: <0 a6 a5 a4 a3 a2 a1 a0> <0 b5 b4 b3 b2 b1 b0 a7>
5 Long Parameter
- Normal data format: d7 d6 d5 d4 d3 d2 d1 d0 c7 c6 c5 c4 c3 c2 c1 c0 b7 b6 b5 b4 b3 b2 b1 b0 a7 a6 a5 a4 a3 a2 a1 a
- MIDI Data Format: <0 a6 a5 a4 a3 a2 a1 a
d
>
4
><0 b
0
5 b4 b3 b2 b1 b0 a7
><0 c
4 c3 c2 c1 c0 b7 b6
><0 d
6 SMPTE Parameter
- Normal data format: hr:min:sec:frm
- MIDI Data Format: <hour> <min> <sec> <frm>
<hour> = 000hhhhh range=0..23
<min> = 00mmmmmm range=0..59
<sec> = 00ssssss range=0..59
<frm> = 000fffff range=0..29
7 SMPTE Parameter
- Normal data format: hr:min:sec:frm:sfrm:smp
- MIDI Data Format: <sign/hour> <min> <sec> <frm> <sfrm> <smp>
<sign/hour> = 00shhhhh where s=0: positive, s=1:negative and hhhhh range=0..23
<min> = 00mmmmmm range=0..59
<sec> = 00ssssss range=0..59
<frm> = 000fffff range=0..29
<sfrm> = 0xxxxxxx range=0..99
<smp> = 000yyyyy range=0..19
0
3 d2 d1 d0 c7 c6 c5
><0 0 0 0 d
7 d6 d5
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