Harman Mark Levinson Protocol Series User manual

No512
CD/SACD Player
Serial Protocol

TM
FCC Notice
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
Caution!
Changes or modifications not expressly approved by the party responsible for compliance could
void the user’s authority to operate the equipment.
Canada
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la Classe B est conforme à la norme NMB-003 du Canada.
For customer service and product
shipment information, refer to the
www.marklevinson.com Web site.
Part No. 070-19047|Rev 0 |10/08
Mark Levinson and the Mark Levinson logo are trademarks of Harman
International Industries, Incorporated, in the United States and/or other
countries.
Microsoft and Windows are registered trademarks of Microsoft Corporation in
the United States and/or other countries.
Other company and product names may be trademarks of the respective
companies with which they are associated.
©2008 Harman International Industries, Incorporated. All rights reserved.
This document should not be construed as a commitment on the part of
Harman International Industries, Incorporated. The information it contains is
subject to change without notice. Harman International Industries,
Incorporated assumes no responsibility for errors that may appear within this
document.

Mark Levinson No512 CD/SACD Player Serial Communications Protocol
1Documents 4
1.1 Change List 4
2Definitions, Acronyms, and Abbreviations 4
3General Description 5
3.1 Serial Port and Cable Configuration 5
3.2 Physical Connection Using a RJ-11 Cable 5
4Ethernet Port & Cable Configuration 6
4.1 Physical Connection using Ethernet Cables 6
5Message Formats and Examples 7
5.1 Format of the Message Fields 7
5.2 Incoming Messages 8
5.3 Outgoing Messages 8
5.3.1 RSP – Response to Command Request 8
5.3.2 NTF – Notification of System Action 8
5.4 Example Request - RQST 8
5.5 Example Response - RSP 9
5.6 Example Notification - NTF 9
6RQST Error Responses and Examples 9
7External Protocol Commands 10
7.1 AREA 10
7.2 CONTROL 10
7.3 DRAWER 11
7.4 DSPLY 11
7.5 FPDWNUP 12
7.6 HWSTATUS 12
7.7 IRDWNUP 13
7.8 MSG 14
7.9 MUTE 14
7.10 NOP 14
7.11 PWR 15
7.12 REPEAT 15
7.13 SHUFFLE 16
7.14 TIME 16
7.15 TRACK 17
7.16 VOL 17
7.17 VOLCTL 18
8Notification Factory Defaults 18
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No512 CD/SACD Player Serial Communications Protocol Mark Levinson
1 Documents
The following documents should also be used with this document to understand how this protocol can be
used with the No512 CD/SACD Player.
070-19027 No512 CD/SACD Player Owner’s Manual
1.1 Change List
No changes have been made.
2 Definitions, Acronyms, and Abbreviations
\r represents the ASCII new line control character (0x0D)
: External Protocol String Field Separator
, External Protocol String Field Parameter Separator for multiple parameters
ACK Acknowledge
AV Audio Video System generated response
CMD Command
CS Control Source
EOP End of Packet
HOST The device initiating or receiving the serial communication packets to/from the
player.
ML Mark Levinson
No512 The Mark Levinson product receiving or transmitting the serial communication
packets to/from the HOST.
NAK/NACK No Acknowledge
NTF Notification
PARAM Parameter
RQST Request
RSP Response
SOP Start of Packet
SPG Serial Protocol Guidelines
UI User Interaction
User Parameter A user changeable variable that stores a specific value that describes an
operating condition for the amplifier.
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Mark Levinson No512 CD/SACD Player Serial Communications Protocol
3 General Description
An external host controller can use the external protocol to control the No512 CD/SACD player. The
protocol consists of simple ASCII character set based commands, which are passed to the No512 as
command packets via either RS-232 port or the Ethernet port. The No512 will reply to command packets
with an acknowledgement to signify that the command has been recognized and acted upon.
EXTERNAL
HOST
(Controller)
No512
CD/SACD player
RS232C cable
or Ethernet cable
3.1 Serial Port and Cable Configuration
The RS-232 control is through an RJ-11 connector located on the rear panel of the No512 player. The
pin-out of the RJ-11 connector is:
Pin 2 - Rx from the control device Data Receive
Pin 3 - Tx to the control device Data Transmit
Pin 5 - system ground
The No512 player receives control messages on pin 2 Data Receive and transmit status responses,
notifications, and query data on pin 3 Data Transmit. The connection cable between the No512 and
the control device must be configured so that the receive signal on the No512 is connected to the
transmit signal of the control device.
3.2 Physical Connection Using a RJ-11 Cable
Host Controller No512 CD/SACD Player
Receive Data
Transmit Data
Ground
Transmit Data
Receive Data
Ground
2
3
5
3
2
5
RJ-11 Cable
Bit Rate: 57600bps
Data Bits: 8bit
Parity: None
Stop bit: 1bit
Flow Control: None
3.3 Physical Connection cable using RJ-11 to DSUB-9
Generally, if connecting the No512 player directly to a computer, a RJ-11 to DSUB-9 cable is
required. This is a standard cable that can be found in your local electronics or computer store. The
diagram on the next page provides general information for this type of cable. If you have difficulty
finding this cable type, contact your authorized Mark Levinson dealer for assistance.
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No512 CD/SACD Player Serial Communications Protocol Mark Levinson
RS-232 Cable Using RJ-11 to DSUB-9 Connectors:
4 Ethernet Port & Cable Configuration
The No512 is capable of obtaining a dynamically allocated IP address when connected to a DHCP server.
The DHCP setting can be modified via the internal Web page of the No512. Refer to the player’s user
manual for further instructions.
The No512 setup for Ethernet Control is defaulted to Auto-Negotiate and recommends the end point to
also be configured for Auto-Negotiation. However, the No512 is capable of:
• 10/100 BaseT
• Half/Full-duplex
• flow control
• Pause control
NOTE: the above parameters are NOT user adjustable.
4.1 Physical Connection using Ethernet Cables
If using a Direct-to-Ethernet capable Component, use a Crossover Ethernet Cable.
PC/Controller
(TCP Client) Mark Levinson
No512 player
Crossover
Cable
If using a router or switch, use a straight through Ethernet Cable.
Controller
(TCP Client) Mark Levinson
No512 player
Straight
Cable
Router
Straight
Cable
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Mark Levinson No512 CD/SACD Player Serial Communications Protocol
5 Message Formats and Examples
The external protocol consists of a structured format string with specific fields used to indicate:
Message type
Source of the command
Command
Status/Parameter
Messages can be transmitted to (incoming) and received from (outgoing) the No512 to facilitate system
control via RS-232 or Ethernet connection.
5.1 Format of the Message Fields
All incoming and outgoing messages must use the following format:
HDR:SRC:CMD:PARAM\r
where:
HDR The Header field specifies the type of message:
RQST – incoming request
RSP – outgoing response
NTF – outgoing notification
SRC The Source field specifies the source of the message:
CS – message from a Control Source
UI – message from a User Interaction
AV – used by notifications to indicate and event was caused by the component
without user interaction
CMD The Command field specifies the command selected from the External Protocol
Commands table to invoke the desired functionality.
PARAM The Parameter field specifies the selected parameter from the External Protocol
Commands table to achieve the desired effect.
Fields are separated by a colon “:” and messages are terminated with a ‘\r’ control character
(0x0d).
All fields, commands and associated parameters are case sensitive and must be entered as listed in the
External Protocol Commands table. Do not insert spaces in message sequences, unless they are
indicated in the table.
Maximum message size is 60 characters, including the line ending ASCII control character ‘\r’ (0x0D).
When an incoming or outgoing message uses more than one parameter, the individual parameters must
be separated by commas.
HDR:SRC:CMD:PARAM1,PARAM2,PARAM3,…\r
When an incoming command requires multiple parameters per request (RQST), ALL parameters for the
given command must be entered AND in the order presented in the External Protocol Commands table,
as the descriptors are not utilized in the parameter field of the command/response string. The response
message also follows these guidelines.
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No512 CD/SACD Player Serial Communications Protocol Mark Levinson
5.2 Incoming Messages
The Header Field (1st field) of every external protocol string indicates the type of message contained
within the transmitted string. All incoming messages to the No512 contain the string “RQST” in the header
field. Any other string in the header field indicates an outgoing message. The control source that issued
the Request (RQST) expects a reply within 500ms after receipt of the string to indicate that the message
was received. This response can be an acknowledgement (ACK), the requested action if a data
parameter was requested, or a WAIT to indicate the system has received the command but needs
additional time to process the request.
NOTE: When an incoming request is received, the system acknowledges receipt of the string within
500ms of receiving the incoming message.
5.3 Outgoing Messages
Outgoing Messages are generated to acknowledge an incoming request, to provide requested
information, or to inform of a system action occurring. As with an incoming message, the Header field is
used to indicate the type of message contained within the string. Outgoing messages will be a response
(RSP) to a request or a system generated notification (NTF) message.
5.3.1 RSP – Response to Command Request
An outgoing RSP will be generated as the result of an incoming RQST. In most cases the response is an
acknowledgement (ACK) unless the request is a query “?”. In the case of a query, the RSP contains the
requested parameter, rather than an ACK.
5.3.2 NTF – Notification of System Action
An NTF is generated as the result of a system action occurring. When commands are issued to the
system, they are placed in a queue in the order they are received. When the command is acted upon and
the requested action has completed or occurred, a notification is generated within the system.
Notifications can occur if a user issues a RQST via External Protocol to instruct the system to perform an
action.
When a NTF event occurs, the source field indicates the source of the event:
UI (user interaction)
AV (component generated) fault
It’s important to note that Notifications are only sent to the Controller if they are enabled. See the
Notification Factory Defaults section of this document for the factory default settings. See the External
Protocol Commands section in this document for more information.
5.4 Example Request - RQST
RQST:CS:PWR:ON\r - incoming Request (RQST) from a Control Source (CS) commanding
Power (PWR) ON.
RQST:CS:PWR:?\r - incoming Request (RQST) from a Control Source (CS) querying the Power
(PWR) state.
RQST:CS:PWR:NTF?\r - incoming Request (RQST) from a Control Source (CS) querying the
Power (PWR) Notification state.
RQST:CS:VOL:25.6\r - incoming Request (RQST) from a Control Source (CS) commanding
Volume (VOL) to 25.6.
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Mark Levinson No512 CD/SACD Player Serial Communications Protocol
9
5.5 Example Response - RSP
RSP:CS:PWR:ACK\r – outgoing Response (RSP) generated from a Control Source request,
indicating the command (PWR) is valid and the parameter supplied during the request is within
the expected range, acknowledging (ACK) the request is being processed.
RSP:CS:PWR:ON\r – outgoing Response (RSP) generated from a Control Source query request,
indicating the command (PWR) current state is (ON).
RSP:CS:PWR:EN\r – outgoing Response (RSP) generated from a Control Source notification
state query request, indicating the command (PWR) notification is enabled (EN).
5.6 Example Notification - NTF
NTF:UI:PWR:ON\r – outgoing Notification generated from a User Interaction (UI), indicating the
command power (PWR) has turned ON.
NTF:UI:VOL:25.6\r – outgoing Notification generated from a User Interaction (UI), indicating the
command volume (VOL) is set to 25.6.
NOTE: Notifications for a specific command must be enabled for system generated messages. A
User Interaction indicates that a system parameter has changed by a user manipulating the
systems front panel controls, IR controls, or by changing a system parameter using the External
Protocol.
6 RQST Error Responses and Examples
The External Protocol responds with the following message parameters when an unexpected Incoming
Request string is detected. If these responses are received, verify spelling, spacing and capitalization of
all characters of the failing field.
The format of the response message string indicates where the error has been detected, as shown in the
examples:
INVALID_SRC – The entered Source is not a valid source and is not recognized by the system.
Example: RSP:INVALID_SRC\r – received if sending RQST:Cs:VOL:50.0\r
INVALID_CMD – The entered Command is not a valid command and is not recognized by the
system. Example: RSP:CS:INVALID_CMD\r – received if sending RQST:CS:VoL:50.0\r
INVALID_PRM – The entered Parameter is not a valid parameter for the given command, or is
out of the acceptable range for the command.
Example: RSP:CS:VOL:INVALID_PRM\r – received if sending RQST:CS:VOL:47.855\r
INVALID_STR – The entered Request String is not formatted correctly and is not valid.
Example: RSP:CS:INVALID_STR\r – received if sending QST:CS:VOL:50.0\r, or
RQST:CSVOL:50.0\r
NACK – The incoming request is Not Acknowledged, indicating the system is in Standby and the
request is being ignored.
Example: RSP:CS:VOL:NACK\r – received if sending RQST:CS:VOL:50.0\r while the system
is in Standby

No512 CD/SACD Player Serial Communications Protocol Mark Levinson
7 External Protocol Commands
The command examples under the field “Incoming Request” assumes the keywords RQST:CS: precedes the command parameter
indicated in the table, i.e. RQST:CS:PWR:ON\r
The command examples under the field “Outgoing Response” must include the keyword RSP:CS: preceding the response indicated in the
table, i.e. RSP:CS:PWR:ACK\r
7.1 AREA
Command Parameter Function Incoming Request Outgoing Response Comment
AREA* CD Select CD Area of Disc AREA:CD\r AREA:ACK\r
SACD_2CHAN
Select SACD_2CHAN Area of
Disc AREA:SACD_2CHAN\r AREA:ACK\r
Selecting an invalid AREA on the
installed disc leaves the AREA set to the
previous selection. Use the query (?)
parameter to verify the AREA selected.
SACD_MULTI
Select SACD_MULTI Area of
Disc AREA:SACD_MULTI\r AREA:ACK\r
NODISC NODISC is detected in drawer Not Applicable AREA:NODISC\r
The NODISC parameter is only valid as a
Response when NODISC is found during
an AREA query
? Request Current AREA State AREA:?\r AREA:CD\r *See note below
AREA:?\r AREA:SACD_2CHAN\r
AREA:?\r AREA:SACD_MULTI\r
AREA:?\r AREA:NODISC\r
AREA:NACK\r
The player is in Standby mode so
commands are ignored.
*NOTE: When the direct select AREA command is sent, the transport takes one to six seconds to complete its transition to the new state. If another
AREA command or query is received within this transition period, the transport may not respond to the commands in the correct order, thus resulting in an
incorrect response. Subsequent AREA commands or queries, sent after the settle period, will operate correctly.
7.2 CONTROL
Command Parameter Function Incoming Request Outgoing Response Comment
CONTROL PLAY Set unit to Play CONTROL:PLAY\r CONTROL:ACK\r Also removes player from Standby mode.
STOP Set unit to Stop CONTROL:STOP\r CONTROL:ACK\r
PAUSEON Set Pause On CONTROL:PAUSEON\r CONTROL:ACK\r
PAUSEOFF Request Pause Off CONTROL: PAUSEOFF\r CONTROL:ACK\r
? Request Current Control State CONTROL:?\r CONTROL:PLAY\r
CONTROL:?\r CONTROL:STOP\r
CONTROL:?\r CONTROL:PAUSEON\r
CONTROL:NACK\r
The player is in Standby mode so
commands - except for PLAY - are ignored.
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Mark Levinson No512 CD/SACD Player Serial Communications Protocol
7.3 DRAWER
Command Parameter Function Incoming Request Outgoing Response Comment
DRAWER TOGGLE Open/Close Drawer DRAWER:TOGGLE\r DRAWER:ACK\r
OPEN Open Drawer DRAWER:OPEN\r DRAWER:ACK\r
CLOSE Close Drawer DRAWER:CLOSE\r DRAWER:ACK\r
Also removes the player from
Standby mode.
? Request Current Drawer State DRAWER:?\r DRAWER:OPEN\r
DRAWER:?\r DRAWER:CLOSE\r
DRAWER:NACK\r
The player is in Standby mode so
commands - except for TOGGLE,
OPEN, and CLOSE - are ignored.
7.4 DSPLY
Command Parameter Function Incoming Request Outgoing Response Comment
DSPLY SETFB Sets Display to Full Brightness DSPLY:SETFB\r DSPLY:ACK\r Display set to Full brightness.
SET2 Sets Display Brightness to Setting 2 DSPLY:SET2\r DSPLY:ACK\r Display set to Medium brightness.
SET1 Sets Display Brightness to Setting 1 DSPLY:SET1\r DSPLY:ACK\r Display set to Low brightness.
OFF Turns Display OFF DSPLY:OFF\r DSPLY:ACK\r Display is OFF.
? Request Current Display Setting DSPLY:?\r DSPLY:SETFB\r Display set to Full.
DSPLY:?\r DSPLY:SET2\r Display Brightness set to Medium.
DSPLY:?\r DSPLY:SET1\r Display Brightness set to Low.
DSPLY:?\r DSPLY:OFF\r Display is OFF.
EN Enables Notification DSPLY:EN\r DSPLY:ACK\r
DIS Disables Notification DSPLY:DIS\r DSPLY:ACK\r
NTF? Query Notification State DSPLY:NTF?\r DSPLY:EN\r Notification is Enabled
DSPLY:NTF?\r DSPLY:DIS\r Notification is Disabled
DSPLY:NACK\r
The player is in Standby mode so
commands are ignored.
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No512 CD/SACD Player Serial Communications Protocol Mark Levinson
7.5 FPDWNUP
Command Parameter Function Incoming Request Outgoing Response Comment
FPDWNUP STOP Front Panel Button Pressed
Down and Released FPDWNUP:STOP\r FPDWNUP:ACK\r
PLAY FPDWNUP:PLAY\r FPDWNUP:ACK\r Also removes the player from Standby mode.
PAUSE FPDWNUP:PAUSE\r FPDWNUP:ACK\r
PTRK FPDWNUP:PTRK\r FPDWNUP:ACK\r Previous Track
NTRK FPDWNUP:NTRK\r FPDWNUP:ACK\r Next Track
REW FPDWNUP:REW\r FPDWNUP:ACK\r
Fast Backward (PTRK) – emulates holding down
the PREV button on Front Panel
FFWD FPDWNUP:FFWD\r FPDWNUP:ACK\r
Fast Forward (NTRK) – emulates holding down
the NEXT button on Front Panel
TIME FPDWNUP:TIME\r FPDWNUP:ACK\r
REPEAT FPDWNUP:REPEAT\r FPDWNUP:ACK\r
DISPLAY FPDWNUP:DISPLAY\r FPDWNUP:ACK\r
CD_SACD FPDWNUP:CD_SACD\r FPDWNUP:ACK\r
DRAWER FPDWNUP:DRAWER\r FPDWNUP:ACK\r Also removes the player from Standby mode.
STANDBY FPDWNUP:STANDBY\r FPDWNUP:ACK\r Also removes the player from Standby mode.
FPDWNUP:NACK\r
The player is in Standby Mode so commands –
except for PLAY, DRAWER, and STANDBY –
are ignored.
7.6 HWSTATUS
Command Parameter Function Incoming Request Outgoing Response Comment
HWSTATUS NAME Display the assigned host
name. HWSTATUS:NAME\r
Example:
HWSTATUS:NO512_00005B\r
MAC Display the MAC address. HWSTATUS:MAC\r Example:
HWSTATUS:AABBCCDDEEFF\r
IP
Display the Internet Protocol
(IP) address. HWSTATUS:IP\r Example:
HWSTATUS:192.168.10.10\r
STATICIP Display the static IP address. HWSTATUS:STATICIP\r Example:
HWSTATUS:192.168.50.8\r
MASK
Displays the IP address of the
subnet mask. HWSTATUS:MASK\r Example:
HWSTATUS:255.255.255.0\r
Response Only.
Outgoing response
column lists typical
examples.
DHCP DHCP Status HWSTATUS:DHCP\r HWSTATUS:ENABLE\r
HWSTATUS:DISABLE\r Response only.
MLNETVER Displays the ML Net version. HWSTATUS:MLNETVER\r Example: HWSTATUS:v0.1.0\r For Customer Service
use.
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Mark Levinson No512 CD/SACD Player Serial Communications Protocol
7.7 IRDWNUP
Command Parameter Function Incoming Request Outgoing Response Comment
IRDWNUP DRAWER IR Button Pressed
Down and Released IRDWNUP:DRAWER\r IRDWNUP:ACK\r
Also removes the player from Standby mode.
Use the VOL command to control the Volume
level.
PTRK IRDWNUP:PTRK\r IRDWNUP:ACK\r
NTRK IRDWNUP:NTRK\r IRDWNUP:ACK\r
SHUFFLE IRDWNUP:SHUFFLE\r IRDWNUP:ACK\r
FFWD IRDWNUP:FFWD\r IRDWNUP:ACK\r
REW IRDWNUP:REW\r IRDWNUP:ACK\r
PAUSE IRDWNUP:PAUSE\r IRDWNUP:ACK\r
PLAY IRDWNUP:PLAY\r IRDWNUP:ACK\r Also removes the player from Standby mode.
REPEAT IRDWNUP:REPEAT\r IRDWNUP:ACK\r
STOP IRDWNUP:STOP\r IRDWNUP:ACK\r
TIME IRDWNUP:TIME\r IRDWNUP:ACK\r
CD_SACD IRDWNUP:CD_SACD\r IRDWNUP:ACK\r
MUTE IRDWNUP:MUTE\r IRDWNUP:ACK\r
CLEAR IRDWNUP:CLEAR\r IRDWNUP:ACK\r
PROGRAM IRDWNUP:PROGRAM\r IRDWNUP:ACK\r
0 IRDWNUP:0\r IRDWNUP:ACK\r
1 IRDWNUP:1\r IRDWNUP:ACK\r
2 IRDWNUP:2\r IRDWNUP:ACK\r
3 IRDWNUP:3\r IRDWNUP:ACK\r
4 IRDWNUP:4\r IRDWNUP:ACK\r
5 IRDWNUP:5\r IRDWNUP:ACK\r
6 IRDWNUP:6\r IRDWNUP:ACK\r
7 IRDWNUP:7\r IRDWNUP:ACK\r
8 IRDWNUP:8\r IRDWNUP:ACK\r
9 IRDWNUP:9\r IRDWNUP:ACK\r
PLUS10 IRDWNUP:PLUS10\r IRDWNUP:ACK\r
DISPINTENS IRDWNUP:DISPINTENS\r IRDWNUP:ACK\r
VOL_FIXVAR IRDWNUP:VOL_FIXVAR\r IRDWNUP:ACK\r Lower volume levels BEFORE sending command
to avoid extreme changes in the volume level.
STANDBY IRDWNUP:STANDBY\r IRDWNUP:ACK\r Also removes the player from Standby mode.
IRDWNUP:NACK\r
The player is in Standby mode so commands -
except for PLAY, DRAWER, and STANDBY - are
ignored.
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No512 CD/SACD Player Serial Communications Protocol Mark Levinson
7.8 MSG
Command Parameter Function Incoming Request Outgoing Response Comment
MSG Up to 12 ASCII
Character MSG Display MSG on Front Panel MSG:HELLO\r MSG:ACK\r No colon, no lower case
CLEAR Clear displayed MSG and return
to normal display MSG:CLEAR\r MSG:ACK\r
? Query Front Panel display MSG:?\r MSG:ON\r Up to 16 characters can be returned.
EN Enables Notification of MSG State
Changes MSG:EN\r MSG:ACK\r
When Notifications are enabled, they
are sent approximately once per
/second while playing.
DIS Disables Notification of MSG
State Changes MSG:DIS\r MSG:ACK\r
NTF? Query Notification State MSG:NTF?\r MSG:EN\r Notification is Enabled
MSG:NTF?\r MSG:DIS\r Notification is Disabled
MSG:NACK\r
The player is in Standby Mode so
commands are ignored.
7.9 MUTE
Command Parameter Function Incoming Request Outgoing Response Comment
MUTE ON Mute is set ON MUTE:ON\r MUTE:ACK\r
OFF Mute is set OFF MUTE:OFF\r MUTE:ACK\r
? Request Current MUTE state MUTE:?\r MUTE:ON\r Mute State is ON
MUTE:?\r MUTE:OFF\r Mute State is OFF
MUTE:NACK\r The player is in Standby Mode so
commands are ignored.
7.10 NOP
Command Parameter Function Incoming Request Outgoing Response Comment
NOP NOP No operation is performed NOP:NOP\r NOP:ACK\r
Used for testing communication.
The command responds if the player
is in Standby mode. However, the
command does NOT change the
Standby mode state.
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Mark Levinson No512 CD/SACD Player Serial Communications Protocol
7.11 PWR
Command Parameter Function Incoming Request Outgoing Response Comment
PWR ON Player Powered ON from Standby PWR:ON\r PWR:ACK\r Also removes the player from the
Standby mode.
STANDBY Place Player into Standby Mode PWR:STANDBY\r PWR:ACK\r
? Request Current PWR State PWR:?\r PWR:ON\r
System Powered ON.
The command responds if the player
is in Standby mode. However, the
command does NOT change the
Standby mode state.
PWR:?\r PWR:STANDBY\r System in Standby
EN Enables Notification PWR:EN\r PWR:ACK\r
DIS Disables Notification PWR:DIS\r PWR:ACK\r
NTF? Query Notification State PWR:NTF?\r PWR:EN\r Notification is Enabled
PWR:NTF?\r PWR:DIS\r Notification is Disabled
7.12 REPEAT
Command Parameter Function Incoming Request Outgoing Response Comment
REPEAT OFF Set Repeat option to OFF REPEAT:OFF\r REPEAT:ACK\r
TRACK Repeat current Track REPEAT:TRACK\r REPEAT:ACK\r
DISC Repeat current disc or program REPEAT:DISC\r REPEAT:ACK\r
? Request Current Control State REPEAT:?\r REPEAT:OFF\r
REPEAT:?\r REPEAT:TRACK\r
REPEAT:?\r REPEAT:DISC\r
REPEAT:NACK\r
The player is in Standby Mode so
commands are ignored.
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No512 CD/SACD Player Serial Communications Protocol Mark Levinson
7.13 SHUFFLE
Command Parameter Function Incoming Request Outgoing Response Comment
SHUFFLE ON Set Shuffle option to ON SHUFFLE:ON\r SHUFFLE:ACK\r
OFF Set Shuffle option to OFF SHUFFLE:OFF\r SHUFFLE:ACK\r
? Request Current Shuffle option State SHUFFLE:?\r SHUFFLE:OFF\r
SHUFFLE:?\r SHUFFLE:ON\r
SHUFFLE:NACK\r
The player is in Standby Mode so
commands are ignored.
7.14 TIME
Command Parameter Function Incoming Request Outgoing Response Comment
TIME TOT Time on Track TIME:TOT\r TIME:ACK\r
TRT Track Remaining Time TIME:TRT\r TIME:ACK\r
TOD Time on Disc TIME:TOD\r TIME:ACK\r
TRD Time Remaining Disc TIME:TRD\r TIME:ACK\r
? Request Current Time option TIME:?\r TIME:TOT\r
TIME:?\r TIME:TRT\r
TIME:?\r TIME:TOD\r
TIME:?\r TIME:TRD\r
TIME:NACK\r
The player is in Standby Mode so
commands are ignored.
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Mark Levinson No512 CD/SACD Player Serial Communications Protocol
7.15 TRACK
Command Parameter Function Incoming Request Outgoing Response Comment
TRACK PTRK Move to Previous Track TRACK:PTRK\r TRACK:ACK\r
NTRK Move to Next Track TRACK:NTRK\r TRACK:ACK\r
REW
Cycles through the four Fast Reverse
speeds TRACK:REW\r TRACK:ACK\r
FFWD
Cycles through the four Fast Forward
speeds TRACK:FFWD\r TRACK:ACK\r
? Request Current Speed TRACK:?\r TRACK:FFWD0\r Normal Speed
TRACK:?\r TRACK:FFWD1\r
TRACK:?\r TRACK:FFWD2\r
TRACK:?\r TRACK:FFWD3\r
TRACK:?\r TRACK:FREW0\r
TRACK:?\r TRACK:FREW1\r
TRACK:?\r TRACK:FREW2\r
TRACK:?\r TRACK:FREW3\r
Response only.
TRACK:NACK\r
The player is in Standby
Mode so commands are
ignored.
7.16 VOL
Command Parameter Function Incoming Request Outgoing Response Comment
VOL* 00.0 to 73.2 Sets Volume level between 00.0
and 73.2 VOL:71.1\r VOL:ACK\r
Sets the Volume level to a selected
value. The incoming request is an
example of setting the volume level to
71.1
The value 00.0 turns off the volume and
73.2 is the maximum value. Any values
above 73.2 are accepted, but the level
won’t exceed the maximum value.
? Request Current Volume VOL:?\r VOL:XX.X\r XX.X indicates the return value of the
current volume level.
VOL:NACK\r
The player is in Standby Mode so
commands are ignored.
*NOTE: The volume value MUST be three digits, written in the xx.x format, otherwise the player does not recognize the command and returns an invalid
parameter error. If a value is sent that is outside the listed limits, the volume level is clipped to the nearest valid value - either the maximum or the minimum
volume level.
17

No512 CD/SACD Player Serial Communications Protocol Mark Levinson
7.17 VOLCTL
Command Parameter Function Incoming Request Outgoing Response Comment
VOLCTL FIX Sets Volume to Fixed State VOLCTL:FIX\r VOLCTL:ACK\r
VAR Sets Volume to Variable State VOLCTL:VAR\r VOLCTL:ACK\r
? Request Current Volume Control
State VOLCTL:?\r VOLCTL:FIX\r
VOLCTL:?\r VOLCTL:VAR\r
VOLCTL:NACK\r
The player is in Standby Mode so
commands are ignored.
8 Notification Factory Defaults
Command
Factory
Default
Setting Notes
AREA N/A Notification not available for this command
CONTROL N/A Notification not available for this command
DRAWER N/A Notification not available for this command
DSPLY NO
FPDWNUP N/A Notification not available for this command
IRDWNUP N/A Notification not available for this command
MSG NO
MUTE N/A Notification not available for this command
NOP N/A Notification not available for this command
PWR YES
REPEAT N/A Notification not available for this command
SHUFFLE N/A Notification not available for this command
TIME N/A Notification not available for this command
TRACK N/A Notification not available for this command
VOL N/A Notification not available for this command
VOLCTL N/A Notification not available for this command
18