15 track, 16 vol, Track – Mark Levinson 512 User Manual

Page 17

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Mark Levinson

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512 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.

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