Krell HTS 7.1 Processor

Make/Model	Device Version	Connection Type
Krell/HTS 7.1	???	Serial

Description:

This driver controls the Krell HTS 7.1 A/V processor. The HTS is a high end processor, but has less than optimal control protocol. It is fairly limited in what you can control and much of the functionality is not two way.

Quirks and Limitations:

This is one of those silly devices that only responds to power on commands when it is in power off state. Therefore, this driver is a 'dead mode' driver, meaning that when the device is powered off, all of the fields except for the 'revival' field go into error state because no valid data is available for them during this time. The revival field for this driver is the PowerMainZone field.
Because of this protocol design, you are responsible for insuring that the device gets powered before it is used, else you can get field read/write errors because the fields are in error.
Certain commands affect subsequent commands. For example, picking the current zone allows subsequent “generic” commands to affect that chosen zone.

Connection Details

This device is serially controlled and the settings are 9600 baud, 8 data bits, one stop bit, and no parity.

Driver Fields

This section lists the fields that the driver makes available, their types, minimum and maximum values, etc...
Name Type R/W Description/Limits
AudioDecode String R Indicates the currently active audio decode mode (See chart below)
AudioStream String R Indicates the currently active audio stream type (See chart below)
BackTrim Card W Set the back trim setting. The values are 0 to 20.
Balance Card W Set the balance level. The values are 0 to 26.
CenterTrim Card W Set the center trim setting. The values are 0 to 20.
CompressionMode String R Indicates the currently active compression mode.
CurrentZone String R Either Z1 or Z2 to indicate current zone
DecodeModeSelectCommand String W Set the decoding mode you want to use. This is an enumerated field. The list is fairly long, so see the chart below for the values.
GeneralSelectCommand String W Selection of input per the DirectSelectMap (See chart below)
GenericZoneDirectSelectCommand String W Set the zone direct select mode. This is an enumerated field. The list is fairly long, so the values are listed below
InputMainZone String R
Display of current input from the MainZoneSelectMap (See chart below, may be customized)
InputTrigger Bool R Get the state of the input trigger.
InputZone2 String R Display of current input from the Zone2SelectMap (See chart below, may be customized)
LevelCommand String W Selection of command per the LevelMap (See chart below)
MainZoneDirectSelectCommand String W Selection of input from the MainZoneSelectMap (See chart below, may be customized)
MainZoneMute Bool R Get the main zone mute status.
MenuCommand String W Allows setting the cursor during setup operations using the MenuMap (see chart below)
PowerMainZone Bool R/W Get/set the main device power/standby state. This is the revive field. When the device is in standby, this is the only field available, so that you can power it back on.
PowerZone2 Bool R Get the power status of zone 2.
RoomEQ Card W Set the room EQ state. The values are 0 to 4.
SubTrim Card W Set the sub trim setting. The values are 0 to 20.
SurroundTrim Card W Set the surround trim setting. The values are 0 to 20.
SystemMute Bool R Get the main zone mute state.
Trigger1/2/3/4 Bool W Set the state of triggers 1 through 4.
VolumeMain Card R/W Get/set the volume of the main zone. The range is 0 to 152.
VolumeZone2 Card R/W Get/set the volume of the zone 2. The range is 0 to 152.
Zone2DirectSelectCommand String W Selection of input from the Zone2SelectMap (See chart below, may be customized)
Zone2Mute Bool R Get the zone 2 mute status.
Zone2Only Bool R Indicates whether only zone 2 is powered
ZoneSelectCommand String W Allows selection of “Main Zone” or “Zone 2” for subsequent generic commands

Decode Modes:
Mode 1
Mode 2
Prologic
Stereo
Preamp
THX
DD 5.1
DD 5.1 + THX
DD 5.1 + THX EX
AC3 2/0 Stereo
AC3 2/0 PLII Movie
AC3 2/0 PLII Music
AC3 2/0 PLII Matrix
AC3 2/0 PLII Emulation
AC3 2/0 PLII Movie + THX
AC3 2/0 PLII Emulation + THX
DTS 5.1 Music
DTS 5.1 Movie
DTS 5.1 Matrix
DTS 5.1 Movie + THX
DTS 5.1 Matrix + THX
DTS 6.1 Discrete
DTS 6.1 Discrete + THX
DTS 5.1 Force
Stereo Mode
PLII Movie
PLII Music
PLII Matrix
PLII Emulation
PLII Movie + THX
PLII Emulation + THX
DTS Neo:6 Cinema
DTS Neo:6 Music
DTS Neo:6 Cinema + THX
Party
General Admission
Front Row
On Stage
Enhanced Stereo
Orchestra
Mezzanine
Full Range + Sub
Monophonic
24/96 Decode
Direct Select Modes:
7.1
AnalogAudio1
AnalogAudio2
AnalogAudio3
AnalogAudio4
AnalogAudio5
AnalogAudio6
AnalogAudio7
AnalogBalanced
AnalogTape
AnalogVCR
DigitalAudioCoax1
DigitalAudioCoax2
DigitalAudioCoax3
DigitalAudioCoax4
DigitalAudioCoax5
DigitalAudioCoax6
DigitalAudioOptical1
DigitalAudioOptical2
VideoComponent1
VideoComponent2
VideoComposite1
VideoComposite2
VideoComposite3
VideoComposite4
VideoSVideo1
VideoSVideo2
VideoSVideo3
VideoSVideo4
Audio Stream:
PCM
Dolby Digital 2.0
Dolby Digital 5.1
DTS 5.1
24-bit, 96 Khz PCM
PCM Digital Input
PCM Analog Input
Dolby Digital X/Y
7.1 (8 Channel Discrete)
DTS 6.1 ES Matrix
DTS 6.1 ES Discrete
DTS 6.1 ES Matrix & Discrete
GeneralSelect:
7.1
AnalogAudio1
AnalogAudio2
AnalogAudio3
AnalogAudio4
AnalogAudio5
AnalogAudio6
AnalogAudio7
AnalogBalanced
AnalogTape
AnalogVCR
DigitalAudioCoax1
DigitalAudioCoax2
DigitalAudioCoax3
DigitalAudioCoax4
DigitalAudioCoax5
DigitalAudioCoax6
DigitalAudioOptical1
DigitalAudioOptical2
VideoComponent1
VideoComponent2
VideoComposite1
VideoComposite2
VideoComposite3
VideoComposite4
VideoSVideo1
VideoSVideo2
VideoSVideo3
VideoSVideo4
MainZoneSelect:
AnalogAudio1
AnalogAudio2
AnalogAudio3
AnalogAudio4
AnalogAudio5
AnalogAudio6
AnalogAudio7
AnalogBalanced
AnalogTape
AnalogVCR
Aux1
Aux2
CD
DVD
LD
Satellite
Tape
Tuner
TV
VCR
Zone2Select
AnalogAudio1
AnalogAudio2
AnalogAudio3
AnalogAudio4
AnalogAudio5
AnalogAudio6
AnalogAudio7
AnalogBalanced
AnalogTape
AnalogVCR
Aux1
Aux2
CD
DVD
LD
Satellite
Tape
Tuner
TV
VCR
LevelMap
Up
Down
SelectCenterTrim
SelectSurroundTrim
SelectSubTrim
SelectCurrentZoneBalance
SelectZone2Balance
MuteCurrentZone
MuteMainZone
MuteZone2
NightCompression
NormalCompression
MaxCompression
MenuMap
Cursor Up
Cursor Down
Cursor Left
Cursor Right
Menu
Enter
Previous

Name	Type	R/W	Description/Limits
AudioDecode	String	R	Indicates the currently active audio decode mode (See chart below)
AudioStream	String	R	Indicates the currently active audio stream type (See chart below)
BackTrim	Card	W	Set the back trim setting. The values are 0 to 20.
Balance	Card	W	Set the balance level. The values are 0 to 26.
CenterTrim	Card	W	Set the center trim setting. The values are 0 to 20.
CompressionMode	String	R	Indicates the currently active compression mode.
CurrentZone	String	R	Either Z1 or Z2 to indicate current zone
DecodeModeSelectCommand	String	W	Set the decoding mode you want to use. This is an enumerated field. The list is fairly long, so see the chart below for the values.
GeneralSelectCommand	String	W	Selection of input per the DirectSelectMap (See chart below)
GenericZoneDirectSelectCommand	String	W	Set the zone direct select mode. This is an enumerated field. The list is fairly long, so the values are listed below
InputMainZone	String	R	Display of current input from the MainZoneSelectMap (See chart below, may be customized)
InputTrigger	Bool	R	Get the state of the input trigger.
InputZone2	String	R	Display of current input from the Zone2SelectMap (See chart below, may be customized)
LevelCommand	String	W	Selection of command per the LevelMap (See chart below)
MainZoneDirectSelectCommand	String	W	Selection of input from the MainZoneSelectMap (See chart below, may be customized)
MainZoneMute	Bool	R	Get the main zone mute status.
MenuCommand	String	W	Allows setting the cursor during setup operations using the MenuMap (see chart below)
PowerMainZone	Bool	R/W	Get/set the main device power/standby state. This is the revive field. When the device is in standby, this is the only field available, so that you can power it back on.
PowerZone2	Bool	R	Get the power status of zone 2.
RoomEQ	Card	W	Set the room EQ state. The values are 0 to 4.
SubTrim	Card	W	Set the sub trim setting. The values are 0 to 20.
SurroundTrim	Card	W	Set the surround trim setting. The values are 0 to 20.
SystemMute	Bool	R	Get the main zone mute state.
Trigger1/2/3/4	Bool	W	Set the state of triggers 1 through 4.
VolumeMain	Card	R/W	Get/set the volume of the main zone. The range is 0 to 152.
VolumeZone2	Card	R/W	Get/set the volume of the zone 2. The range is 0 to 152.
Zone2DirectSelectCommand	String	W	Selection of input from the Zone2SelectMap (See chart below, may be customized)
Zone2Mute	Bool	R	Get the zone 2 mute status.
Zone2Only	Bool	R	Indicates whether only zone 2 is powered
ZoneSelectCommand	String	W	Allows selection of “Main Zone” or “Zone 2” for subsequent generic commands