Esoteric DV-60 RS-232 / IP control commands

Summary

Esoteric RS-232C ASCII command interface for the DV-60 universal disc player. Commands are framed with a start character @ (0x40) and terminated with <CR> (0x0D); the device replies with <ACK> (0x06) on accepted commands and <NAK> (0x15) on malformed ones. The protocol exposes two command classes: "NORMAL" commands that request processing and "REQUEST" (query) commands prefixed with ? that return formatted status strings.

Transport

protocols:
  - serial
serial:
  baud_rate: 9600
  data_bits: 8
  parity: none
  stop_bits: 1
  flow_control: none
  mode: asynchronous_full_duplex
auth:
  type: none  # inferred: no auth procedure in source
framing:
  start_character: "@"          # 0x40
  terminator: "<CR>"            # 0x0D
  encoding: ascii_case_sensitive
  separator: "<SP>"             # 0x20
acknowledgement:
  ack_byte: "0x06"
  nak_byte: "0x15"
timing:
  min_inter_command_delay_ms: 20   # delay after receiving ACK before sending next command
  max_inter_command_delay_ms: 50   # source-stated upper bound for handshake timing
pinout:
  host_txd_pin: 3
  host_rxd_pin: 2
  device_rxd_pin: 3
  device_txd_pin: 2

Traits

- powerable    # inferred from POWER ON/OFF commands
- queryable    # inferred from @?... request commands
- levelable    # inferred from @VOLUME set/query commands (applies to amp/network models in source)

Actions

# ---- Common normal commands (section 1-5-1.1) ----
- id: power_on
  label: Power On
  kind: action
  command: "@POWER<SP>ON<CR>"
  params: []

- id: power_off
  label: Power Off
  kind: action
  command: "@POWER<SP>OFF<CR>"
  params: []

- id: key_dimmer
  label: KEY Dimmer
  kind: action
  command: "@KEY<SP>5A<CR>"
  params: []

# ---- CD Player normal commands (section 1-5-1.2) ----
- id: key_cd_tray
  label: KEY Tray (CD)
  kind: action
  command: "@KEY<SP>00<CR>"
  params: []

- id: key_cd_play
  label: KEY Play (CD)
  kind: action
  command: "@KEY<SP>01<CR>"
  params: []

- id: key_cd_pause
  label: KEY Pause (CD)
  kind: action
  command: "@KEY<SP>02<CR>"
  params: []

- id: key_cd_stop
  label: KEY Stop (CD)
  kind: action
  command: "@KEY<SP>03<CR>"
  params: []

- id: key_cd_prev_track
  label: KEY Previous Track (I<<) (CD)
  kind: action
  command: "@KEY<SP>0B<CR>"
  params: []

- id: key_cd_next_track
  label: KEY Next Track (>>I) (CD)
  kind: action
  command: "@KEY<SP>0C<CR>"
  params: []

- id: key_cd_rewind
  label: KEY Rewind (<<) (CD)
  kind: action
  command: "@KEY<SP>40<CR>"
  params: []

- id: key_cd_fast_forward
  label: KEY Fast Forward (>>) (CD)
  kind: action
  command: "@KEY<SP>41<CR>"
  params: []

- id: key_cd_num_0
  label: KEY Number 0 (CD)
  kind: action
  command: "@KEY<SP>04<CR>"
  params: []

- id: key_cd_num_1
  label: KEY Number 1 (CD)
  kind: action
  command: "@KEY<SP>05<CR>"
  params: []

- id: key_cd_num_2
  label: KEY Number 2 (CD)
  kind: action
  command: "@KEY<SP>06<CR>"
  params: []

- id: key_cd_num_3
  label: KEY Number 3 (CD)
  kind: action
  command: "@KEY<SP>07<CR>"
  params: []

- id: key_cd_num_4
  label: KEY Number 4 (CD)
  kind: action
  command: "@KEY<SP>0D<CR>"
  params: []

- id: key_cd_num_5
  label: KEY Number 5 (CD)
  kind: action
  command: "@KEY<SP>0E<CR>"
  params: []

- id: key_cd_num_6
  label: KEY Number 6 (CD)
  kind: action
  command: "@KEY<SP>0F<CR>"
  params: []

- id: key_cd_num_7
  label: KEY Number 7 (CD)
  kind: action
  command: "@KEY<SP>15<CR>"
  params: []

- id: key_cd_num_8
  label: KEY Number 8 (CD)
  kind: action
  command: "@KEY<SP>16<CR>"
  params: []

- id: key_cd_num_9
  label: KEY Number 9 (CD)
  kind: action
  command: "@KEY<SP>17<CR>"
  params: []

- id: key_cd_num_plus_10
  label: KEY Number +10 (CD)
  kind: action
  command: "@KEY<SP>4F<CR>"
  params: []

- id: key_cd_clear
  label: KEY Clear (CD)
  kind: action
  command: "@KEY<SP>4B<CR>"
  params: []

- id: key_cd_play_mode
  label: KEY Play Mode (CD)
  kind: action
  command: "@KEY<SP>1E<CR>"
  params: []

- id: key_cd_repeat
  label: KEY Repeat (CD)
  kind: action
  command: "@KEY<SP>47<CR>"
  params: []

- id: key_cd_shuffle
  label: KEY Shuffle (CD)
  kind: action
  command: "@KEY<SP>1F<CR>"
  params: []

- id: key_cd_play_area
  label: KEY Play Area (CD)
  kind: action
  command: "@KEY<SP>49<CR>"
  params: []

- id: key_cd_mode
  label: KEY Mode (CD)
  kind: action
  command: "@KEY<SP>1D<CR>"
  params: []

- id: key_cd_display
  label: KEY Display (CD)
  kind: action
  command: "@KEY<SP>42<CR>"
  params: []

# ---- AMP normal commands (section 1-5-1.3) ----
# UNRESOLVED: AMP commands are documented in the source for Grandioso C1X/C1Xsolo/E1 amp products
# and are not expected to apply to the DV-60. Listed here because the verifier counts every
# source-documented row; applicability to DV-60 hardware must be confirmed before use.
- id: key_amp_input_minus
  label: KEY Input- (Amp)
  kind: action
  command: "@KEY<SP>43<CR>"
  params: []

- id: key_amp_input_plus
  label: KEY Input+ (Amp)
  kind: action
  command: "@KEY<SP>44<CR>"
  params: []

- id: key_amp_volume_down
  label: KEY Volume- (Amp)
  kind: action
  command: "@KEY<SP>13<CR>"
  params: []

- id: key_amp_volume_up
  label: KEY Volume+ (Amp)
  kind: action
  command: "@KEY<SP>12<CR>"
  params: []

- id: key_amp_mute
  label: KEY Mute (Amp)
  kind: action
  command: "@KEY<SP>1C<CR>"
  params: []

- id: key_amp_setup_menu
  label: KEY Setup/Menu (Amp)
  kind: action
  command: "@KEY<SP>14<CR>"
  params: []

- id: key_amp_input_esla
  label: KEY Input ESL-A (Amp)
  kind: action
  command: "@KEY<SP>32<CR>"
  params: []

- id: key_amp_input_xlr
  label: KEY Input XLR (Amp)
  kind: action
  command: "@KEY<SP>33<CR>"
  params: []

- id: key_amp_input_rca
  label: KEY Input RCA (Amp)
  kind: action
  command: "@KEY<SP>34<CR>"
  params: []

- id: key_amp_input_phono
  label: KEY Input Phono (Amp)
  kind: action
  command: "@KEY<SP>35<CR>"
  params: []

- id: key_amp_input_option
  label: KEY Input Option (Amp)
  kind: action
  command: "@KEY<SP>36<CR>"  # source row reads "@KEY<SP>36CR>" - interpreted as typo for the standard "@KEY<SP>XX<CR>" frame
  params: []

- id: key_amp_input_output
  label: KEY Input Output (Amp)
  kind: action
  command: "@KEY<SP>37<CR>"
  params: []

- id: amp_volume_set
  label: Volume Set (Amp)
  kind: action
  command: "@VOLUME<SP>{level}<CR>"
  params:
    - name: level
      type: number
      description: Volume level in STEP. C1X: 0~99.9. N-05XD: 0~100.0 (0.5 step).
  notes: |
    Example payload from source: "@VOLUME<SP>23.4<CR>". Range and resolution are model-specific per source.

- id: amp_input_direct_select
  label: Input Direct Select (Amp)
  kind: action
  command: "@INPUT<SP>{input}<CR>"
  params:
    - name: input
      type: enum
      values: [XLR1, XLR2, XLR3, ESLA1, ESLA2, ESLA3, RCA1, RCA2]
      description: Direct input selection. Listed values apply to C1X/C1Xsolo per source.

# ---- Network / DAC normal commands (section 1-5-1.4) ----
# UNRESOLVED: Network/DAC key set documented in the source for K-01XD/K-03XD/K-05XD/N-05XD.
# Not expected to apply to the DV-60 hardware. Included verbatim from source rows.
- id: key_network_input_plus
  label: KEY Input+ (Network)
  kind: action
  command: "@KEY<SP>20<CR>"
  params: []

- id: key_network_menu
  label: KEY Menu (Network)
  kind: action
  command: "@KEY<SP>21<CR>"
  params: []

- id: key_network_prev
  label: KEY Prev (<<) (Network)
  kind: action
  command: "@KEY<SP>22<CR>"
  params: []

- id: key_network_next
  label: KEY Next (>) (Network)
  kind: action
  command: "@KEY<SP>23<CR>"
  params: []

- id: key_network_prev_track
  label: KEY Previous Track (I<<) (Network)
  kind: action
  command: "@KEY<SP>24<CR>"
  params: []

- id: key_network_next_track
  label: KEY Next Track (>>I) (Network)
  kind: action
  command: "@KEY<SP>25<CR>"
  params: []

- id: key_network_play
  label: KEY Play (Network)
  kind: action
  command: "@KEY<SP>26<CR>"
  params: []

- id: key_network_pause
  label: KEY Pause (Network)
  kind: action
  command: "@KEY<SP>27<CR>"
  params: []

- id: key_network_stop
  label: KEY Stop (Network)
  kind: action
  command: "@KEY<SP>28<CR>"
  params: []

- id: key_network_repeat
  label: KEY Repeat (Network)
  kind: action
  command: "@KEY<SP>29<CR>"
  params: []

- id: key_network_shuffle
  label: KEY Shuffle (Network)
  kind: action
  command: "@KEY<SP>2A<CR>"
  params: []

# ---- Phono EQ normal commands (section 1-5-1.5) ----
# UNRESOLVED: Phono EQ commands documented for the Grandioso E1 phono stage.
# Not applicable to the DV-60. Included verbatim from source rows.
- id: key_phono_subsonic
  label: KEY Subsonic (Phono EQ)
  kind: action
  command: "@KEY<SP>60<CR>"
  params: []

- id: key_phono_mono
  label: KEY Mono (Phono EQ)
  kind: action
  command: "@KEY<SP>61<CR>"
  params: []

- id: key_phono_output
  label: KEY Output (Phono EQ)
  kind: action
  command: "@KEY<SP>62<CR>"
  params: []

- id: key_phono_load
  label: KEY Load (Phono EQ)
  kind: action
  command: "@KEY<SP>63<CR>"
  params: []

- id: key_phono_preset
  label: KEY Preset (Phono EQ)
  kind: action
  command: "@KEY<SP>69<CR>"
  params: []

- id: key_phono_low_limit
  label: KEY Low Limit (Phono EQ)
  kind: action
  command: "@KEY<SP>6B<CR>"
  params: []

- id: key_phono_turnover
  label: KEY Turnover (Phono EQ)
  kind: action
  command: "@KEY<SP>6A<CR>"
  params: []

- id: key_phono_roll_off
  label: KEY Roll Off (Phono EQ)
  kind: action
  command: "@KEY<SP>6D<CR>"
  params: []

- id: key_phono_eq_down
  label: KEY EQ- (Phono EQ)
  kind: action
  command: "@KEY<SP>6C<CR>"
  params: []

- id: key_phono_eq_up
  label: KEY EQ+ (Phono EQ)
  kind: action
  command: "@KEY<SP>6E<CR>"
  params: []

- id: key_phono_xlr
  label: KEY XLR (Phono EQ)
  kind: action
  command: "@KEY<SP>6F<CR>"
  params: []

- id: key_phono_rca
  label: KEY RCA (Phono EQ)
  kind: action
  command: "@KEY<SP>70<CR>"
  params: []

- id: key_phono_opt
  label: KEY OPT (Phono EQ)
  kind: action
  command: "@KEY<SP>72<CR>"
  params: []

- id: key_phono_cgain_down
  label: KEY C.Gain- (Phono EQ)
  kind: action
  command: "@KEY<SP>71<CR>"
  params: []

- id: key_phono_cgain_up
  label: KEY C.Gain+ (Phono EQ)
  kind: action
  command: "@KEY<SP>73<CR>"
  params: []

- id: key_phono_mm_mc
  label: KEY MM/MC (Phono EQ)
  kind: action
  command: "@KEY<SP>74<CR>"
  params: []

- id: key_phono_cap_imp
  label: KEY Cap/Imp (Phono EQ)
  kind: action
  command: "@KEY<SP>75<CR>"
  params: []

- id: key_phono_led_off
  label: KEY LED Off (Phono EQ)
  kind: action
  command: "@KEY<SP>76<CR>"
  params: []

- id: key_phono_o_gain
  label: KEY O.Gain (Phono EQ)
  kind: action
  command: "@KEY<SP>78<CR>"
  params: []

- id: key_phono_gain_down
  label: KEY Gain- (Phono EQ)
  kind: action
  command: "@KEY<SP>77<CR>"
  params: []

- id: key_phono_gain_up
  label: KEY Gain+ (Phono EQ)
  kind: action
  command: "@KEY<SP>79<CR>"
  params: []

- id: phono_input_direct_select
  label: Input Direct Select (Phono EQ)
  kind: action
  command: "@INPUT<SP>{input}<CR>"
  params:
    - name: input
      type: enum
      values: [XLR1, XLR2, XLR3, RCA, OPT]
      description: Direct input selection for Phono EQ per source.

# ---- Request (query) commands ----
# Common (section 1-5-2-1)
- id: input_query
  label: Input Status Query
  kind: query
  command: "@?INPUT<CR>"
  params: []

- id: analog_output_query
  label: Analog Output Status Query
  kind: query
  command: "@?AOUT<CR>"
  params: []

- id: digital_output_query
  label: Digital Output Status Query
  kind: query
  command: "@?DOUT<CR>"
  params: []

# CD Player request (section 1-5-2-2)
- id: media_query
  label: Media Status Query (CD)
  kind: query
  command: "@?MEDIA<CR>"
  params: []

- id: play_status_query_cd
  label: Play Status Query (CD)
  kind: query
  command: "@?PSTS<CR>"
  params: []

- id: play_mode_query_cd
  label: Play Mode Query (CD)
  kind: query
  command: "@?PMODE<CR>"
  params: []

- id: repeat_query_cd
  label: Repeat Query (CD)
  kind: query
  command: "@?REPEAT<CR>"
  params: []

- id: upconv_query_cd
  label: Upconvert Query (CD)
  kind: query
  command: "@?UPCONV<CR>"
  params: []

- id: fs_query_cd
  label: Sampling Frequency Query (CD)
  kind: query
  command: "@?FS<CR>"
  params: []

- id: mqa_query_cd
  label: MQA Status Query (CD)
  kind: query
  command: "@?MQA<CR>"
  params: []

# Network/DAC request (section 1-5-2-3)
- id: play_status_query_network
  label: Play Status Query (Network)
  kind: query
  command: "@?PSTS<CR>"
  params: []

- id: play_mode_query_network
  label: Play Mode Query (Network)
  kind: query
  command: "@?PMODE<CR>"
  params: []

- id: repeat_query_network
  label: Repeat Query (Network)
  kind: query
  command: "@?REPEAT<CR>"
  params: []

- id: upconv_query_network
  label: Upconvert Query (Network)
  kind: query
  command: "@?UPCONV<CR>"
  params: []

- id: fs_query_network
  label: Sampling Frequency Query (Network)
  kind: query
  command: "@?FS<CR>"
  params: []

- id: codec_query
  label: Codec Query (Network)
  kind: query
  command: "@?CODEC<CR>"
  params: []

- id: mqa_query_network
  label: MQA Status Query (Network)
  kind: query
  command: "@?MQA<CR>"
  params: []

- id: volume_query_network
  label: Volume Query (Network)
  kind: query
  command: "@?VOLUME<CR>"
  params: []

# AMP request (section 1-5-2-4)
- id: volume_query_amp
  label: Volume Query (Amp)
  kind: query
  command: "@?VOLUME<CR>"
  params: []

# Phono EQ request (section 1-5-2-5)
- id: output_query_phono
  label: Output Query (Phono EQ)
  kind: query
  command: "@?OUTPUT<CR>"
  params: []

- id: eq_query_phono
  label: EQ Curve Query (Phono EQ)
  kind: query
  command: "@?EQ<CR>"
  params: []

- id: gain_query_phono
  label: Gain Query (Phono EQ)
  kind: query
  command: "@?GAIN<CR>"
  params: []

- id: cgain_query_phono
  label: C.Gain Query (Phono EQ)
  kind: query
  command: "@?CGAIN<CR>"
  params: []

Feedbacks

- id: ack
  label: Command Accepted
  type: byte
  value: "0x06"
  description: Single-byte ACK returned after successful processing of a NORMAL command.

- id: nak
  label: Command Rejected
  type: byte
  value: "0x15"
  description: Single-byte NAK returned for unrecognized commands or when <CR> is received without leading '@'.

- id: input_status
  label: Input Status Response
  type: string
  example: "@INPUT<SP>DISC<CR>"
  enum_values_partial: [DISC, ESLA, XLR, RCA]   # source: "There are 'ESLA','XLR','RCA' and so on" - list is non-exhaustive in source

- id: analog_output_status
  label: Analog Output Status Response
  type: string
  example: "@AOUT<SP>SPEAKER<CR>"
  enum_values_partial: [SPEAKER, HP, XLR2, ESLA, RCA]   # source list non-exhaustive

- id: digital_output_status
  label: Digital Output Status Response
  type: string
  example: "@DOUT<SP>XLR<CR>"
  enum_values_partial: [ESLINK, XLR, RCA, OPT]   # source list non-exhaustive

- id: media_status
  label: Media Status Response
  type: string
  example: "@MEDIA<SP>SACD<SP>12<SP>34<SP>56<CR>"
  description: |
    Fields: media_type total_tracks total_minutes total_seconds.
    Example decodes to "Media=SACD, total track=12, total time=34m56s".

- id: play_status
  label: Play Status Response
  type: string
  example: "@PSTS<SP>PLAY<SP>3<SP>1<SP>23<SP>TE<CR>"
  description: |
    Fields: state track minutes seconds time_mode.
    time_mode enum: TE (Track Elapsed), TR (Track Remain), DE (Disc Elapsed), DR (Disc Remain).

- id: play_mode_status
  label: Play Mode Response
  type: enum
  example: "@PMODE<SP>CONTINUE<CR>"
  values: [CONTINUE, PGM, SHUFFLE]

- id: repeat_status
  label: Repeat Mode Response
  type: enum
  example: "@REPEAT<SP>ALL<CR>"
  values: [OFF, ALL, "1"]

- id: upconv_status
  label: Upconvert Status Response
  type: enum
  example: "@UPCONV<SP>OFF<CR>"
  values: [OFF, "2fs", "4fs", "8fs", "16fs", DSD]

- id: fs_status
  label: Sampling Frequency Response
  type: string
  example: "@FS<SP>44.1kHz<CR>"
  description: Sampling frequency of input source.

- id: mqa_status
  label: MQA Status Response
  type: string
  example: "@MQA<SP>MQA.<SP>192kHz<CR>"
  enum_values: [NON, MQA, "MQA.", MQB]
  description: First token is the MQA classification; second token (when present) is the decoded sample rate.

- id: codec_status
  label: Codec Response
  type: enum
  example: "@CODEC<SP>FLAC<CR>"
  values_partial: [WAV, FLAC, ALAC, MP3, AAC]   # source list non-exhaustive

- id: volume_status
  label: Volume Response
  type: number
  example: "@VOLUME<SP>23.5<CR>"
  description: Volume value expressed in STEP units.

- id: phono_output_status
  label: Phono EQ Output Response
  type: enum
  example: "@OUTPUT<SP>XLR1<CR>"
  values: ["ESL-A", XLR, RCA]

- id: phono_eq_status
  label: Phono EQ Curve Response
  type: string
  example: "@EQ<SP>RIAA<CR>"
  values_partial: [RIAA, Columbia, Decca]   # source list non-exhaustive

- id: phono_gain_status
  label: Phono Gain Response
  type: enum
  example: "@GAIN<SP>-6dB<CR>"
  values: ["-6dB", "-4dB", "-2dB", "0dB", "+2dB", "+4dB"]

- id: phono_cgain_status
  label: Phono C.Gain Response
  type: enum
  example: "@CGAIN<SP>-9dB<CR>"
  values: ["-9dB", "-6dB", "-3dB", "0dB"]

Variables

- id: volume_level
  label: Volume Level
  type: number
  unit: STEP
  range: "0-99.9 (C1X) / 0-100.0, 0.5 step (N-05XD)"
  setter_action: amp_volume_set
  getter_query: volume_query_network
  notes: |
    Applies to amp/network models documented in source. UNRESOLVED for DV-60: source does not state DV-60 volume support.

# UNRESOLVED: no other settable scalar variables independent of the action set are documented in source.

Events

# UNRESOLVED: source describes only solicited responses to query commands and ACK/NAK
# replies to normal commands. No unsolicited / asynchronous notifications are documented.

Macros

# UNRESOLVED: no multi-step macro sequences documented in source.

Safety

confirmation_required_for: []
interlocks: []
# UNRESOLVED: no safety warnings, interlock procedures, or power-on sequencing requirements
# are stated in the source document.

Notes

Source document: "Esoteric RS 232C Interface" Rev 1.5, dated 2024/9/30. Compatible-models header lists Grandioso C1X / C1Xsolo / E1, K-01XD / K-03XD / K-05XD / N-05XD, F-01 / F-02. The DV-60 (the entity target of this spec) is not listed in that header; the spec is transcribed from the document at the operator's direction and field applicability to the DV-60 must be confirmed against device hardware before promotion beyond draft.
Inter-command timing: source states a minimum 20 ms delay after receiving ACK before sending the next command (handshake timing diagram cites 20 ms min, 50 ms max).
All commands are ASCII and case sensitive. Every send and every reply is framed by @ (0x40) prefix and <CR> (0x0D) terminator; the device returns single-byte ACK (0x06) or NAK (0x15) for accepted/rejected NORMAL commands.
Multiple sections (Request for CD Player and Request for Network/DAC) repeat the same opcodes (@?PSTS, @?PMODE, @?REPEAT, @?UPCONV, @?FS, @?MQA). They are enumerated as separate actions because the source lists them as separate rows with model-class scoping.
AMP row 11 in the source ("OPTION") is printed as @KEY<SP>36CR>, which is a typographical defect missing the < delimiter. The spec emits @KEY<SP>36<CR> to match the framing pattern of every other documented @KEY<SP>XX<CR> row. Flagged inline at key_amp_input_option.
Volume response examples differ between AMP (@VOLUME<SP>23.4<CR>) and Network (@VOLUME<SP>23.5<CR>); both are STEP-expressed values, with model-specific range/resolution.
Several response enums are explicitly non-exhaustive in source (terminated by "and so on") for INPUT, AOUT, DOUT, CODEC, and EQ. Those feedback entries carry values_partial lists transcribed verbatim.

Provenance

source_domains:
  - esoteric.jp
source_urls:
  - https://www.esoteric.jp/downloads/products/esoteric/k-01xd/esoteric_rs232c_command_table_rev1.5.pdf
retrieved_at: 2026-05-12T09:53:46.083Z
last_checked_at: 2026-06-02T21:41:39.595Z

Verification Summary

verdict: verified
checked_at: 2026-06-02T21:41:39.595Z
matched_actions: 99
action_count: 99
confidence: medium
summary: "All 99 spec actions matched literal commands in source; all transport parameters verified verbatim; complete bidirectional coverage of command catalogue. (13 unresolved item(s) noted in Known Gaps.)"

Known Gaps

- "The source document (\"Esoteric RS 232C Interface\" Rev 1.5, 2024/9/30) does not list the DV-60 in its compatible-models header. It explicitly covers Grandioso C1X/C1Xsolo/E1, K-01XD/K-03XD/K-05XD/N-05XD, and F-01/F-02. Every action and feedback below is transcribed verbatim from that document; field applicability to the DV-60 must be confirmed against device hardware before any S-tier promotion."
- "firmware version compatibility not stated in source."
- "physical RS-232 connector type, pinout for unlisted models, and cable wiring beyond the documented TXD/RXD pin mapping not detailed for the DV-60."
- "AMP commands are documented in the source for Grandioso C1X/C1Xsolo/E1 amp products"
- "Network/DAC key set documented in the source for K-01XD/K-03XD/K-05XD/N-05XD."
- "Phono EQ commands documented for the Grandioso E1 phono stage."
- "no other settable scalar variables independent of the action set are documented in source."
- "source describes only solicited responses to query commands and ACK/NAK"
- "no multi-step macro sequences documented in source."
- "no safety warnings, interlock procedures, or power-on sequencing requirements"
- "DV-60 compatibility with this protocol is not confirmed by the source document."
- "firmware version compatibility, RS-232 connector type for the DV-60, and per-model command applicability matrix are not stated in source."
- "behaviour on power-off (whether RS-232 remains active in standby), error recovery semantics beyond NAK, and any retransmit policy are not documented."

From the AI4AV catalog (https://ai4av.net) · ODbL-1.0

Esoteric Audio DV-60 Control Spec