Summary

Devialet Astra high-fidelity integrated amplifier with RS-232 serial control. Supports power, source selection, volume, mute, phase, pre-out, RIAA curve, subsonic filter, and subwoofer commands. Commands use the bracket-delimited format [IDENTIFIER>COMMAND=VALUE] with a configurable identifier (default: DEVIALET). The device also supports auto-change notification mode where status is pushed automatically when parameters change.

Transport

protocols:
  - serial
  - tcp  # inferred from known protocol context; no TCP details in source
serial:
  baud_rate: 115200
  data_bits: 8
  parity: none
  stop_bits: 1
  flow_control: none
addressing:
  port: null  # UNRESOLVED: TCP port not stated in source
auth:
  type: none  # inferred: no auth procedure in source

Traits

traits:
  - powerable    # inferred from POWER on/off/toggle commands
  - queryable    # inferred from query commands (POWER=?, SOURCE=?, VOLUME=?, etc.)
  - levelable    # inferred from VOLUME set/increment/decrement commands
  - routable     # inferred from SOURCE selection commands

Actions

commands:
  - id: power_on
    label: Power On
    kind: action
    command: "[DEVIALET>POWER=1]"
    params: []

  - id: power_off
    label: Power Off
    kind: action
    command: "[DEVIALET>POWER=0]"
    params: []

  - id: power_toggle
    label: Power Toggle
    kind: action
    command: "[DEVIALET>POWER=!]"
    params: []

  - id: source_select
    label: Select Source
    kind: action
    command: "[DEVIALET>SOURCE={source}]"
    params:
      - name: source
        type: string
        values:
          - AES/EBU
          - Digital 1
          - Digital 2
          - Digital 3
          - Digital 4
          - Phono 2
          - Line 1
          - Line 2
          - Phono
          - Optical 1
          - Optical 2
          - HDMI
          - Air
          - Brown N
        description: "Source name (configurable; defaults listed)"

  - id: source_previous
    label: Previous Source
    kind: action
    command: "[DEVIALET>SOURCE=--]"
    params: []

  - id: source_next
    label: Next Source
    kind: action
    command: "[DEVIALET>SOURCE=++]"
    params: []

  - id: volume_set
    label: Set Volume
    kind: action
    command: "[DEVIALET>VOLUME={level}]"
    params:
      - name: level
        type: number
        min: -97.5
        max: 30.0
        step: 0.5
        unit: dB
        description: "Volume in dB"

  - id: volume_down
    label: Volume Down
    kind: action
    command: "[DEVIALET>VOLUME=--]"
    params: []

  - id: volume_up
    label: Volume Up
    kind: action
    command: "[DEVIALET>VOLUME=++]"
    params: []

  - id: mute_on
    label: Mute
    kind: action
    command: "[DEVIALET>MUTE=1]"
    params: []

  - id: mute_off
    label: Unmute
    kind: action
    command: "[DEVIALET>MUTE=0]"
    params: []

  - id: mute_toggle
    label: Mute Toggle
    kind: action
    command: "[DEVIALET>MUTE=!]"
    params: []

  - id: phase_normal
    label: Normal Phase
    kind: action
    command: "[DEVIALET>PHASE=0]"
    params: []

  - id: phase_invert
    label: Invert Phase
    kind: action
    command: "[DEVIALET>PHASE=1]"
    params: []

  - id: phase_toggle
    label: Phase Toggle
    kind: action
    command: "[DEVIALET>PHASE=!]"
    params: []

  - id: preout_enable
    label: Enable PreOut
    kind: action
    command: "[DEVIALET>PREOUT=1]"
    params: []

  - id: preout_disable
    label: Disable PreOut
    kind: action
    command: "[DEVIALET>PREOUT=0]"
    params: []

  - id: preout_toggle
    label: PreOut Toggle
    kind: action
    command: "[DEVIALET>PREOUT=!]"
    params: []

  - id: riaa_1976
    label: RIAA Curve 1976
    kind: action
    command: "[DEVIALET>RIAA=1]"
    params: []

  - id: riaa_1953
    label: RIAA Curve 1953
    kind: action
    command: "[DEVIALET>RIAA=0]"
    params: []

  - id: riaa_toggle
    label: RIAA Curve Toggle
    kind: action
    command: "[DEVIALET>RIAA=!]"
    params: []

  - id: subsonic_filter_enable
    label: Enable Subsonic Filter
    kind: action
    command: "[DEVIALET>SUBSONIC_FILTER=1]"
    params: []

  - id: subsonic_filter_disable
    label: Disable Subsonic Filter
    kind: action
    command: "[DEVIALET>SUBSONIC_FILTER=0]"
    params: []

  - id: subsonic_filter_toggle
    label: Subsonic Filter Toggle
    kind: action
    command: "[DEVIALET>SUBSONIC_FILTER=!]"
    params: []

  - id: subwoofer_enable
    label: Enable Subwoofer
    kind: action
    command: "[DEVIALET>SUBWOOFER=1]"
    params: []

  - id: subwoofer_disable
    label: Disable Subwoofer
    kind: action
    command: "[DEVIALET>SUBWOOFER=0]"
    params: []

  - id: subwoofer_toggle
    label: Subwoofer Toggle
    kind: action
    command: "[DEVIALET>SUBWOOFER=!]"
    params: []

Feedbacks

feedbacks:
  - id: power_state
    label: Power State
    query: "[DEVIALET>POWER=?]"
    response_format: "[DEVIALET>POWER={value}]"
    type: enum
    values: ["0", "1"]

  - id: start_state
    label: Start State
    query: "[DEVIALET>START=?]"
    response_format: "[DEVIALET>START={value}]"
    type: enum
    values: ["0", "1"]
    description: "Returns 1 when unit is starting (meanwhile POWER=0)"

  - id: stop_state
    label: Stop State
    query: "[DEVIALET>STOP=?]"
    response_format: "[DEVIALET>STOP={value}]"
    type: enum
    values: ["0", "1"]
    description: "Returns 1 when unit is stopping (meanwhile POWER=0)"

  - id: source
    label: Current Source
    query: "[DEVIALET>SOURCE=?]"
    response_format: "[DEVIALET>SOURCE={value}]"
    type: string

  - id: volume
    label: Volume Level
    query: "[DEVIALET>VOLUME=?]"
    response_format: "[DEVIALET>VOLUME={value}]"
    type: number
    min: -97.5
    max: 30.0
    step: 0.5
    unit: dB

  - id: mute_state
    label: Mute State
    query: "[DEVIALET>MUTE=?]"
    response_format: "[DEVIALET>MUTE={value}]"
    type: enum
    values: ["0", "1"]

  - id: phase_state
    label: Phase State
    query: "[DEVIALET>PHASE=?]"
    response_format: "[DEVIALET>PHASE={value}]"
    type: enum
    values: ["0", "1"]

  - id: preout_state
    label: PreOut State
    query: "[DEVIALET>PREOUT=?]"
    response_format: "[DEVIALET>PREOUT={value}]"
    type: enum
    values: ["0", "1"]

  - id: riaa_state
    label: RIAA Curve
    query: "[DEVIALET>RIAA=?]"
    response_format: "[DEVIALET>RIAA={value}]"
    type: enum
    values: ["0", "1"]
    description: "0 = RIAA 1953, 1 = RIAA 1976"

  - id: subsonic_filter_state
    label: Subsonic Filter State
    query: "[DEVIALET>SUBSONIC_FILTER=?]"
    response_format: "[DEVIALET>SUBSONIC_FILTER={value}]"
    type: enum
    values: ["0", "1"]

  - id: subwoofer_state
    label: Subwoofer State
    query: "[DEVIALET>SUBWOOFER=?]"
    response_format: "[DEVIALET>SUBWOOFER={value}]"
    type: enum
    values: ["0", "1"]

Variables

variables:
  - id: identifier
    label: Device Identifier
    type: string
    default: DEVIALET
    description: "Configurable identifier used in command framing [IDENTIFIER>...]"
    # UNRESOLVED: configurator details not documented

Events

# In "auto change notification" mode, the device automatically sends status
# updates when a parameter is changed by remote or other means.
# UNRESOLVED: exact format of unsolicited notifications not specified in source

Macros

# UNRESOLVED: no multi-step sequences described in source

Safety

confirmation_required_for: []
interlocks: []
# UNRESOLVED: non-power commands are only available when POWER=1, but no explicit
# interlock behavior or error response documented for commands sent while powered off

Notes

  • Commands use the format [IDENTIFIER>COMMAND=VALUE] where the identifier is configurable via the Devialet Configurator (default: DEVIALET).
  • Three operating modes: (1) Command Acknowledge — device responds with command echo and ACK; (2) Auto Change Notification — device pushes status automatically on remote/local changes; (3) Echo Chaining — device repeats all received bytes on the TX bus.
  • Baud rate is configurable from 9600 to 115200 via the Configurator; default is 115200.
  • Source names are configurable via the Configurator; listed names are defaults.
  • Volume range: -97.5 dB to 30.0 dB in 0.5 dB steps.
  • Answer to a query is the corresponding command with the current value, e.g. [DEVIALET>VOLUME=?] → [DEVIALET>VOLUME=12.5].
  • SOURCE=-- cycles to previous source, SOURCE=++ cycles to next source through the source list.
  • Trigger I/O uses a standard 3.5 mm stereo jack, TTL-compatible up to 12V, for remote power on/off.

Provenance

source_domains:
  - devialet.com
source_urls:
  - https://www.devialet.com/en-us/docs/D-Premier-RS232.pdf
retrieved_at: 2026-04-30T04:26:29.627Z
last_checked_at: 2026-04-23T15:40:48.640Z

Verification Summary

verdict: verified
checked_at: 2026-04-23T15:40:48.640Z
matched_actions: 38
action_count: 38
confidence: medium
summary: "Every spec action matched literally in source; all transport parameters verified; no additional commands in source; full bidirectional coverage achieved. (10 unresolved item(s) noted in Known Gaps.)"

Known Gaps

- "TCP/IP control indicated as known protocol but no TCP port or addressing details found in this source"
- "trigger I/O (3.5 mm jack) documented but not a machine-serializable protocol"
- "TCP port not stated in source"
- "configurator details not documented"
- "exact format of unsolicited notifications not specified in source"
- "no multi-step sequences described in source"
- "non-power commands are only available when POWER=1, but no explicit"
- "TCP/IP transport details (port, connection lifecycle, framing) not in this source"
- "Configurator software details and configuration protocol not documented"
- "exact ACK response format beyond the single example"

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