AI4AVSummary
The DD8P is a multi-channel audio processor controlled over TCP via an embedded HTTP server accepting JSON request/response packets. Clients send HTTP GET to query state and HTTP POST to change settings. No authentication required.
Transport
protocols:
- http
- tcp
addressing:
base_url: http://{device_ip}
auth:
type: none # inferred: no auth procedure in source
Traits
- queryable # GET /info, /settings, /status, /input, /output, /channel, /pair
- routable # input_mix / output_mix routing matrices
- levelable # volume, trim_volume, bass_boost, treble_boost, limiter, hpf/lpf freq
Actions
- id: get_info
label: Get Device Info
kind: action
params: []
- id: get_settings
label: Get Settings
kind: action
params: []
- id: set_settings
label: Set Settings
kind: action
params:
- name: settings
type: object
description: Subset of settings object (max 512 bytes)
- id: get_status
label: Get Status
kind: action
params: []
- id: get_input
label: Get Input Settings
kind: action
params:
- name: input_idx
type: integer
description: Input index 0-18
- id: set_input
label: Set Input Settings
kind: action
params:
- name: input_idx
type: integer
description: Input index 0-18
- name: settings
type: object
description: "input_mix array or name"
- id: get_output
label: Get Output Settings
kind: action
params:
- name: output_idx
type: integer
description: Output index 0-7
- id: set_output
label: Set Output Settings
kind: action
params:
- name: output_idx
type: integer
description: Output index 0-7
- name: settings
type: object
description: "mute, dim, volume, turn_on_volume, max_volume, limiter, output_mix"
- id: get_channel
label: Get Channel Settings
kind: action
params:
- name: channel_idx
type: integer
description: Channel index 0-7 (channels A-H)
- id: set_channel
label: Set Channel Settings
kind: action
params:
- name: channel_idx
type: integer
description: Channel index 0-7
- name: settings
type: object
description: "trim_volume, volume, mute, bass_boost, treble_boost, hpf, lpf, delay"
- id: get_peq
label: Get PEQ Band
kind: action
params:
- name: channel_idx
type: integer
description: Channel index 0-7
- name: band_idx
type: integer
description: PEQ band index 0-9
- id: set_peq
label: Set PEQ Band
kind: action
params:
- name: channel_idx
type: integer
description: Channel index 0-7
- name: band_idx
type: integer
description: PEQ band index 0-9
- name: settings
type: object
description: "enab, gain, freq, q"
- id: get_pair
label: Get Channel Pair Settings
kind: action
params:
- name: pair_idx
type: integer
description: Pair index 0-3
- id: set_pair
label: Set Channel Pair Settings
kind: action
params:
- name: pair_idx
type: integer
description: Pair index 0-3
- name: settings
type: object
description: "mode"
Feedbacks
- id: device_info
type: object
description: "/info response"
fields:
device_type: string
device_name: string
mac: string
ip: string
app_version: string
boot_version: string
build: string
- id: settings_state
type: object
description: "/settings response - includes device_name, use_static_ip, static_ip, netmask, gateway, preset_settings_modified, loaded_preset, config_name, preset_names, auto_powerdown, green_mode"
- id: status_state
type: object
description: "/status response"
fields:
cfg_change_ctr: integer
sig_present: array of boolean # signal present per output
sig_clip: array of boolean # clip indicator per output
trigger_in: integer
- id: input_state
type: object
description: "/input/INPUT_IDX response"
fields:
input_id: integer
name: string
input_mix: array of float # routing mix coefficients
- id: output_state
type: object
description: "/output/OUTPUT_IDX response"
fields:
output_id: integer
name: string
mute: boolean
dim: boolean
volume: float # dB
turn_on_volume: float # dB
max_volume: float # dB
limiter: float # dB threshold, 0 = disabled
output_mix: array of float # routing mix coefficients
- id: channel_state
type: object
description: "/channel/CHANNEL_IDX response"
fields:
ch_id: integer
trim_volume: float # dB
volume: float # dB
mute: boolean
bass_boost: float # dB
treble_boost: float # dB
hpf: object # {mode: integer, freq: integer}
lpf: object # {mode: integer, freq: integer}
delay: integer # 48kHz samples, 0-720
- id: peq_state
type: object
description: "/channel/CHANNEL_IDX/peq/BAND_IDX response"
fields:
ch_id: integer
band_id: integer
enab: boolean
gain: float # dB
freq: integer # Hz
q: float
- id: pair_state
type: object
description: "/pair/PAIR_IDX response"
fields:
pair_id: integer
mode: integer
Variables
- id: auto_powerdown
type: boolean
writable: true
description: Auto power-down enable (0=Off, 1=On)
- id: green_mode
type: boolean
writable: true
description: Green mode enable (0=Off, 1=On)
- id: device_name
type: string
writable: true
description: Device name, advertised to DHCP server
- id: use_static_ip
type: boolean
writable: true
description: Use static IP instead of DHCP
- id: static_ip
type: string
writable: true
description: Static IP address (aaa.bbb.ccc.ddd)
- id: netmask
type: string
writable: true
description: Netmask (aaa.bbb.ccc.ddd)
- id: gateway
type: string
writable: true
description: Gateway IP (aaa.bbb.ccc.ddd)
Events
# UNRESOLVED: no unsolicited event notifications described in source
Macros
# UNRESOLVED: no multi-step macros documented in source
Safety
confirmation_required_for: []
interlocks: []
Notes
- TCP connection is single-session; server drops connection seconds after last activity. Poll ~once per second to keep alive.
- POST messages must be < 512 bytes.
- POST /settings responds with cfg_change_ctr for change detection.
- Server supports persistent (keep-alive) TCP connections.
Provenance
source_domains:
- lexicon.com
source_urls:
- "https://www.lexicon.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dwa48ad2d8/pdfs/Lexicon DD-8P_IP Control_Protocol.pdf"
- https://www.lexicon.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dwaf911684/pdfs/Lexicon_DD-8p_Network_and_Firmware_Guide.pdf
retrieved_at: 2026-05-21T05:56:02.857Z
last_checked_at: 2026-05-26T20:04:55.392Z
Verification Summary
verdict: verified
checked_at: 2026-05-26T20:04:55.392Z
matched_actions: 14
action_count: 14
confidence: medium
summary: "All 14 spec actions map cleanly to source endpoints; transport parameters verified; source command catalogue fully represented. (5 unresolved item(s) noted in Known Gaps.)"
Known Gaps
- "port number not stated in source — device uses port 80 by default but explicit port not documented"
- "no unsolicited event notifications described in source"
- "no multi-step macros documented in source"
- "port number not stated — default HTTP port 80 typical but not confirmed in source"
- "power on/off commands not present in source — only auto_powerdown setting"
From the AI4AV catalog (https://ai4av.net) · ODbL-1.0