In the sound folder, I also have
Asobo_B747_8i.PC.PCK and sound.xml

In soundAI I have
Asobo_B747_8i_AI.PC.PCK and soundai.xml

Here is the contents in aircraft.cfg:

[FLTSIM.0]
title=Boeing 777-300ER Captain Sim House 2021 ; Variation name
model= ; model folder
panel= ; panel folder
sound= ; sound folder
texture=CS.2021 ; texture folder
kb_checklists=checklist ; Procedures/Checklist sibling file name
kb_reference=Boeing747-400_ref ; Reference information sibling file name
description=TT:AIRCRAFT.DESCRIPTION ; Variation description.
wip_indicator=2 ; know if the variation is good to go or still WIP : -1=Disabled, 0=Rough, 1=1st Pass, 2=Finished
ui_manufacturer=Boeing
ui_type=777-300ER GE115B ; e.g. 747-400, 172
ui_variation=Captain Sim House 2021 ; e.g. World Air, IFR Panel
ui_typerole=Commercial Airliner ; e.g. Single Engine Prop, Twin Engine Prop, Rotorcraft, etc
ui_createdby=Captain Sim ; e.g. Asobo Studio, Microsoft, FSAddonCompany, etc
ui_thumbnailfile= ; app relative path to ThumbNail image file
ui_certified_ceiling=43100 ; service ceiling / max certified operating altitude (ft)
ui_max_range=7370 ; max distance the aircraft can fly between take-off and landing in (NM)
ui_autonomy=17 ; max duration the aircraft can fly between take-off and landing in (Hrs)
ui_fuel_burn_rate=21160 ; average fuel consumption per hour (lbs/hr) - reminder: fuel density is ~6.7lbs per US gallon
atc_id=CSM773 ; tail number
atc_id_enable=1 ; enable tail number
atc_airline=CAPTAINSIM ; airline name
atc_flight_number=CS777 ; flight number
atc_heavy=1 ; heavy?
atc_parking_types=GATE,RAMP,CARGO ; ANY / RAMP / CARGO / MIL_CARGO / MIL_COMBAT / GATE / DOCK
atc_parking_codes= ; Comma separated and may be as small as one character each
atc_id_color= ; color for the tail number : i.e. #ffff00ff
atc_id_font= ; font for the tail number
isAirTraffic=0 ; Is the plane usable for air traffic
isUserSelectable=1 ; Is the plane selectable by the user
ui_ants=2047

[FLTSIM.1]
title=Boeing 777-300ER British Airways G-STBN
model=
panel=
sound=
texture=1
kb_checklists=checklist
kb_reference=Boeing747-400_ref
description=TT:AIRCRAFT.DESCRIPTION
ui_manufacturer=Boeing
ui_type=777-300ER GE115B
ui_variation=British Airways G-STBN
ui_typerole=Commercial Airliner
ui_createdby=Captain Sim
ui_thumbnailfile=
ui_certified_ceiling=43100
ui_max_range=7370
ui_autonomy=17
ui_fuel_burn_rate=21160
isAirTraffic=0
isUserSelectable=1
wip_indicator=2
atc_id_enable=1
atc_parking_codes=
atc_id_color=
atc_id_font=
atc_id=G-STBN
atc_airline=British Airways
atc_flight_number=777
atc_heavy=1
atc_parking_types=GATE,RAMP,CARGO
ui_ants=2047

[FLTSIM.2]
title=Boeing 777-300ER United 2019 N2251U
model=
panel=
sound=
texture=2
kb_checklists=checklist
kb_reference=Boeing747-400_ref
description=TT:AIRCRAFT.DESCRIPTION
ui_manufacturer=Boeing
ui_type=777-300ER GE115B
ui_variation=United Airlines 2019 N2251U
ui_typerole=Commercial Airliner
ui_createdby=Captain Sim
ui_thumbnailfile=
ui_certified_ceiling=43100
ui_max_range=7370
ui_autonomy=17
ui_fuel_burn_rate=21160
isAirTraffic=0
isUserSelectable=1
wip_indicator=2
atc_id_enable=1
atc_parking_codes=
atc_id_color=
atc_id_font=
atc_id=N2251U
atc_airline=United Airlines
atc_flight_number=777
atc_heavy=1
atc_parking_types=GATE,RAMP,CARGO
ui_ants=2047

[FLTSIM.3]
title=Boeing 777-300ER Air New Zealand black ZK-OKQ
model=
panel=
sound=
texture=3
kb_checklists=checklist
kb_reference=Boeing747-400_ref
description=TT:AIRCRAFT.DESCRIPTION
ui_manufacturer=Boeing
ui_type=777-300ER GE115B
ui_variation=Air New Zealand black ZK-OKQ
ui_typerole=Commercial Airliner
ui_createdby=Captain Sim
ui_thumbnailfile=
ui_certified_ceiling=43100
ui_max_range=7370
ui_autonomy=17
ui_fuel_burn_rate=21160
isAirTraffic=0
isUserSelectable=1
wip_indicator=2
atc_id_enable=1
atc_parking_codes=
atc_id_color=
atc_id_font=
atc_id=ZK-OKQ
atc_airline=Air New Zealand
atc_flight_number=777
atc_heavy=1
atc_parking_types=GATE,RAMP,CARGO
ui_ants=2047