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HiBy FD1 Spec

Hardware platform

CategoryChip
Main chipNanoC
ScreenNone
LEDRGB (IO driver)
BatteryNone
ChargerNone
USBUSB Audio 1.0、USB Audio 2.0、Type C
KeyPlayback pause, volume up, volume down
DAC chipESS9118 Dual
Xtal22,5792m/24,576m
VolumeNone
AMPNone
Class A Op AmpNone
Class AB Op AmpNone
LineOutNone
PhoneOut3.5mm
Balance LineOutNone
Balance2.5m
Coaxial (SPDIF)None

Software Platform

FeaturesSupported specifications
UAC1.0Support
UAC2.0Support
PCM384k
Native(DSD)DSD256
DoP(DSD)DSD128
MqaMQA Renderer (8x)
USB Hardware Volume *Not supported
Hardware VolumeSupport
Volume LevelLevel 80 [0, 79]
Volume MemorySupport
HID Media KeyPlay Pause, Previous, Next
Play buttonSupport
Volume +Support
Volume -Support
LEDSupport
Headphone OutputSupport
Wireless control (headphone output)Support
Balanced Output (2.5)Support
USB StandardUSB2.0 (USB High Speed)
Synchronous/Asynchronous modeAsynchronous mode
Overheating protectionNone, no power required
Voltage/Short Circuit ProtectionNone

* USB hardware volume means that the volume adjustment function of the host can be controlled through the volume buttons on the device to synchronize the volume between the device and the host. Or you can directly adjust the volume of the device through the volume button on the mobile phone instead of adjusting the amplitude of the digital signal.

Audio specifications

FormatSampling Rate
DSD(DoP)DSD64 ~ DSD128
DSD(Native)DSD64 ~ DSD256
PCM44.1k ~ 384k

Button definition

KeyShort press---
Play PausePlay PauseSingle-key Five Functions
Volume +Increase the volume
Volume -Volume reduction

LED Indicator

StatusColor
NormalRed
PCM(~48k)Blue
PCM(88.2k~192k)/DSD64Green
PCM(352.8k~)Light green

Known issues

The following issues have been fixed in the latest version of the firmware:

  1. Some songs comply with DoP rules, resulting in abnormalities during playback (2022.05.11)
  2. Turn the volume to maximum, re-plug and unplug will return to default; (2023.05.11)
  3. Playing the California Hotel (192k) drums are broken; (about 51s) (2023.06.08)