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DAC Audio Decoder Board for Raspberry Pi 3B+/ 4B
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Related Product: Raspberry Pi Power Filter BoardThis Raspberry Pi DAC Audio Decoder Board supports I2S/DSD/coaxial input, analog/coaxial/optical/I2S output, ...
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Related Product: Raspberry Pi Power Filter Board
This Raspberry Pi DAC Audio Decoder Board supports I2S/DSD/coaxial input, analog/coaxial/optical/I2S output, 384K/32Bit decoding function and unique DSD clock de-jitter.
The audio decoder board supports decoding of I2S and DSD digital audio signals output from the Raspberry Pi motherboard, as well as can decode external coaxial signals by setting the three buttons on the board.
Supporting for 7 kinds of audio outputs like analog audio, coaxial, optical fiber, I2S, etc. The audio output signal of each interface can be independently turned on or off through the button on the board.
The board employs four professional chips. Two groups of LDO are designed to power analog and digital circuits separately. Solid capacitors with large capacity and tantalum capacitors are used for filtering and decoupling to ensure a stable and clean power supply and effectively improve the overall SNR (signal to noise ratio).
PCM9211: TI original professional digital audio transceiver chip, up to 216K sampling rate and ultra-low jitter with coaxial transceiver clock less than 50RMS.
PCM5122: TI original DAC (Digital to Analog Converter) decoder chip, up to 384K/32Bit decoding capability, high SNR (signal to noise ratio) of 112dB and high dynamic range. Richer sounding with more details.
LVDS Output: I2S and DSD output employ DS90LV047A high-speed differential driver chip, supporting transmission rate of 200MHz and ensuring distortion-free I2S/DSD signal.
SiTime Crystal: industrial programmable digital silicon oscillators, with ultra-low jitter and extremely-low phase noise.
I2S/DSD adopts HDMI interface and differential signal output, and a better replay effect can be obtained by connecting common HDMI cable to DAC decoder with I2S input.
Onboard OLED Display, the standby interface can display the current track sampling rate, the current decoder board input signal format, I2S interface output format, etc, more intuitive and more convenient to use.
On the standby or Settings interface, long-press the mode key to enter the following three Settings interfaces successively. On the Settings screen, short-press the mode key to switch select setting item. The selected setting item will blink, at the time press the up or down key to set parameters.
IN: I2S/DSD/SPDIF. Select DAC decoder board 12S, DSD, coaxial three input sources
I2S: 3-L/4-L. Set 3-wire I2S (no MCLK) or 4-wire I2S (with MCLK), Raspberry Pi 2B/3B/3B+ needs to be set to 3-L; Raspberry Pi 4B can be set to 3-L or 4-L(requires MCLK main clock)
MCLK: aut/128/256/512. When the I2S is set to 3-L, set the multiple relationship between the recovery system master clock (MCLK) and sampling rate FS. aut is automatic multiple mode, 256FS for 192K below, 128FS for 192K above.
BIT: 16R/24B/24R/24L/32B. When IN is set to I2S, set the bit depth of I2S input/output, L/R stands for left-justified/right-justified format, and B is standard I2S format. (Note that the input and output formats of I2S are the same)
1B When the IN is set to DSD, the bit depth of DSD is 1B and cannot be changed
16R/24B/24R/24L When IN is set to SPDIF, set the bit depth and format of I2S output
FLT: 1/2/3/4/5. Set the filter type used internally by the PCM5122DAC decoder chip to switch between different tones
SPDF: out/off. Enable or disable the coaxial output function
RCA: out/off. Enable or disable the analog audio output function
OPT: out/off. Enable or disable the optical fiber output function
I2S: out/off. Enable or disable the I2S or DSD output function of HDMI
| OutputInput | RCA Analog Audio | 3.5mm headphone jack Analog Audio | Coaxial | Optical Fiber | I2S | DSD
| I2S | YES | YES | YES | YES | YES | NO
| Coaxial | YES | YES | NO | YES | YES | NO
| DSD | NO | NO | NO | NO | NO | YES
Notes:
1.The coaxial interface can be set to either output or input by pressing buttons. You can only choose one.
2.I2S and DSD signals are input from the pins on the Raspberry Pi motherboard. The I2S or DSD signals output by HDMI interface are synchronized with the ones output by Raspberry Pi. PCM9211 chip will de-jitter the DSD clock.
Features
Support I2S/DSD/coaxial input
Analog/coaxial/optical/I2S output
384K/32Bit decoding function
Unique DSD clock de-jitter
Applications
Raspberry Pi Audio Output
Specification
Analog Audio: RCA/headphone jack 32K - 384K/32Bit,
Frequency response bandwidth 20 - 20KHz
Output level 2Vrms
Signal to Noise Ratio (SNR) 120dB
Frequency response bandwidth 20 - 20KHz
Output level 2Vrms
Signal to Noise Ratio (SNR) 120dB
Coaxial: PCM 32K - 192K/24Bit, DOP DOP64
Optical Fiber: PCM 32K - 192K/24Bit, DOP DOP64
I2S: PCM 32K - 384K/32Bit, DOP DOP64/DOP128, DSD DSD64/DSD128
Rated Voltage: +5V (can be powered by the Raspberry Pi motherboard or from the DC socket on the DAC board)
Rated Current: 300mA
Board Dimension: 56mm*65mm/2.20*2.56"
Support Raspberry Pi Model: Raspberry Pi 3B+/4B
Support Players: Volumio, Moode, piCorePlayer, RuneAudio
Shipping List
Raspberry Pi DAC Audio Decoder Board x1
Copper Pillar/Screw/Nut x4
Jargon buster
Plain-language definitions for the technical terms used above.
- DAC
- A digital-to-analogue converter turns numbers from the microcontroller into a real analogue voltage. It matters if you want to generate simple waveforms, audio-style signals, or variable control voltages rather than just on/off outputs.
- differential signal
- A measurement taken between two input wires rather than between one wire and ground. This matters for precision sensors because it can reduce noise and lets the ADC read very small voltage differences more accurately.
- dynamic range
- Dynamic range describes how wide a span of values a sensor can measure, from very low to very high. For a light sensor, a wide dynamic range means it can work in dim indoor settings as well as bright sunlight without changing hardware.
- HDMI
- HDMI is a common digital video and audio connection used by computers, media players, and many displays. If a display kit has HDMI input, it is usually much easier to test with a single-board computer because it can act like a normal monitor.
- I2S
- I2S is a digital audio interface used to send sound data between chips, such as from a microcontroller to an audio amplifier or DAC. It matters if your project needs cleaner digital audio output than a basic buzzer or PWM signal can provide.
- OLED
- OLED stands for organic light-emitting diode, a display type where each pixel produces its own light. It matters because OLED screens are thin, high-contrast and easy to read for small status displays, but they can be more sensitive to image burn-in than some other display types.
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