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Digital Interface Module SRC AK4137 I2S USB Optical 32bit 384kHz DSD256 avec Écran
This extremely versatile digital interface module is equipped with an AK4137EQ AKM Sampling Rate Converter (SRC) chip at the heart of its architecture. This chip supports high sampling rates up to 32bit 768kHz in PCM and up to DSD256 and will allow you to enjoy your high resolution files for an incredibly accurate music experience. On the connector side, there is a Toslink optical input and an I2S output on a 20-pin connector. It is then possible to add AES, Coaxial, BNC and USB input via an XMOS or Amanero interface. The interface managing SPDIF flows is an AKM AK4118AEQ chip, which considerably reduces jitter. In the same idea of reducing the jitter, the module includes two clocks of different frequencies for a perfect synchronization of the signals.
The module is delivered with an OLED screen displaying the active source, file format, sampling rate or filter. The display simply connects to a dedicated port.
It is possible to select the origin of the MCLK signal. The MCLK signal comes from the AK4137 chip, the contacts J1 being connected. By removing the solder between these contacts J1 and connecting the contacts J2, the MCLK signal will then come from the oscillators.
| Pin number | Description |
| 1 | NC |
| 2 | NC |
| 3 | DA (DATA/DSD_R) |
| 4 | BC (BCK/DSD_BCK) |
| 5 | LR (LRCK/DSD_L) |
| 6 | MC (MCLK) |
| 7 | DE (DSD_ON) |
| 8 | G (GND) |
| 9 | NC |
| 10 | NC |
| 11 | MU (Mute) |
| 12 | NC |
| 13 | G (GND) |
| 14 | G (GND) |
| 15 | G (GND) |
| 16 | NC |
| 17 | F3 (signal sampling rate) |
| 18 | F2 (signal sampling rate) |
| 19 | F1 (signal sampling rate) |
| 20 | F0 (signal sampling rate) |
| Pin number | Description |
| 1 | NC |
| 2 | SC (SCL) |
| 3 | DA (DATA/DSD_L) |
| 4 | BC (BCK/DSD_BCK) |
| 5 | LR (LRCK/DSD_R) |
| 6 | MC (MCLK) |
| 7 | DE (DSD_ON) |
| 8 | G (GND) |
| 9 | V3 (Sortie 3.3V) |
| 10 | V3 (Sortie 3.3V) |
| 11 | MU (Mute) |
| 12 | SD (SDA) |
| 13 | G (GND) |
| 14 | G (GND) |
| 15 | G (GND) |
| 16 | MK (Mute_K) |
| 17 | NC |
| 18 | F2 (signal sampling rate) |
| 19 | F1 (signal sampling rate) |
| 20 | F0 (signal sampling rate) |
The following table shows the sampling rates that can be selected using pins F0, F1, F2 and DSD_ON. Pin F3 is always at 0V. A check mark corresponds to a high level 3.3V signal and a cross to a low level 0V signal.
| 44.1kHz | 48kHz | 88.2kHz | 96kHz | 176kHz | 192kHz | 352kHz | 384kHz | DSD64kHz | DSD128kHz | DSD256kHz | |
| F0 | |||||||||||
| F1 | |||||||||||
| F2 | |||||||||||
| DSD_ON |
| 1 | Active input |
| 2 | File format |
| 3 | Mute |
| 4 | Input sampling rate |
| 5 | Active filter |
| 6 | Dither |
| 7 | Output sampling rate |
| 8 | Output sampling rate |
| I32B | 32bit, I2S |
| I24B | 24bit, I2S |
| I20B | 20bit, I2S |
| I16B | 16bit, I2S |
| R32B | 32bit, Right Justified |
| R24B | 24bit, Right Justified |
| R20B | 20bit, Right Justified |
| R16B | 16bit, Right Justified |
| L32B | 32bit, Left Justified |
| L24B | 24bit, Left Justified |
| L20B | 20bit, Left Justified |
| L16B | 16bit, Left Justified |
| DSD | DSD output format |
| AUTO FS | 32bit, I2S output, automatic sampling rate |
| F1 | Sharp Roll-Off Filter |
| F2 | Slow Roll-Off Filter |
| F3 | Short Delay Sharp Roll-Off Filter |
| F4 | Short Delay Slow Roll-Off Filter |
| Specifications | ||
|---|---|---|
| Product type | Digital interface module | |
| SRC Chip | AKM AK4137EQ | |
| SPDIF Interface chip | AKM AK4118AEQ | |
| Supported sampling rates | Optical, Coaxial, RCA, AES : PCM up to 24bit 192kHz USB (with XMOS / Amanero interface, sold separately) : PCM up to 32bit 384kHz - DSD up to DSD256 | |
| Inputs | 1x Optical Toslink 1x Slot for USB XMOS or Amanero interface (interface sold separately) 1x Slot for AES (connector sold separately) 1x Slot for Coaxial RCA (connector sold separately) 1x Slot for BNC connector (connector sold separately) | |
| Output | 1x I2S 20 pins | |
| general | ||
|---|---|---|
| Power supply | 5V DC on screw terminal (power supply sold separately) | |
| Dimensions | 105 x 71.3mm | |
| Screen module dimensions | 35.4 x 33.7mm | |
| Screen module mouting holes spacing | 30 x 29mm | |
| Fixation holes spacing | 84 x 62mm | |
| Package | 1x AK4137 Interface module 1x Screen Screen screws | |
| Input | SPDIF |
| Input | XLR |
| Input | Optical Fiber |
| Output | I2S |
| Max sampling rate | 384kHz |
| Max sampling rate | DSD256 |
| Channel | 2 (Stereo) |
| Interface chip | AK4118 |
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