The Khadas Tone Board is a USB external Hi-Fi sound card specially developed for Khadas VIM SBCs by Khadas. Its superior performance and compatibility take the audio/visual experience to a whole new level. We integrated the advanced XMOS multi-core RISC micro-controller and ESS flagship 32-bit stereo mobile audio DAC ES9038Q2M into a small PCB. At the same time, we selected three independent high-performance OPAs and four ultra-low phase jitter oscillators for the audio system. Each power path is controlled by a separate ultra-low noise CMOS linear regulator with an OPA of ± 5.5V. In addition to the powerful hardware configuration, we also maximize the performance through excellent PCB design.

Model:

VIMs Edition:
- Has a 40-pin GPIO header soldered on.
- Able to dock with Khadas VIM1, VIM2 and Edge-V SBCs.
- Able to connect via USB-C to USB-A 2.0 Cable（white） to desktop PCs, laptops, Raspberry Pis, and other 3rd party SBCs.
Generic Edition:
- 40-pin GPIO is absent.
- Only able to connect via USB-C to USB-A 2.0 Cable（white）to desktop PCs, laptops, Raspberry Pis, and other 3rd party SBCs.

Features & Specifications:

XMOS XU208-128-QF48: 8 xCores up to 500MIPS, fully compliant with USB 2.0 specifications.
Very Quiet Power Supply: Ultra-low noise, high PSRR LDO for powering Hi-Fi applications.
RCA Connectors: High-quality RCA to deliver audio with tiny, clear, powerful and rich sound details.
ESS ES9038Q2M DAC: Industry's highest performing 32-bit mobile DAC with unprecedented dynamic range and ultra-low distortion.
Accurate Low Noise Clock: Ultra-low phase-noise crystal oscillators with superior phase-noise characteristics.

Compatibility:

VIMs Edition:
- Edge-V
- VIM3 (v11 and higher)
- VIM2 (v1.4 and higher)
- VIM1 (all versions)
- All other devices via included USB-C to USB-A 2.0 Cable（white color)
Generic Edition:
- Desktop PCs
- Laptop PCs
- Edge, Raspberry Pis and other SBCs
- All other devices via included USB-C to USB-A 2.0 Cable（white color)