ECHO Pro Activation
ECHO Pro costs ¥69.99 and is provided through the sponsorship channel. After purchasing it on Afdian, copy the complete order number, usually starting with 2026, and activate it inside ECHO.
PCM and SDM for Pro users
Section titled “PCM and SDM for Pro users”- ECHO PCM / SRC upsampling applies high-quality sample-rate conversion after decoding. It follows the 44.1 kHz and 48 kHz rate families and exposes multiplier, filter, quality, and CPU / CUDA choices. The result remains PCM.
- ECHO SDM / PCM-to-DSD oversamples and filters PCM, then uses sigma-delta modulation and noise shaping to generate 1-bit DSD / SDM. It is not native DSD passthrough or ordinary PCM upsampling, and it requires a compatible DAC, driver, and enough real-time compute.
Higher rates are not automatically better. Start SDM at a lower DSD rate, stay within the DAC’s documented capabilities, and return to PCM immediately if you hear noise or dropouts, get silence, or cannot open the device.
- Open ECHO Next.
- Go to
Settings -> General. - Open
Pro Activation. - Choose the Afdian order activation mode.
- Paste the complete order number starting with
2026. - Follow the page prompt to finish activation.
ECHO Pro is bound to the current device HWID. Do not publish or share your order number. If activation, HWID binding, unbinding, or Pro entitlement has problems, report it in the ECHO Pro group with your order number, ECHO version, system version, screenshot, and exact error message.