Contour Guide Devices Install 中文
Moondrop Echo-A EQ app for Android
Contour EQ is a free, open-source Android app that reads and writes the parametric EQ stored inside the Moondrop Echo-A. The EQ is written into the dongle itself, so it works in every app, with no system equaliser.
Stable 1.6.6
What Contour does on the Echo-A
| Supported since | Contour 1.6.0 |
|---|---|
| USB ID (VID:PID) | 3302:12C5 |
| Chip / protocol | WalkPlay |
| EQ | Read and write; every send is read back from the DAC. The filters are computed for the 93 750 Hz the DSP runs at. |
| Bands | 8 |
| Filter types | PEAK, LOW SHELF, HIGH SHELF, LOW PASS, HIGH PASS |
| Gain | -10 to +10 dB |
| Q | 0.1 to 10 |
| Frequency | 20 Hz to 20 kHz |
| Preamp | up to 0 dB |
| Where the EQ is kept | In the DAC's memory. |
| Tested | By the developer on hardware and on a test rig, October 2026, firmware 0.1. |
What Contour does not do on the Echo-A
- Firmware updates.
- A positive preamp. The preamp goes up to 0 dB.
- A native HIGH SHELF. Contour makes it from a LOW SHELF and the preamp, so its gain goes in whole dB.
- DAC settings, hardware volume and resetting the DAC.
Contour EQ and Moondrop's own software
Moondrop's own tools, Moondrop Hub and Moondrop Link, do not list the Echo-A, and Moondrop's product page for it mentions no EQ or app control. The Echo-A uses the WalkPlay protocol, and Contour drives it with the same code as the CrinEar Protocol Micro. Contour runs on the Android phone the dongle is plugged into, keeps your profiles in a library on the phone and needs no internet or account.
Using Contour with the Echo-A
- Send a profile with HOLD TO SEND. Contour reads every band back from the DAC.
- A HIGH SHELF goes in whole dB. Contour makes it from a LOW SHELF and the preamp, and may lower the preamp to fit it, for example from -6 to -9 dB.
- Keep the preamp at 0 dB or below. Contour does not send a positive preamp to the Echo-A.
Everything else works the same on every DAC: How to use Contour.
Questions about the Echo-A
Is there an EQ app for the Moondrop Echo-A on Android?
Yes. Contour EQ reads and writes the Echo-A's 8-band EQ and preamp from an Android phone. It is free and open source (Apache 2.0). Moondrop Hub and Moondrop Link do not list the Echo-A.
Do I need a driver or root?
No. Android supports USB audio dongles out of the box, and Contour talks to the Echo-A over USB after you allow it in Android's permission prompt. No root, no extra driver.
Echo-A specs and prices on soundblooms.com