FiiO JadeAudio JA11 EQ app for Android
Contour EQ is a free, open-source Android app that reads and writes the parametric EQ stored inside the FiiO JadeAudio JA11. The EQ stays in the dongle, so it works in every app and on every device you plug it into.
Stable 1.8.0
Install ContourWhat Contour does on the JA11
| Bands | Filter typesPKLSHSLPHPBPAP | Kept in the DAC | DAC settings in the app |
|---|---|---|---|
| 5 bands | 1 EQ | DAC settings: Volume, In-line mic |
| Supported since | Contour 1.7.0 |
|---|---|
| USB ID (VID:PID) | 2972:0102 |
| Chip / protocol | FiiO |
| EQ | Read and write to USER1; every send is read back from the DAC once it is back on USB |
| Bands | 5 |
| Filter types | PEAK, LOW SHELF, HIGH SHELF, LOW PASS, HIGH PASS |
| Gain | -12 to +12 dB |
| Q | 0.1 to 10 |
| Frequency | 20 Hz to 20 kHz |
| Preamp | -24 to 0 dB |
| Where the EQ is kept | In USER1, the JA11's one custom slot. Contour selects USER1, writes it and saves it, and the JA11 then drops off USB for about 2 seconds. The EQ and the preamp stay after unplugging, and the JA11 starts on USER1. |
| DAC page | Since 1.7.0: VOLUME (0 to 60) and IN-LINE MIC (OFF / ON); USB AUDIO is shown, read-only. Each change is read back. An IN-LINE MIC change makes the JA11 reconnect on USB, so Contour reads it once the JA11 is back. |
| Tested | By the developer on hardware and on a test rig, November 2026, firmware V2.2 (USB version 2.20). |
Using Contour with the JA11
- Send a profile with HOLD TO SEND. Contour selects USER1, writes the bands and the preamp and saves them. The JA11 then drops off USB for about 2 seconds and comes back on its own; Contour reads every band back once it is back.
- Android may ask again for permission to use the JA11 after each send and after each IN-LINE MIC change, because the DAC reconnects on USB. Allow it, and Contour finishes the read-back.
- A new JA11 comes set to Close EQ, with its EQ off. The first send switches it to USER1, so the EQ plays from then on.
Everything else works the same on every DAC: How to use Contour.
Contour EQ and FiiO Control
FiiO's own app for the JA11 is FiiO Control. Both offer 5 bands from 20 Hz to 20 kHz, -12 to +12 dB, Q 0.1 to 10, a preamp, VOLUME and the in-line mic switch. FiiO Control offers PEAK, LOW SHELF and HIGH SHELF; Contour adds LOW PASS and HIGH PASS, which the JA11 played as pass filters on a test rig. FiiO Control also switches the JA11's stock presets, which Contour leaves alone. 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.
Questions about the JA11
Is there an EQ app for the FiiO JA11 on Android?
Yes. Contour EQ reads and writes the JA11's 5-band EQ and preamp in USER1 from an Android phone, with LOW PASS and HIGH PASS next to FiiO's own filter types, and sets VOLUME and IN-LINE MIC on its DAC page. It is free and open source (Apache 2.0). FiiO's own app for this DAC is FiiO Control.
Can Contour update the JA11's firmware?
No. Contour does not update firmware. It reads and writes the EQ, the preamp, VOLUME and IN-LINE MIC. It was tested on firmware V2.2 (the USB version reads 2.20); other firmware versions have not been tried.
Do I need a driver or root?
No. Android supports USB audio dongles out of the box, and Contour talks to the JA11 over USB after you allow it in Android's permission prompt. No root, no extra driver.
Other DACs Contour supports
Same chip / protocol: FiiO
- FiiO KA15
- FiiO K13 R2R Desktop DAC
- FiiO JadeAudio JIEZI
- SnowSky Melody
- SnowSky Tiny A
- SnowSky RETRO NANO