FiiO JIEZI (JadeAudio) 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 JIEZI. The EQ is written into one of the dongle's USER slots, so it works in every app, with no system equaliser.
Stable 1.8.0
Install ContourWhat Contour does on the JIEZI
| Bands | Filter typesPKLSHSLPHPBPAP | Kept in the DAC | DAC settings in the app |
|---|---|---|---|
| 10 bands | 3 slots | DAC settings: Volume, Balance, In-line mic |
| Supported since | Contour 1.8.0 |
|---|---|
| USB ID (VID:PID) | 2972:0151 |
| Chip / protocol | FiiO |
| EQ | Read and write to USER1, USER2 and USER3; every send is read back from the DAC. Slot names are read from the DAC |
| Bands | 10 |
| Filter types | PEAK, LOW SHELF, HIGH SHELF, BAND PASS, LOW PASS, HIGH PASS, ALL PASS |
| Gain | -12 to +12 dB |
| Q | 0.1 to 10 (shelves up to 7.07) |
| Frequency | 20 Hz to 20 kHz |
| Preamp | -12 to +12 dB, whole dB |
| Where the EQ is kept | In the USER slot you pick, USER1, USER2 or USER3, which becomes the active one. The EQ and the preamp stay after unplugging. |
| DAC page | Since 1.8.0: VOLUME, BALANCE and IN-LINE MIC; VOLUME STEPS and USB AUDIO are shown, read-only. Each change is read back. |
| Tested | By the developer on hardware and on a test rig, November 2026. Contour cannot read this DAC's firmware version. |
Using Contour with the JIEZI
- Pick USER1, USER2 or USER3 above HOLD TO SEND. Contour writes the profile to that slot, reads every band back and makes it the active one. A shorter profile is filled up with flat bands, because the JIEZI always holds ten.
- The USER slots keep the names stored in the JIEZI, and Contour shows them. A name you give a slot in Contour is written to the DAC.
- If the JIEZI is on Close EQ, with its EQ off, when you plug it in, the first send switches it to the USER slot you picked, 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 tools for the JIEZI are the FiiO Control app and FiiO's web app. FiiO Control lists 10 bands, all seven filter types, USER1 to USER3 and VOLUME, VOLUME STEPS, BALANCE, IN-LINE MIC and USB AUDIO; FiiO's web app also lists 10 bands. Contour offers the same 10 bands and seven filter types; the open-source devicePEQ web tool lists the JIEZI with 5 bands. 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 JIEZI
Is there an EQ app for the FiiO JIEZI on Android?
Yes. Contour EQ reads and writes the JIEZI's 10-band EQ and preamp in its USER slots from an Android phone, and sets VOLUME, BALANCE and IN-LINE MIC on its DAC page. It is free and open source (Apache 2.0). FiiO's own tools for this DAC are the FiiO Control app and FiiO's web app.
Does the JIEZI have 5 or 10 EQ bands?
10. The JIEZI reports ten bands when Contour reads it, as FiiO Control and FiiO's web app also list. Contour writes all ten.
Can Contour update the JIEZI's firmware?
No. Contour does not update firmware. It reads and writes the EQ, the preamp, the slot names and the settings on the DAC page.
Do I need a driver or root?
No. Android supports USB audio dongles out of the box, and Contour talks to the JIEZI 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 JA11
- SnowSky Melody
- SnowSky Tiny A
- SnowSky RETRO NANO