Contour Guide Devices Install 中文
FiiO KA15 EQ app for Android
Contour EQ is a free, open-source Android app that reads and writes the parametric EQ stored inside the FiiO KA15. The EQ stays in the dongle, so it works in every app and on every device you plug it into.
Stable 1.6.6
What Contour does on the KA15
| Supported since | Contour 1.3.2 |
|---|---|
| USB ID (VID:PID) | 2972:0104 |
| Chip / protocol | FiiO |
| EQ | Read and write to USER1, USER2 and USER3; every send is read back from the DAC. Slot names are read and written, and a slot can be renamed |
| 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 | -24 to 0 dB, whole dB |
| Where the EQ is kept | In the USER slot you pick: USER1, USER2 or USER3, named after the profile (up to 7 letters and digits). The EQ and the slot name stay after unplugging. |
| DAC page | Since 1.6.0: VOLUME, VOLUME STEPS, BALANCE, FILTER, OUTPUT, DRE, BRIGHTNESS, SCREEN OFF, ROTATION and LANGUAGE; USB AUDIO is shown, read-only. FACTORY RESET saves a copy of your USER slots, their names and the settings on the phone first. |
| Tested | By the developer on hardware and on a test rig, October 2026, firmware 1.1.6. |
What Contour does not do on the KA15
- Firmware updates.
- Changing USB AUDIO. The DAC page shows it, but Contour does not change it.
Contour EQ and FiiO Control
FiiO's own tools for the KA15 are the FiiO Control app and FiiO's web app. FiiO's app shows the values the KA15 stores, so its shelf Q and preamp look higher than what the KA15 plays. Since 1.3.3 Contour compensates both, so the curve and the preamp it shows are what the KA15 plays. FiiO's tools do not offer a factory reset for the KA15; Contour's DAC page has FACTORY RESET, which saves a copy of your slots and settings first. 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 KA15
- Pick USER1, USER2 or USER3 above HOLD TO SEND. Contour writes the profile to that slot and names the slot after it. Long-press a slot to rename it without changing its EQ.
- The KA15 answers only while audio is streaming to it, so Contour plays a silent stream to it while it reads or writes. Your music keeps playing.
- If the KA15 stops answering after a save, unplug it and plug it back in.
Everything else works the same on every DAC: How to use Contour.
Questions about the KA15
Is there an EQ app for the FiiO KA15 on Android?
Yes. Contour EQ reads and writes the KA15's 10-band EQ and preamp in its USER slots from an Android phone. 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 EQ work on a PC or an iPhone?
Yes. The EQ is stored in the KA15, so it plays on every device you plug the dongle into, PCs, Macs and iPhones included. You need an Android phone only to change it with Contour.
Can Contour update the KA15'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, and shows the firmware version at the top of 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 KA15 over USB after you allow it in Android's permission prompt. No root, no extra driver.
KA15 specs and prices on soundblooms.com
How Contour and FiiO Control compare on the KA15 and the other FiiO and SnowSky DACs: Contour EQ or FiiO Control.