Contour Guide Devices Install 中文
FiiO K13 R2R EQ app for Android
Contour EQ is a free, open-source Android app that reads and writes the parametric EQ stored inside the FiiO K13 R2R. The EQ stays in the DAC, so it works in every app and on every device you plug it into.
Stable 1.6.6
What Contour does on the K13 R2R
| Supported since | Contour 1.4.1 |
|---|---|
| USB ID (VID:PID) | 2972:0120 |
| Chip / protocol | FiiO |
| EQ | Read and write to USER1 to USER10; every send is read back from the DAC |
| Bands | 10 |
| Filter types | PEAK, LOW SHELF, HIGH SHELF, BAND PASS, LOW PASS, HIGH PASS, ALL PASS |
| Gain | -24 to +12 dB |
| Q | 0.1 to 10 |
| Frequency | 20 Hz to 20 kHz |
| Preamp | -24 to 12 dB |
| Where the EQ is kept | In the USER slot you pick, USER1 to USER10, which becomes the active one. The slot keeps all ten bands and the preamp after a power cycle. The K13 stores no slot names; Contour shows the profile last sent to each slot. |
| Tested | By the developer on hardware and on a test rig, October 2026, firmware 1.15. |
What Contour does not do on the K13 R2R
- Firmware updates.
- A DAC page. The K13 has no DAC page in Contour yet.
- Renaming slots. The slots keep their USER names.
- Hardware volume.
- Resetting the DAC.
Contour EQ and FiiO Control
FiiO's own tools for the K13 R2R are the FiiO Control app and FiiO's web app. FiiO Control reaches the K13 over Bluetooth only; over USB, FiiO's only tool is the PEQ in its web app. Over Bluetooth, FiiO Control also has the K13's input source, lights, device name and Clear pairing, which Contour does not offer. Contour works over USB from the Android phone the K13 is plugged into, keeps your profiles in a library on the phone and needs no internet or account.
Using Contour with the K13 R2R
- Pick a slot from 1 to 10 above HOLD TO SEND. Contour writes the profile to that slot and makes it the active one. A shorter profile is filled up with flat bands, because the K13 always holds ten.
- A send takes about five seconds: the K13 needs a short pause after each write to keep it after you turn it off.
- Switch to BYPASS or a stock preset on the K13 itself.
Everything else works the same on every DAC: How to use Contour.
Questions about the K13 R2R
Is there an EQ app for the FiiO K13 R2R on Android?
Yes. Contour EQ reads and writes the K13 R2R's 10-band EQ and preamp in its ten USER slots from an Android phone. It is free and open source (Apache 2.0).
Which FiiO software works with the K13 R2R?
Over USB, FiiO's web app has the PEQ. The FiiO Control app reaches the K13 over Bluetooth only. Contour EQ works over USB from an Android phone.
Can Contour update the K13 R2R's firmware?
No. Contour does not update firmware. It reads and writes the EQ and the preamp in the USER slots.
Do I need a driver or root?
No. Android supports USB audio devices out of the box, and Contour talks to the K13 R2R over USB after you allow it in Android's permission prompt. No root, no extra driver.
K13 R2R specs and prices on soundblooms.com
How Contour and FiiO Control compare on the K13 R2R and the other FiiO and SnowSky DACs: Contour EQ or FiiO Control.