Contour Guide Devices Install 中文
CrinEar Protocol Max EQ app for Android
Contour EQ is a free, open-source Android app that writes the parametric EQ stored inside the CrinEar Protocol Max and reads every send back. 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 Protocol Max
| Supported since | Contour 1.3.0 |
|---|---|
| USB ID (VID:PID) | 3302:43CC |
| Chip / protocol | WalkPlay |
| EQ | Write; every band and the preamp are read back from the DAC after each send, and any mismatch counts as a failed send. |
| Bands | 10 |
| Filter types | PEAK, LOW SHELF, HIGH SHELF |
| Gain | -10 to +10 dB |
| Q | 0.1 to 10 |
| Frequency | 20 Hz to 20 kHz |
| Preamp | -30 to 0 dB, whole dB |
| Where the EQ is kept | In the DAC's memory: one EQ, no slots. The tester saw the dongle save it to its memory; long-term keeping has not been checked yet. |
| Tested | By a Reddit community member on a real Protocol Max, October 2026: peak and shelf filters, no crashes. The developer has no Max to test on. |
What Contour does not do on the Protocol Max
- Firmware updates.
- LOW PASS and HIGH PASS filters. There is no Max unit to test them on.
- Large HIGH SHELF boosts at lower frequencies. They don't fit the Max's filter format, so Contour refuses them with a message instead of sending them.
- A/B comparison. It works on the Protocol Micro only for now.
- A DAC page.
Contour EQ and the Device PEQ tool on Hangout.Audio
The official way to set the Protocol Max's EQ is Device PEQ, a plugin of the Hangout.Audio graph tool: you connect the DAC, pick the Custom slot, then Pull or Push the EQ. Device PEQ works in a web browser, which Contour does not: Contour runs on the Android phone the dongle is plugged into. Both write the same single slot, Custom. Contour keeps your profiles in a library on the phone and needs no internet or account.
Using Contour with the Protocol Max
- Send a profile with HOLD TO SEND. Contour reads every band and the preamp back from the DAC, and shows ON DAC only if everything matches.
- A small pop when you send is normal: the dongle is saving the EQ to its memory.
- If a red line under HOLD TO SEND blocks a big treble boost with HIGH SHELF, lower the boost and send again.
Everything else works the same on every DAC: How to use Contour.
Questions about the Protocol Max
Is there an EQ app for the CrinEar Protocol Max on Android?
Yes. Contour EQ writes the Protocol Max's 10-band EQ and preamp from an Android phone and reads every send back. It is free and open source (Apache 2.0). The official tool for this DAC is Device PEQ on the Hangout.Audio graph tool, in a web browser.
Which PEQ filters can I use on the Protocol Max?
PEAK, LOW SHELF and HIGH SHELF, all native filters of the DAC, on 10 bands. LOW PASS and HIGH PASS are not offered: there is no Max unit to test them on.
Can Contour update the Protocol Max's firmware?
No. Contour does not update firmware. It writes the EQ and the preamp.
Protocol Max specs and prices on soundblooms.com