soundKey – FAQs

Which devices is Cyrus soundKey compatible with?

  • Android: OTG compatible devices, running OS 5.0 (Lollipop) and above
  • Apple: Devices running iOS 7.0 and above, using the Apple Lightning to USB Camera Adapter
  • Windows Phones: USB dual role devices, running Windows mobile 10 or later
  • Laptops: Works with any computers with USB connection

What headphones will the Cyrus soundKey drive?

  • Headphones with impedances between 16 & 64 Ohms.
  • Higher impedances will work, but will not be able to be louder

What is the output power of the soundKey?

  • 2 x 138mW into 16 Ohms at 1% THD+N.

Will the Cyrus soundKey work with Bluetooth wireless headphones?

  • No, the soundKey is designed to work with wired headhphones.

How much power does the soundKey use?

  • 50mA

What quality files can the soundKey play?

  • Can handle High-Resolution audio files up to 24bit/96kHz.

What’s the function of the orange LED?

The LED on the soundKey indicates a sample rate change (via a blink pattern) as follows:


  • Single blink from X sample rate to 44.1 kHz
  • Double blink from X sample rate to 48 kHz
  • Triple blink from X sample rate to 88.2 kHz
  • Quadruple blink from X sample rate to 96 kHz

In all cases X sample is any rate other than the new rate.


iOS Related:

Which cables do Apple users need?

  • Apple Lightning to USB Camera Adapter: Click here
  • If using the old 30 pin connector you need the previous version which is discontinued by Apple. 3rd Party versions are available described as ‘Apple 30 pin to female USB OTG cable’
  • The smaller cable will NOT work: Click here

Which iPods does Cyrus soundKey work with?

  • iPods running iOS 7.0 or later (5th gen iPod touch)
  • NOT older iPod classics

I can hear pops & clicks when listening to my soundKey connected to my iOS device

  • In rare cases using the soundKey with the standard Apple camera adapter exhibits a click or pop. We have found that by using the Apple Lightning to USB 3.0 Camera Adapter resolves this issue: Click here

Android Related:

My phone is playing audio through phone speakers and not my headphones?

  • The cable provided is a single direction cable. Check that the grey end goes into the phone.

My phone is still playing audio through the phone.

  • Your device may not be compatible for native USB OTG audio. Devices running custom operating systems built for android may not natively support USB-OTG audio.
  • There are apps that may allow non-native supported devices to work with the soundKey, such as USB Audio Player PRO.