since I released the new spectrum/waterfall features, I’ve been asked how to get audio in the android device.
Most of the devices have a mic embedded in the earphones jack. Not all but many.
Personally I have a Nexus 7 2013 that has and a Motorola Moto G that (unfortunately) doesn’t.
When you have a device like the Nexus 7 2013, the solution is very simple and cheap.
Here’s a schematic I’ve found showing the pinout (it is the same for iPhones and iPads).
You can find various commercial solution costing around $4-$6 like this one:
Or build a cable yourself:
Before that, please check:
- your device had an audio in “hidden” in the earphones jack
- the pinout of your audio jack as in some devices the pinout can be different
If your device DOESN’T have a mic port embedded in the earphones jack, there another solution: using an external USB Sound card.
If you are already using the microUSB port to connect the device to the KX3 via OTG-USB Serial cables, you need a small USB hub so that you can attach more USB tools to your device.
Again, I personally use an Axus Xonar U3 USB sound card that is a very good one with very low noise and perfect for radio uses. Not a cheap solution but not expensive if compared to other quality USB sound card with the same features.
If you’re going to use the an external USB sound card make sure that it supports 48 Khz – 16 bit sampling rate as that is the settings I’m using for the actual versions of the KX3 Companion. In the future I’ll add options to change them manually if you need.
If you have more solutions let me know 😉
Enjoy the spectrum/waterfall with touch QSY!
72/73, Andrea IU4APC