the t.mix MicroMix 2 USB

For the price it is a good product, it has many features, including bluetooth reception. In an approx 40 euro product the features and usability are amazing. However I have to mention the issues it has, some are minor and some are more serious.

Of course in this price do not expect a good DAC, the signal from USB has a faint background noise, and with some songs and frequencies this background noise is more prominent. This is a minor thing since the input signals from the lines are much cleaner, and considering the price this is not a real issue.

However there is a serious issue which needs to be pointed out. When you switch it off, press the bluetooth button and especially when turning it ON, there is a very loud popping sound. This can destroy your speakers if you do not turn them off first or turn their volume completely down, Leaving the mixer volumes down will not help, the spike pop will still occur. To avoid it get in to the habit to turn off the speaker before switching on or off the mixer.

I wanted to use this to mix guitar rig and laptop audio output, listen with headphones and then route back to my laptop to record.

It kind of works, you can listen both guitar rig and background track, but i was unable to record both because when you select channel 2/usb to your headphones it doesn't send the channel 2 to main out. And when you select channel 2 to main out you can record both but can only hear channel 1 from your headphones. My hardware solution is to try to use y-cable on the headphones output so i can connect it to my laptop input and headphones at the same time.

And I also noticed that the usb output level is quite low.