I acquired a Roland TR-09 earlier this year and was disappointed when I realized that I couldn't rely on recording from the unit, due to a whiny/buzzing sound coming from the main output. A USB Isolator is what was needed. The problem now was the TR-09 needing min. of 400mA to power up. All USB isolators on the market were only capable of providing 2-300mA of power, which wasn't enough. I then came across Hifime and their USB High Speed Isolator. Nick was very good and patient in replying to all my emails with questions on the unit and kept me up to date on the status of its release, since I had pre-ordered one.
The unit arrived yesterday and IT WORKS! The whining buzz of the outputs of my TR-09 are gone and it hasn't affected operation of the unit either. It powers up and responds to midi CC messages over the USB, as if the isolator wasn't even there.
If you have a bus powered audio device that is causing you grief due to ground loops, then this is the device for you.
I bought the full speed isolator which works perfectly when just playing back music but is too slow for multi track recording. I decided to buy this high speed isolator with a much higher transfer rate but it did not work at all with M Audio Fast Track Pro on a widows 10 computer. Windows flagged up a warning message:USB device not recognised. The last USB device connected to this computer malfunctioned and windows does not recognise it.
They asked me to send the unit back and they would send me a new unit - that was six weeks ago and they have stopped replying to my emails. So they have £70 of my money and I have nothing.
HIFIME REPLY: We are VERY sorry that you didn't get any reply in time. We have refunded your payment in full now. (duplicate reviews merged).
Noise through my sensitive headphones is gone. Before I could hear mouse and network, now it's dead silent. Not to mention an increase in overall detail. A definitely must have!
Finally the buzzing has stopped! Before I would get an increasingly noisy buzz that correlated with the load on my system that slowly drove me insane. Now my audio is crystal clear again, thanks!
Bought two of these, both produce noise through the speakers :(