We did experience a little latency when first using the Riff, but this is easily sorted by adjusting the buffer size located in the settings.
Although we have to mention that this did take three attempts to get right - the first two times, it set the gain way too high.
The software will then prompt you to go through the Auto Gain process, which, as the name suggests, will automatically adjust the gain level based on the output of your guitar's pickups - a very handy feature. Now, setting up the Riff with Bias FX 2 couldn't have been easier, once both are installed, Bias will find the interface automatically and set the Riff as your audio device. Using the Positive Grid Riff with Bias FX 2 You also get a free copy of BIAS FX 2 LE software. In the box, the Riff comes with two USB cables, a micro USB to USB-A, which is used for plugging the Riff into your computer and a micro USB to Lightning cable, so you can plug the interface directly into an iOS device. The interface has a reassuring weight and certainly feels well-made, while the bright screen is clear and easy to read. We got the all-black version - although red, green and blue variants are available - and we can’t help feel Steve Jobs would approve of its sleek, simple design. Our first thought while unboxing the Positive Grid Riff is just how good it looks.
(Image credit: Positive Grid ) Positive Grid Riff review: Performance & verdict