If you are experiencing the 'red disk' indicator in Kontakt and the sound is distorting, one likely possibility is that the library is not retrieving data fast enough from your hard drives.
There are a few possibilities for why this may be:
1. The speed of the drive is too slow.
2. The connection type of the drive may not have sufficient bandwidth.
3. The format of the drive may be ExFat or FAT32, which do not stream data efficiently.
If you are using a non-solid state drive, it could be possible that you're actually being 'bottlenecked' at the speed in which the drive spins at. This is common with HDD's run at anything lower than 7200rpm.
To relieve some of the pressure on the drive, we can load more content into RAM:
In your Kontakt preferences, go to Memory > Instrument Preload Buffer Size, and increase this value. These results will vary depending on your system, so it is often a good idea to test out different values and find what works for you.
If this doesn't help as expected, you can also consider increasing the latency, as described here.
Perhaps the best option here would be to invest in a SSD (Solid State Drive). These are highly recommended as the drive speed is significantly higher than anything else available on the market.
A common issue for Mac users: If your drive is USB3 compatible, but your Mac is quite old, the ports it is plugged into may be USB2, and have a smaller bandwidth.
A solution to this issue is to look at upgrading your connection types. One potential example is the "OWC Thunderbolt dock".
For Windows users, make sure that you're using any USB3 ports that are available. These can usually be distinguished by the 'blue' plastic inside the port.
Most hard drives come pre formatted as ExFAT or FAT32. As a result, your drive will not stream data efficiently. We have an article available here that will give you more information on this.