You can sign up for Splice Sounds here:
We require payment information to start the trial, however, if you cancel within 14 days you won't be charged. You can cancel your trial here.
During the trial, you will be able to access our entire library and download some free samples (samples that cost 0 credits). These free samples are displayed in the middle of the page under the Get Started tab. If you want to start your paid subscription and download samples/presets that cost credits you can start your subscription at any time by clicking on "Upgrade" at the top right.