A good site of “sounds of space” collected by U Iowa instruments on various spacecraft.
Here you can find many sounds “recorded” (remember that this are radio frequencies not audio frequencies) by Cassini, Voyagers and Galileo spacecrafts during the Jupiter and Saturn missions.
The site is Space Audio.
Here you can listen to the famous Cassini’s sound recorded near Saturn claimed to resemble to an alien voice if transposed one octave up preserving the duration: