Seconded on LectroFan. I've been using one for years for sleeping all night. No looping at all. Inside it only has 16K of flash, not enough to store samples. I once recorded it for 8 hours and looked for any repeating dips in the waveform, but found nothing. I used the old analog Marsona units for decades before this, so it had some good competition. Customer service was great when I contacted them years ago with a rattling problem with one of mine.