Hello,
I'm new in using the SP 404, but still I think it's weird what's happening.
The sample that I put on the SD-card are wave-files, with sample rate 44.1 kHz.
I didn't admit any effects on the sample. I used the original SD-card from Roland. Tried several times with several files... Every file has changed sound..

What seems to be the problem?
I have no idea, I think already tried everything..

Bas

I would say don't mess too much with the quality of the samples before you throw them on the SD card. If there's still an issue, then I'd suggest trying to record the samples manually through the SP (literally play directly from whatever program you're using-- I use Audacity, but I've never just throw samples on my card-- it's all about relying on your ears to catch the sample. I hope that helped. I highly doubt it though lol. By the way, you wrote this in the wrong section. Throw it in the "tips and tricks" section.