Here are all important links:
http://lmms.io/forum/viewtopic.php?f=1&t=4740
-A few rules and useful forum instructions
If you like to introduce yourself, to the community, go here:
http://lmms.io/forum/viewtopic.php?f=4&t=4480
Are you on 1.2.2? An earlier version had an import-issue.
1.2.2 can import single files ~50 mins, but you ofcause has to have the necessary RAM for that!
If you do not have 1.2.2, upgrade:
https://lmms.io/wiki/index.php?title=In ... w_versions
If you do have 1.2.2, please post your:
* Name of your Operative System (Windows/ Linux/ Mac) And subtype (Home' 'Mint' '10.13' aso)
* hardware specification (ram & soundcard is the most important)