I made the models to match the lms file and saved. Went to Sequencer tab and opened new, selected musical sequence, selected 50ms timing. Opened the mp3 file in Audacity and made a timing file (label 50ms) and saved the file. Back to xlights imported timing file and added models. Went to Convert tab selected lms file with output as fseq. Checked all channels off at end, map empty lms channels, and map lms channels with no network. Selected Start Convert, when file was done went to Sequencer tab, verified data was there. Saved the file and specified file name, and data disappears. I am probably doing the hard way and missing something. I'm not sure what you mean by data layer, so that is probable one of the problems.