Hi everyone,
I am going to try to explain the problem I have in detail but please keep in mind that I am very new to this stuff and music making in general so I might get some stuff wrong. Thank you for understanding.
So here's my setup: I am using LMMS on Linux Mint and I am also using the Vital synth that I run through Carla Patchbay. There's a portion of my song where I want my audio filter in Vital to change over the span of about 18 seconds, while the notes are still playing. To achieve this, I am using an LFO in Vital connected to Filter 1 that's set to Sync mode and has a frequency of about 18 seconds, as mentioned before. I am using the Sync mode because it's the only LFO mode in Vital that I know of that doesn't reset the LFO when I press the notes, because I want the filter to transition slowly over about 18 seconds (although if someone knows of a better way to do this, I would appreciate it if you told me about it).
Anyway, this works flawlessly in the song editor, when I play the song from the beginning, the filter starts out at the beginning and transitions to where I want it to in about 18 seconds, and it works fine every time. The problem arises however, when I actually export the song and listen to the audio file. The LFO "transition" starts at a random time and not at the beginning as expected and thus it ends either too late or too early. Because of this, the entire portion sounds different than when I listen to the song in the song editor.
I really hope my explanation makes sense. I have no idea if this is a problem with LMMS or Vital or Carla or whatever, but I would really appreciate some help. If there is a way to fix this, I'd really love to know because otherwise I would probably have to record the song with something like Audacity or something.