I haven’t tested this with Renoise 2.0 yet, but I know in 2.1 I’ve been having trouble with some instruments carrying out after the next note plays or even when there are more than 4 note off commands in a row on the instrument in question. The thing is, it does it near the end of a song, and only if the rest of the song is played (if I play just that pattern it plays fine), or if I render the song to disk. On my latest song, I had to remove all the patterns except the last one and render that, then copy and paste it into the previously rendered song that was fully rendered with a sample editor so the ending was right.
I’m using SampleTank II instruments.
The machine I do music on is a Pentium 4 3.2ghz running windows XP Pro 32bit edition with a Delta 66 audio card.
there should be no problems with using different aliases on the same track: what you should not do is using the same alias on more than one track. the problem is that you cannot divide the audio signal of a single alias along different channels, so the least you can experience is that older notes get stopped when new ones are played on other tracks.