All I'm guessing is loop start time is when it starts, and loop length is.. how long the loop is.
For example: Loop: 0:25 - 3:06
loop start time would be 0:25 loop length would be 2:41 (because 3:06 - 0:25 = 2:41 obviously)
Here's the general format: NEZplug extend M3U playlist format(v0.9) for Winamp
filename::NSF,[1 based songno|$songno],[title],[time(h:m:s)],[loop(h:m:s)][-],[fade(h:m:s)],[loopcount] filename::KSS,[0 based songno|$songno],[title],[time(h:m:s)],[loop(h:m:s)][-],[fade(h:m:s)],[loopcount] filename::GBR,[0 based songno|$songno],[title],[time(h:m:s)],[loop(h:m:s)][-],[fade(h:m:s)],[loopcount] filename::GBS,[0 based songno|$songno],[title],[time(h:m:s)],[loop(h:m:s)][-],[fade(h:m:s)],[loopcount] filename::HES,[0 based songno|$songno],[title],[time(h:m:s)],[loop(h:m:s)][-],[fade(h:m:s)],[loopcount] filename::AY ,[0 based songno|$songno],[title],[time(h:m:s)],[loop(h:m:s)][-],[fade(h:m:s)],[loopcount] filename::NEZ,[0 based songno|$songno],[title],[time(h:m:s)],[loop(h:m:s)][-],[fade(h:m:s)],[loopcount]
filename song file relative path(*.zip;*.nsf;*.kss;...)
songno 0-based songno(::NSF playlist only has 1-based songno for historical reason.) $songno 0-based hexadecimal songno
title song title
time song play time h * 3600 + m * 60 + s (sec) Default time(5min) will be used, if time not specified.
loop(h:m:s) loop length h * 3600 + m * 60 + s (sec) loop(h:m:s-) loop start time h * 3600 + m * 60 + s (sec) loop(-) loop length is equal to play time. Song will not loop, if loop not specified,
fade fadeout length h * 3600 + m * 60 + s (sec) Default fadeout length(5sec) will be used, if time not specified.
loopcount loop count Default LoopCount will be used, if time not specified.
Now what I don't get is the whole [loop(h:m:s)][-] What is the dash for?
And this part: loop(h:m:s) loop length h * 3600 + m * 60 + s (sec) loop(h:m:s-) loop start time h * 3600 + m * 60 + s (sec)
It implies that somehow you type the length AND start time of the loop, but ... how? Using the above example, if it was to start at 0:25 and the loop lasted for 2:41, what would I type? 0:25 - 2:41, 2:41 0:25-..... ????