so, ich beantworte mal die frage des erstellers mit einem post, das ich einem anderen forum entnommen habe:
p.s. ich hoffe, du kannst englisch
Like to do something in return, (allthough you probably know this)
it's how L-vee (aka airwave/lolo etc) makes his kicks :
1) select a good sounding bass drum that has good power in the midtones. when selected, look at the waveform, take the highest point and put the beginning of your sample play there (it results in a 1khz clip you can't get with eq). when done, trim the kick, then remove the low freqs (let's say up to 500hz).
2) select another kick (808 style for example) with much low freqs, and remove the treble till 1khz.
3) put them in your arrange window and make a loop with them, both playing at the same time. Then put a delay on the lower kick, just 2 or 3 milliseconds.
4) merge them into one sample (kicks are always mono), if needed resample/rerecord the result.
5) First compress the new kick, with a 11ms attack, treshold -10/15db, and ratio 4 or 5:1, and NO release
6) eq it if needed (most of the time you won't have to)
7) you got a new bass drum, enjoy