[sdiy] More analog kickdrums

[gregory zifcak]

to my mind, the most important element is having separate decay envelopes 
for the pitch and amplitude. zappy kicks and 909s are both possible with 
this architecture, zappy ones just have a deeper pitch envelope. aside from 
this, some sort of impact tone is nice, although if you just mix the trigger 
signal in, the 707's rim trigger (i'm assuming that's what you would use?) 
is pretty rough sounding; more harmonics than just a pulse. the tama modules 
are a great start for kicks, it's pretty easy to get rid of the emphasis 
circuit and use its op amp to clone the existing eg. then you just have to 
disconnect the original eg from the vca and substitute the new one. now the 
old eg just controls pitch and the new one controls volume. this is what i 
use in combination with my 707. it would be tough to fit a tama circuit in 
the 707 case though.

>From: Johannes Öberg <johannes.oberg at gmail.com>
>Reply-To: Johannes Öberg <johannes.oberg at gmail.com>
>To: synth-diy at dropmix.xs4all.nl
>Subject: [sdiy] More analog kickdrums
>Date: Thu, 3 Mar 2005 12:54:12 +0100
>
>I'm thinking about modding my TR-707 to feature an analog bass drum,
>preferably of 909-ish flavour. However, I would also like to be able
>to do traditional "trance"/EBM kicks, which are usually much more
>synthetic and "laserzap" sounding, somewhat like
>http://www.looperman.com/00loops/loops_drums/Kick_loop_b_140bpm.zip
>
>(sorry, I found no better example online; I really mean a sound a bit
>more "laserzappy" than that)
>
>The 909 bass drum circuit seems a bit too complex for my purposes. The
>ADV Bass doesn't seem to have quite the sound I'm looking for. OTOH,
>the sound sample sounds as if it is drenched in reverb, perhaps it
>sounds better IRL? I found no dry samples online. Has anybody built it
>and know if it would fit my purposes?
>
>If not, do you guys have any other simple bass drum circuits to
>recommend? The PAIA one? Perhaps I should just breadboard a few of
>them, but I'm still putting together my surplus parts order :-)