[sdiy] learning from early drum machines?

[Dan Snazelle]

INGO SAID:

How about using a matrix of jacks? Each column represents a beat and
> each row represents an instrument. Connect the outputs of the 4017 to
> the columns and the trigger inputs of the sound circuits to the rows.
> Use jacks with diodes built in.

ok great



0-i need to get my head around the diode matrix thing a bit better.



i could do all of that with just ONE 4017? or one for each row? if its
for each row, i think i get it. just use a master clock and have say
six slave 4017's. 



but if not...please explain











lots of good ideas are going around!





i found this:





http://electro-music.com/forum/viewtopic.php?t=20798





very cool. i need to understand it a bit better but it looks like a winner of an idea





also





dave sent me this:





http://www.modular.fonik.de/files/EFMforum/DBopII/page_002.html#top





the DBOP which looks very useful but sadly, the website scheamticsa wont open up to bigger images.





at full zoom in they are very blurry. but i CAN get a lot from them





FONIK--do you have the original images that went with the site? maybe they are bigger?








i need to get my head around the diode matrix thing a bit better too









--------------------------------------------
check out various dan music at:

http://www.myspace.com/lossnyc


http://www.soundclick.com/lossnyc.htm


http://www.indie911.com/dan-snazelle
(or for techno) http://www.myspace.com/snazelle






----------------------------------------
> From: igg.debus at t-online.de
> Subject: Re: [sdiy] learning from early drum machines?
> Date: Sun, 11 Jan 2009 14:54:39 +0100
> To: synth-diy at dropmix.xs4all.nl
>
>
> Am 11.01.2009 um 12:10 schrieb Dan Snazelle:
>
>>> From: dayoldbread at ghettosynth.com
>>> To: subjectivity at hotmail.com
>>> Subject: Re: [sdiy] learning from early drum machines?
>>> CC: synth-diy at dropmix.xs4all.nl
>>>
>>> Hi Dan,
>>>
>>> It's really quite easy to make beats without microprocessors. The
>>> earliest electronic drum machines used diode matrices as read only
>>> memory. You can replicate this approach or use a more modern
>>> variant like an eprom.
>>>
>>>
>>> In essence, a counter cycles through memory and every place you
>>> want a beat you store a one which becomes a gate output.
>>>
>>> Think of a simple sequencer using a 4017 with reset after the 8th
>>> output. Each ouput then represents an eight note. Now think of the
>>> kick drum playing a 4/4 beat and you want an output on each
>>> quarter note. So you connect every other output to the anode of a
>>> small signal diode and tie all the cathodes toegether. You've just
>>> created a four input or gate. Now use the common cathode to
>>> trigger the gate input of your kick drum sound.
>>>
>>>
>>> Repeat for each sound. What you end up 



--------------------------------------------
check out various dan music at:

http://www.myspace.com/lossnyc


http://www.soundclick.com/lossnyc.htm


http://www.indie911.com/dan-snazelle
(or for techno) http://www.myspace.com/snazelle






----------------------------------------
> From: igg.debus at t-online.de
> Subject: Re: [sdiy] learning from early drum machines?
> Date: Sun, 11 Jan 2009 14:54:39 +0100
> To: synth-diy at dropmix.xs4all.nl
>
>
> Am 11.01.2009 um 12:10 schrieb Dan Snazelle:
>
>>> From: dayoldbread at ghettosynth.com
>>> To: subjectivity at hotmail.com
>>> Subject: Re: [sdiy] learning from early drum machines?
>>> CC: synth-diy at dropmix.xs4all.nl
>>>
>>> Hi Dan,
>>>
>>> It's really quite easy to make beats without microprocessors. The
>>> earliest electronic drum machines used diode matrices as read only
>>> memory. You can replicate this approach or use a more modern
>>> variant like an eprom.
>>>
>>>
>>> In essence, a counter cycles through memory and every place you
>>> want a beat you store a one which becomes a gate output.
>>>
>>> Think of a simple sequencer using a 4017 with reset after the 8th
>>> output. Each ouput then represents an eight note. Now think of the
>>> kick drum playing a 4/4 beat and you want an output on each
>>> quarter note. So you connect every other output to the anode of a
>>> small signal diode and tie all the cathodes toegether. You've just
>>> created a four input or gate. Now use the common cathode to
>>> trigger the gate input of your kick drum sound.
>>>
>>>
>>> Repeat for each sound. What you end up with is a matrix of diodes
>>> where the anodes are connected to some gates and the cathods are
>>> tied together for each sound.
>
> How about using a matrix of jacks? Each column represents a beat and
> each row represents an instrument. Connect the outputs of the 4017 to
> the columns and the trigger inputs of the sound circuits to the rows.
> Use jacks with diodes built in.
>
> I'd provide at least 16 steps. Many rhythms have beats on the double-
> off-beat. I'd also provide a variable reset, at least at the 12th
> step, so rhythms with triplets can also be done.
>
> Ingo
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy