[sdiy] Roland TR mods

[Metrophage]

--- gregory zifcak <zifcak at hotmail.com> wrote:

> actually, there are quite a few straightforward mods you can do to
> the 707 and possibly the others too. the 707 uses analog egs and 
> vcas for the hh and cymbals, so you can add decay controls and 
> audio inputs (sequenceable gates). the panning is also all done in 
> the analog domain so you can change resistor values or replace 
> them with panpots. if you want to get really serious, you can add 
> new clock oscillators to the clock inputs of the samples, so you 
> can have independent pitch control over each sound. i used 555
> oscillators.

Once I started to get serious, I started running out of room on the
case! There is a lot of PCB stuffed in there, in relation to space
where controls and jacks can be mounted. I outfitted my 707 with
closely spaced toggle and rotary switches, I'd need to use d-dub
connectors for trigger I/O, audio inputs, CV inputs, etc. I really need
to get another unit (hopefully a 727) and bolt the top-case onto
another enclosure which offers more room. Then I can do pan pots, extra
sample ROMs, I/O, etc. Also, I need to think of some better sample
clocks, I made my 555s too hastily.

> in addition to groups.yahoo.com/group/tr-707 i have some example mp3s
> and details at userwww.sfsu.edu/~gzifcak/gear_mods.html

Neat, I didn't know you had your own web pages too. Great sounds!

CJ


		
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