Vintage Simmons Drums (UK) Users Group

So, I finally got some hardware together to run the test mentioned
below. Using the "dummy" EPROM, and that Wave Tool program, the output
looks like a decent sawtooth wave. I was able to copy the data and put
it into a spreadsheet to better analyze. I also made a .wav file of
the sound that I get using the "bright tom" EPROM. Is there some way I
can post my sound file to this board? If anyone is interested in
looking at my spreadsheet, I'd be happy to post that as well.

Also, I got hold of several more Simmons EPROMs, and they all sound
distorted, so, unless they're all messed up, it seems like something
is indeed amiss with my SDS1.

Thanks,
Jim Stewart

> 
> As the SDS1 counts through the EPROM, it counts up the data
> and you get a staircase sawtooth wave sound out.  Look at the
> SDS1 output on some sort of wave editor or audio oscilloscope
> software on your PC and look for a smooth regular sawtooth
> wave with 256 steps.  If you get big or uneven steps, you've
> got a faulty SDS1.  (My SDS1000 turned out to have a faulty
> DAC.)
> 
> 
> Steve
>