AW: DX-7 Noise

[BJ]

Martin Czech wrote:
> 
> > Hmm, I didn't mean the TG77 does only produce noisy sounds.
> > I was speaking of the FM part (without running it thru filters
> > etc.) I once planned to buy one, but I didn't because I got
> > the impression that the FM part wasn't that different from
> > the TX-802, for example.
> >
> Well, a lot of modulation amount can lead to problems with
> aliasing, I think Fs  is 96 kHz, but "FM" sidebands don't
> care about that...
> 
> Another example of alias in a completely digital system.
> 
> If you stay away from this with proper level scaling, it should be no
> problem. The sound should be very clean, cool as ice...
> OTOH some effect sounds use heavy aliasing, or
> you can add some dirt via aliasing...

I agre with Martin here because the way to use the FM synthesis in a
DX/TG 
is to do some level scaling to actually reduce the modulators amplitude
in
to the carriers.This is a important issue to get clean sounds out of any
FM machine, applying this to the K2000 to makes cleaner and nicer
sounds. 
 
> I think the "FM" section differs from the 802, because it is possible to
> use the PCM section as modulator input...

And other nice things is: 12 separate outputs, loopable ENV's 
several gaussian noise generators,(noo need to use sampled noise)  
2 LFO's 45 algos,16 waveforms on each oscillator, carrier as modulator,
setting the phase on each osc's,etc. Programmable algos' and feedback
routings
its wery easy to do 6 sawtooth osc's just using the programable feedback
routing,
not available on any other FM from Yamaha other then the TG77/Sy99.  

> The PCM samples are crap, I wish one could download other
> samples, but this is only possible in the SY99,
> and these are getting dirt cheap on thes used gear market...

yes ,the PCM samples is crap particullary the percussion are just waste
of
RAM space, actually i was into the same ideas as Barry Klein (hello
Barry :))
some years ago, was into his Korg W-station to replace the internal PCM
samples
with some better ones, i did some design around this but i newer come to
shot so to say, the main reason was i needed a software that could
record
sample editing and saving the samples into a Mot S19 or Intel hex format
so it was possible to program the PROM in a eprom programmer.(This was
in 1991).

Infact there was someone or some company who had done this, i saw a
addvert
in some magazine for just this thing and they sold even the prom's
with different samples setts, but it was expencive as i can recall it. 

Hmm,It may bee the same company who made the card programmer to the 
roland D50 and the Korg M1, and if that's soo then its a german
company?? 

BJ