Re: [AH] DX7 Vs...

From Brian Willoughby
Sent Sun, Sep 30th 2018, 18:42

One thing I noticed is that each group of algorithms has a different =
amplitude, depending upon the total number of final oscillators.

For example, that DX7 =E2=80=9Cstraight line=E2=80=9D algorithm has each =
of the 6 operators at almost 16 dB down. A 4 operator DX would only be =
12 dB down, at most. Of course, for the algorithms that have the same =
number of final oscillators on both 6-op and 4-op variants, the =
amplitude reduction is identical. This is just a technique to avoid =
digital clipping when the final oscillators are mixed.

Of course, there are a lot more differences - between algorithms or =
models - than just the amplitude of individual output oscillators.

As for bandwidth, is there a chart of the sample rate for each DX model? =
I expect that we have no information on the processing power available =
inside. It seems doubtful that the processing was actually changed =
significantly between 6-op and 4-op, other than perhaps run at a =
slightly higher sample rate. Keep in mind that the main motivation for =
4-op was to keep costs down, not to allocate more bandwidth to each =
operator. It seems unlikely that the design would have done anything to =
increase the cost - at least not without making the same improvements to =
the 6-op variants.

Brian


On Sep 28, 2018, at 1:04 PM, Kenny Balys <xxxxx@xxxxxxxx.xxx> wrote:
> The 4-op DX9 has a little more crunch than the 6-op DX7.
>=20
> Each operator gets more of the bandwidth.