[comp.sys.amiga] DMCS

mb@munnari.UUCP (05/06/87)

re: DMCS and its shortcomings:

I tried to enter the Bolero by Ravel. Four systems, first=percussion,
second and third Flute/Clarinet/Trumpet/Strings in various combinations,
fourth=Elec.Bass for the bass cantus firmus.
On at least 20 occasions DMCS would refuse to play a note on the 2nd/3rd system
for its full duration. I had to delete notes from the 1st/4th system in these
cases until only two notes were played simultaneously.
After about 50 bars memory got so low and I so frustrated that I gave up.
(512k, no external drive, no WB but: 1> DeluxeMusic

When I entered Beethoven's "Albumblatt Fuer Elise" I discovered that the
instrument Piano is not able to play notes beyond b''' as needed in the
25th bar before the end.

Has anyone got instruments other than those on the DMCS disk?
Especially in the bass area, like tuba, cello, bassoon?

[Sorry, Alan. I had to.] 

wtm@neoucom.UUCP (Bill Mayhew) (05/09/87)

Hi,

While were on the subject of shortcomings of DMCS, I'm surprised
that more poeple haven't complained out some of the pretty awful
sounds that come from some of the instruments.  Perhaps, it's just
my computer-- about a year ago my computer's Agnus suffered a mild
stroke and cuased random crashes, disk errors and one sound channel
to go south.  It took me three trips to the dealer for replacement
Agni.  Finally, I got one that seemed to cure all the problems.

I'm presuming that the aliasing sounds in lower registers of the
instruments are caused by sampling a high note on an instrument,
and then progressively decimating samples for each lower note.  In
the case of the DMCS instruments, it seems like very little has
been done to smooth the decimated samples.  It seems like it would
be reasonable to write a program to clean up the samples.  If my
reading of the 8SVX IFF format is correct (mine is rather old and
marked `preliminary') there is no particular need for every note in
an instrument to have the same number of samples, or even a related
number.  Low frequecy notes should be decminated, the original
sampling rate restored by duplicating samples, and then some
interpolation done to remove the jaggieness.  Of course, the result
won't sound exactly like the original instrument, but then what we
get now doesn't sound very natural either!  Of course, even better
would be to sample every note, but then that's *work* (grin).
Doing that would help maintain some of the tonal character
difference between the low and high registers of the sampled
instrument.

Obviously, somebody out there has done some cut and paste work as is
evidenced by Drumkit on Instant Music and DMCS's Percussion.

It's also rather annoying that EA's manuals never mention technical
information.  It would be nice to know something about file
formats, etc.  They shouldn't assume that all interested user's have
sent their checks in to get the IFF dox from Westchester.  Probably
the majority of real world user's aren't aware of that support
function  (luckily for the support people's sanity).

--Bill (wtm@neoucom.UUCP)

val@wsccs.UUCP (Val Kartchner) (09/15/88)

     Does someone have the complete specifications for the DMCS IFF format?
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