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Multisampling
 

offline urb from Trondheim (Norway) on 2002-04-30 10:34 [#00200601]
Points: 568 Status: Regular



Ok.. here's a question for those of you who's doing some
sampling.

If you were to sample, like say a grand piano, are there any
preferred methods of doing this? Should the spacing of the
multisamples be the same over the whole register or are
there any other tips/rules for this?

And how many samples would you need? I've read that you
should have atleast seven samples per octave for instruments
like pianos, but are there other opinions on this?

Any pointers to multisampling tutorials/resources would be
appreciated :)

The reason I'm asking is that I'm writing a semester thesis
in music technology on sampling and they want calculations
on the number of samples to be used in multisampling. From
what I've read, people generally choose this quite randomly,
not by caculating.


 

offline map from mülligen (Switzerland) on 2002-04-30 10:37 [#00200606]
Points: 3408 Status: Lurker



that would be a great tutorial to write, so i prefer 2
samples for each octave, there are no rules, sure you'll
need some filters, envelope and so on...

just make a programm and add all your keygroups, test
around, calculate the pitch with the frequencies, it's hard
to begin, so rush over the whole keyboard and listen exactly
to each key for wrong sounding to the next key... it's a bit
feelish work ...


 

offline map from mülligen (Switzerland) on 2002-04-30 10:40 [#00200610]
Points: 3408 Status: Lurker



also crossfades, LFO, cutting the samples exactly,
timestretching...

i think you know what i mean.

i begin by a normal C3 sample, tuning it by layering it with
an original C3 sample, mostly i got three pitches up and
down for each sample...


 

offline urb from Trondheim (Norway) on 2002-04-30 10:42 [#00200612]
Points: 568 Status: Regular



thanks for the tips.. hadn't thought much about layering
yet. I'll look into that.


 

offline map from mülligen (Switzerland) on 2002-04-30 10:46 [#00200616]
Points: 3408 Status: Lurker



just work with a identically sampling rate, never use 22 khz
and 44khz samples on the same keymap..
Try multisampling at F2, C3, G3, D4, A4, E5, B5, and F#6


 

offline aneurySm from Ypsilanti (United States) on 2002-04-30 17:23 [#00201107]
Points: 1699 Status: Lurker



i normally sample three tones per octave
but it also depends on the tone color of the instrument
how complex the sound is
the more complex the more samples
where as if yer just use a chip sound [i.e. a basic waveform
such as pulse or square] you only need one sample for the
entire dynamic range of yer programming capabilites


 

offline Laserbeak from Netherlands, The on 2002-04-30 17:34 [#00201114]
Points: 2670 Status: Lurker



To sample a piano properly, you need to sample every note,
if you don't the formants will be wrong(unless you have a
special resynthesis/formantcorrecting sampler)...


 

offline urb from Trondheim (Norway) on 2002-04-30 20:52 [#00201466]
Points: 568 Status: Regular | Followup to map: #00200616



any reason you mention these specific notes? (F2, C3, G3,
D4, A4, E5, B5, and F#6)


 

offline urb from Trondheim (Norway) on 2002-04-30 20:54 [#00201469]
Points: 568 Status: Regular



an interval of six semitones.. I'm too tired for this :)


 

offline Ceri JC from Jefferson City (United States) on 2002-04-30 20:56 [#00201471]
Points: 23533 Status: Moderator | Followup to urb: #00200601 | Show recordbag



Sample just middle C. Then you get built in distortion the
higher/lower you go ;)


 

offline urb from Trondheim (Norway) on 2002-04-30 20:58 [#00201475]
Points: 568 Status: Regular



ah.. built-in distortion, and only one sample.. that's
resource effective at least :)


 

offline map from mülligen (Switzerland) on 2002-04-30 21:01 [#00201480]
Points: 3408 Status: Lurker



there are several solutions, so, just test around, i think
timestretching, looping and release looping are important
for good pianos, also the attack phase ...

just think at the theory: if you play a sample one octave
up, it rings out only the half time from the original, same
when you pitch it a octave down...

octave up/down original length *2/ /2


 

offline Ceri JC from Jefferson City (United States) on 2002-04-30 21:01 [#00201481]
Points: 23533 Status: Moderator | Followup to urb: #00201475 | Show recordbag



You can also try running your music package on a 486 for
more built in distortion :)

I've always wondered how the instrument files in programs
distort so little even though they're only one note whereas
.wavs distort after a couple of octaves...


 

offline map from mülligen (Switzerland) on 2002-04-30 21:16 [#00201496]
Points: 3408 Status: Lurker



CeriJC i'll test that, i like such crazy ideas, like
reversing the sample, adding horrible effects, but not loud
and then reversing it again :)


 


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