good god!! jose ,
this is a lifespans worth of material.. thanks
i remmeber c-sound for my atari ,, way back ,
i could be wrong but was the originator of c sound ,
marc (something)?
i'm going to start browsing
here is small part of babbel head bohgohisty wave maker
in basic
[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
' Names come from (square brackets indicate synthesis):
' http://www.huygens-fokker.org/docs/intervals.html
' Left Channel, Right Channel, Length, Concert Ratio Name
DATA 0 , 0 , 1, "Jerminal Rest"
DATA 270 ,160 , 6, "Pythagorean Major Sixth"
DATA 240 ,216 , 9, "Minor Second"
DATA 216 ,240 , 9, "Minor Second, tails in"
DATA 0 , 0 , 3, "Rest"
DATA 180 ,250 , 6, "Classic Augmented Fourth"
DATA 240 ,270 , 6, "Major Second"
DATA 160 ,160 , 9, "Unison"
DATA 180 ,180 , 9, "Unison"
DATA 0 , 0 , 6, "Rest"
DATA 135 ,270 ,12, "Octave"
DATA 160 ,160 ,12, "Unison"
DATA 216 ,216 ,12, "Unison"
DATA 0 , 0 ,30, "Terminal Rest"
' The remainder of this message is public domain.
OPTION BASE 1
DIM TwoPi AS DOUBLE
DIM pi AS DOUBLE
DIM temp AS DOUBLE
DIM BeatsPerSecond AS DOUBLE
DIM Angle(2) AS DOUBLE
DIM Velocity(2) AS DOUBLE
DIM Acceleration(2) AS DOUBLE
DIM Phase(2) AS DOUBLE
DIM note(2) AS INTEGER
DIM LastNote(2) AS INTEGER
DIM length AS INTEGER
DIM harmonics(2) AS DOUBLE
DIM samples AS LONG
DIM t AS LONG
DIM SampleRate AS LONG
DIM k AS INTEGER
DIM g AS INTEGER
DIM amp AS INTEGER
DIM basis AS INTEGER
DIM NumHarmonics AS INTEGER
DIM Sign(2) AS INTEGER
DIM glide AS INTEGER
DIM GlideTrim AS LONG
DIM test AS STRING
DIM TerminalAngle(2) AS DOUBLE
DIM DropAngle(2) AS DOUBLE
DIM PhaseDir(2) AS DOUBLE
DIM rationame AS STRING
PRINT
test = "0"
' I frequently flip that.
NumHarmonics = 2
BeatsPerSecond = 12#
pi = 3.141592653589793#
TwoPi = pi * 2
SampleRate = 44100
IF test = "0" THEN
OPEN "\sox\suumoh.raw" FOR OUTPUT AS #4
END IF
' This batch file will compile and view
' if nero waveedit and fbc are in your path.
OPEN "suumoh.bat" FOR OUTPUT AS #1
PRINT #1, "fbc -lang qb c:\basic\suumoh.bas"
PRINT #1, "suumoh.exe"
PRINT #1, "cd \sox"
PRINT #1, "sox -c 2 -r"; SampleRate; " -sw suumoh.raw suumoh.wav stat"
PRINT #1, "waveedit c:\sox\suumoh.wav"
CLOSE #1
' This maps 16 (tonic) to a 12-TET G.
harmonics(1) = (440 / 2 ^ (1 / 12) ^ 26) / 160
harmonics(2) = harmonics(1)
FOR k = 1 TO NumHarmonics
note(k) = 0
LastNote(k) = 0
NEXT k
OPEN "con" FOR APPEND AS #2
glide = 30
100
FOR g = 1 TO 14
READ note(1), note(2), length, rationame
PRINT #2, USING "DATA ###-,"; note(1);
PRINT #2, USING "###-,##"; note(2); length;
PRINT #2, ", "; rationame
' That is for feeding transpositions back into this code, although I
' am using a tuning that maps roughly to 12-TET, so I did not use it.
IF g > 0 THEN
' SOUND note(2) * harmonics(2), length * 4 / 3
END IF
IF test = "0" THEN
IF note(1) = 0 AND LastNote(1) = 0 THEN
samples = SampleRate * length / BeatsPerSecond
GOSUB 300
GOTO 75
END IF
IF note(1) = 0 AND LastNote(1) <> 0 THEN
GOSUB 250
FOR k = 1 TO NumHarmonics
LastNote(k) = note(k)
NEXT k
samples = SampleRate * length / BeatsPerSecond
GOSUB 300
GOTO 75
END IF
IF LastNote(1) = 0 AND note(1) <> 0 THEN
FOR k = 1 TO NumHarmonics
LastNote(k) = note(k)
NEXT k
samples = SampleRate * length / BeatsPerSecond
GOSUB 275
GOTO 75
END IF
IF note(1) <> 0 AND LastNote(1) <> 0 THEN
samples = SampleRate * length / BeatsPerSecond
samples = samples / glide
GlideTrim = samples
GOSUB 300
samples = SampleRate * length / BeatsPerSecond
samples = samples - GlideTrim
FOR k = 1 TO NumHarmonics
LastNote(k) = note(k)
NEXT k
GOSUB 300
GOTO 75
END IF
END IF
75 NEXT g
CLOSE #4
END
' *Neat* Silencer -- finishes a wave like 275 starts one.
' When it reaches a peak or a trough, then it cuts amplitude in half
' and biases it by half.
250
FOR k = 1 TO NumHarmonics
temp = Angle(k) / TwoPi
Angle(k) = (temp - FIX(temp)) * TwoPi
IF Angle(k) > pi * 3 / 2 THEN
TerminalAngle(k) = pi * 3.5
PhaseDir(k) = 1
DropAngle(k) = pi * 2.5
ELSEIF Angle(k) > pi / 2 THEN
TerminalAngle(k) = pi * 2.5
PhaseDir(k) = 0
DropAngle(k) = pi * 3 / 2
ELSE
TerminalAngle(k) = pi * 3 / 2
PhaseDir(k) = -1
DropAngle(k) = pi / 2
END IF
NEXT k
260
FOR k = 1 TO NumHarmonics
Phase(k) = SIN(Angle(k))
SELECT CASE PhaseDir(k)
CASE 1
IF Angle(k) >= DropAngle(k) THEN
Phase(k) = Phase(k) / 2 + .5
END IF
CASE 0
IF Angle(k) >= DropAngle(k) THEN
Phase(k) = Phase(k) / 2 - .5
END IF
CASE -1
IF Angle(k) >= DropAngle(k) THEN
Phase(k) = Phase(k) / 2 + .5
END IF
END SELECT
IF Angle(k) < TerminalAngle(k) THEN
Angle(k) = Angle(k) + Velocity(k)
ELSE
Angle(k) = TerminalAngle(k)
END IF
NEXT k
GOSUB 400
FOR k = 1 TO NumHarmonics
IF Angle(k) < TerminalAngle(k) THEN GOTO 260
NEXT k
FOR k = 1 TO NumHarmonics
Angle(k) = Angle(k) - Angle(k)
NEXT k
RETURN
275
' This starts a wave from zero, using half the amplitude, a start
' from where sin(angle) = -1, and a bias of half. This cuts
' a leading click that I can hear on some equipment with some tunes.
FOR k = 1 TO NumHarmonics
Velocity(k) = TwoPi * LastNote(k) * harmonics(k) / SampleRate
Acceleration(k) = TwoPi * note(k) * harmonics(k) / SampleRate
Acceleration(k) = (Acceleration(k) - Velocity(k)) / samples
PhaseDir(k) = 1
Angle(k) = 3 / 2 * pi
NEXT k
280
FOR k = 1 TO NumHarmonics
IF PhaseDir(k) = 1 THEN
Phase(k) = SIN(Angle(k)) / 2 + .5
ELSE
Phase(k) = SIN(Angle(k))
END IF
Angle(k) = Angle(k) + Velocity(k)
Velocity(k) = Velocity(k) + Acceleration(k)
NEXT k
samples = samples - 1
GOSUB 400
FOR k = 1 TO NumHarmonics
IF PhaseDir(k) = 1 THEN
Phase(k) = (Phase(k) - .5) * 2
END IF
IF Phase(k) > SIN(Angle(k)) THEN
PhaseDir(k) = -1
END IF
NEXT k
FOR k = 1 TO NumHarmonics
IF PhaseDir(k) = 1 GOTO 280
NEXT k
300
' Calculate constants of change for write loop.
FOR k = 1 TO NumHarmonics
Velocity(k) = TwoPi * LastNote(k) * harmonics(k) / SampleRate
Acceleration(k) = TwoPi * note(k) * harmonics(k) / SampleRate
Acceleration(k) = (Acceleration(k) - Velocity(k)) / samples
NEXT k
' Main write loop. Static Phases problem solved at 250.
FOR t = 1 TO samples
FOR k = 1 TO NumHarmonics
Phase(k) = SIN(Angle(k))
NEXT k
GOSUB 400
FOR k = 1 TO NumHarmonics
Angle(k) = Angle(k) + Velocity(k)
Velocity(k) = Velocity(k) + Acceleration(k)
NEXT k
NEXT t
RETURN
400
' Write a sample.
amp = CINT(Phase(1) * 32000)
PRINT #4, CHR$(amp AND 255);
PRINT #4, CHR$((amp AND 65280) / 256);
amp = CINT(Phase(2) * 32000)
PRINT #4, CHR$(amp AND 255);
PRINT #4, CHR$((amp AND 65280) / 256);
RETURN
]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]
charles
----- Original Message -----
From: "José Ángel Morente" <msxjam@...>
To: <CZsynth@yahoogroups.com>
Sent: Wednesday, January 25, 2012 9:55 AM
Subject: Re: [CZsynth] Re: Casio XW-P1 virtual analog
> On Wed, Jan 25, 2012 at 5:12 PM, charlie 'chop' copp <
> charles.copp@...> wrote:
>
> > **
> >
> >
> > thanks for codejose
> >
> > there are some doubts..
> >
> > like why does the for/next loop conrol variable 'i' also get deducted
from
> > the samplesize?
> >
>
> Variable 'i' simulates the time base...
>
> samplesize is never defined
> > samplebuffer is not dimensioned
> >
>
> Yeah I know. It's only a draft to show the idea. It is not real code and
> shows only the main concept.
>
>
> > any method to employ to make a saw ,pulse,square ,triangle
> >
> It is quite easy. To get a square wave just make a function like this:
>
> function squareWave (i,freq)
> if sin(i*freq) > 0 then squareWave = 1
> else
> if sin(i*freq) = 0 then squareWave = 0
> else
> if sin(i*freq) <0 then squareWave = 1
> end function
>
> for a sawtooth wave you may use the MOD operator (the modulo or remainer
ofShow quoted textHide quoted text
> a division of "i" by frequency, etc.
>
> > where do i find this code on c-sound ?
> > thanks in advance
> > charles
> >
> There exist lots of C-Sound resources on the net, thousands of examples,
> instruments, scores, etc.
> With C-Sound it is an easier task because it has built-in functions for
> oscillators, filters, FM, etc.
>
> Take a look at http://www.adp-gmbh.ch/csound/fm/index.html for some nice
> examples of FM instruments generated with CSound.
>
> Here is a good tutorial to get into Csound:
>
> http://www.csounds.com/tootsother/index.html
>
>
> Cheers.
>
> JaM
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>