The waveset opcode allocates a buffer for storing the input signal,
and the length of the buffer is by default p3/2 seconds (this can be
changed with the optional length parameter). With your example and
double precision floats, waveset allocates about 50 MB.

On Saturday 04 February 2006 14:06, Jean-Pierre Lemoine wrote:

> Environment Csound5 (release THANKS to all the developers!!!) - Java API 
> - Windows XP
> After receiving a message of low virtual memory ressource, I have 
> checked the memory usage of my Java program, and constated that it is 
> consuming more and more memory during its execution (1 Ko each second).  
> After hunting what  part of the program can be responsible, I found that 
> it is the perform() API.
> 
> The loop is in the run() method of a Thread
> 
>     public void run() {
>         try {
>             setRunning(true);
>             cs.Perform();
>             cs.delete();
>             setRunning(false);
>         }
>         catch( Exception ex ) {
>             ex.printStackTrace();
>         }
>     }
> 
> I have then checked with CsoundVST : same behaviour. Thus, I have tried 
> to isolate the opcode, and the winner is waveset
> Just comment the line "asig1w waveset asig1+ab1, 0.1" in the  following 
> CSD, to  have a perfect stability in memory usage.
> Normal?
> 
> <CsoundSynthesizer>
> <CsOptions>
> -d -g -odac0 -b256 -B4096 temp.orc temp.sco
> </CsOptions>
> <CsInstruments>
> sr = 44100.0
> kr = 44100.0
> ksmps = 1.0
> nchnls = 2
> 
> zakinit 2, 2
> 
> gkchrms20 chnexport "CHRMS20",2 ; RMS
> gkch20_1 chnexport "CH20_1",2 ; Evolution 1 Instrument 20
> gkch20_2 chnexport "CH20_2",2 ; Evolution 2 Instrument 20
> gkch20_3 chnexport "CH20_3",2 ; Evolution 3 Instrument 20
> gkch20_4 chnexport "CH20_4",2 ; Evolution 4 Instrument 20
> 
> instr 1 ; Loop Segment Evolutions
> gkch20_1 loopseg 0.05,0 , 0.0,0.0, 0.23,1.0, 0.5475,0.9209, 0.2225,0.0
> gkch20_2 loopseg 0.0314,0 , 0.0,0.0, 0.3711,0.2905, 0.1242,1.0, 0.5047,0.0
> gkch20_3 loopseg 0.0222,0 , 0.0,0.0, 0.4091,1.0, 0.5909,0.0096
> gkch20_4 loopseg 0.0295,0 , 0.0,0.0, 0.1652,0.06, 0.1298,1.0, 
> 0.118,0.0504, 0.177,0.0, 0.2006,0.4197, 0.2094,0.0
> endin
> 
> instr 20
> if1 = cpspch(5.0)
> if2 = cpspch(5.03)
> if3 = cpspch(5.05)
> 
> iharms1 =(sr*.4) / if1    ; Limits number of harmonics in bandlimited 
> pulse waveform
> ab1 gbuzz 1, if1, iharms1, 1, .9,2
> 
> iharms2 =(sr*.4) / if2    ; Limits number of harmonics in bandlimited 
> pulse waveform
> ab2 gbuzz 1, if2, iharms2, 1, .9,2
> 
> iharms3 =(sr*.4) / if3    ; Limits number of harmonics in bandlimited 
> pulse waveform
> ab3 gbuzz 1, if3, iharms3, 1, .9,2
> 
> kph1 randomi 300, 3800, .1
> asig1 phaser1 ab1 + ab2 + ab3, kph1, 64, .95
> kph randomh 200, 5600, ( gkch20_2 * 0.9 + 0.1 )
> asig2 phaser1 asig1, kph, 64, .95
> asig1w waveset asig1+ab1, 0.1  ; time to buy memory if the score 
> duration is very very very long
> 
> endin
> 
> </CsInstruments>
> 
> <CsScore>
> f1 0.0 65536 10 1
> f2 0.0 16384 11 1
> i1 0 300.0
> i20 0 300.0
> </CsScore>
> 
> </CsoundSynthesizer>