Hi,

Following the FoF discussion, I wanted to clarify my understanding
of instrument duration and release under MIDI, so I made this test
file:

<CsoundSynthesizer>
<CsOptions>
-m0 -d -L stdin -odac
</CsOptions>

<CsInstruments>
sr     = 48000
ksmps  = 48
0dbfs = 1.0
nchnls = 2

instr 1
    prints "instr start\n"
    itim times
    midinoteonkey, p4, p5    ; dummy to activate MIDI
    kadsr madsr 0.1, 0.2, 1.0, 0.5
    krel release
    if krel > 0 then
        ktim times
        printf "release at %f\n", krel, ktim - itim
        printks "ramp %f at %f\n", 0.1, kadsr, ktim - itim
    endif
endin

</CsInstruments>

<CsScore>
</CsScore>

</CsoundSynthesizer>
 

The idea was to show me the time course of the extended
release time (with the half-second adsr). When I run it (under
Csound 6.12 or 6.13) I actually get this:

instr start
release at 0.519000
ramp 1.000000 at 0.519000
ramp 0.998000 at 0.520000
ramp 0.996000 at 0.521000
ramp 0.994000 at 0.522000
ramp 0.992000 at 0.523000
ramp 0.990000 at 0.524000
ramp 0.836000 at 0.601000
ramp 0.636000 at 0.701000
ramp 0.436000 at 0.801000
ramp 0.236000 at 0.901000
ramp 0.036000 at 1.001000
instr start
release at 1.046000
ramp 1.000000 at 1.046000
ramp 0.998000 at 1.047000
ramp 0.996000 at 1.048000
ramp 0.994000 at 1.049000
ramp 0.992000 at 1.050000
ramp 0.990000 at 1.051000
ramp 0.988000 at 1.052000
ramp 0.986000 at 1.053000
ramp 0.984000 at 1.054000
ramp 0.982000 at 1.055000
ramp 0.980000 at 1.056000
ramp 0.890000 at 1.101000
ramp 0.690000 at 1.201000
ramp 0.490000 at 1.301000
ramp 0.290000 at 1.401000
ramp 0.090000 at 1.501000

with some unexpected initial printouts -- at 1 per k-cycle --
before it prints the expected release ramp every 1/10 sec.
(If I change ksmps, the number of lines changes appropriately.)

I went back to Csound 5, and there I just see the expected
printouts for the release phase only.

I guess this is a bug?

	-- Pete --
 

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