Linseg opcode minus sign

Newbies
#1

Hello,
I decided to deepen the study of Csound with CsoundQt.
I just spent three days on the linseg opcode to feed the diskin opcode to read the fox.wav sample.
I have succeeded 90% in mastering the linseg opcode but I can not control the reading time in reverse of the fox.wav sample with the minus sign.Attached is the diskin_io3.csd file I created. If anyone knows the trick, I’m all for it.

Thank you

<CsoundSynthesizer>
<CsOptions>
; Select audio/midi flags here according to platform
;-odac     ;;;RT audio out
;-iadc    ;;;uncomment -iadc if RT audio input is needed too
; For Non-realtime ouput leave only the line below:

 -o io_io3.wav -W ;;; for file output any platform

</CsOptions>
<CsInstruments>

sr     = 44100
ksmps  = 32
nchnls = 1
0dbfs  = 1

instr 1

ktrans linseg   1,   2.757,   1,   0,   1/2,   (2.757*2),   1/2,   0,   2,   (2.757/2),   2,   0,   1,   2.757,   1

a1     diskin "fox.wav", ktrans, 0, 1, 0, 32

       outs a1, a1

endin

</CsInstruments>
<CsScore>

i   1   0   12.4065
e

</CsScore>

</CsoundSynthesizer>
#2 
ktrans linseg   -1, 2.757, -1, 0, -.5, 2.757*2, -(1/2), 0, -2, 2.757/2, -2, 0, 1, 2.757, 1

The last segment will of course play forwards.

Another way you could do this is to use your existing linseg & instead put:

ktrans * -1

for the pitch parameter of diskin.

HTH,
Scott

#3

Hello and thank you very much Scott,
thanks to your help, it clicked. In fact, I was trying to read only the last sample backwards.
ktrans linseg 1, 2.757, 1, 0, 1/2, (2.757*2), 1/2, 0, 2, (2.757/2), 2, 0, -1, 2.757, -1
I’m not good at it,
but I’m stubborn. So to play the last sample upside down, you have to frame it with 2 negative ix values.
Subject resolved.
Thanks again Scott.