[Csnd] Sending a different random number with successive triggers
| Date | 2020-03-09 21:34 |
| From | Ryan Jeffares |
| Subject | [Csnd] Sending a different random number with successive triggers |
Hey all,
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For a current project I am taking inputs from sensors on an Arduino in to Csound over serial. One of the means of interaction is pressing a tactile button connected to the Arduino which schedules an event for another instrument. The even is scheduled with at least one random k-rate variable, which is rounded to an integer. What I need to know is, is it possible to ensure that a different integer is sent each time? There's a lot of repetition currently because the range of random numbers isn't very big. Here's some very basic example code of what I mean: <CsoundSynthesizer> <CsOptions> -n -d </CsOptions> <CsInstruments> ; Initialize the global variables. ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 iPort serialBegin "/dev/cu.usbmodem14301", 9600 ;connect to the arduino with baudrate = 9600 serialWrite iPort, 1 ;Triggering the Arduino (k-rate) kbutton serialRead iPort ktrig trigger kbutton, 0, 0 if (ktrig = 1) then knote random 60, 63 knote = int(knote) event "i", "plucky", 0, 0.5, knote endif endin instr plucky kfreq = p4 kfreq = cpsmidinn(kfreq) asig pluck 1, kfreq, i(kfreq), 0, 1 outs asig, asig endin </CsInstruments> <CsScore> i1 0 z </CsScore> Thanks! |
| Date | 2020-03-09 22:02 |
| From | "Jeanette C." |
| Subject | Re: [Csnd] Sending a different random number with successive triggers |
Mar 9 2020, Ryan Jeffares has written:
...
> What I need to know is, is it possible to
> ensure that a different integer is sent each time? There's a lot of
> repetition currently because the range of random numbers isn't very big.
...
> if (ktrig = 1) then
> knote random 60, 63
> knote = int(knote)
> event "i", "plucky", 0, 0.5, knote
> endif
...
If you can spare the cycles: I'd create two varialbes, one koldnote and
knote. In a loop generate random numbers until knote != koldnote. Set
koldnote to the current knote then and continue with your event. Would
that do?
Best wishes,
Jeanette
--
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| Date | 2020-03-09 23:08 |
| From | Pete Goodeve |
| Subject | Re: [Csnd] Sending a different random number with successive triggers |
| Attachments | None |
| Date | 2020-03-09 23:32 |
| From | Pete Goodeve |
| Subject | Re: [Csnd] Sending a different random number with successive triggers |
| Attachments | None |
| Date | 2020-03-10 13:24 |
| From | Ryan Jeffares |
| Subject | Re: [Csnd] Sending a different random number with successive triggers |
Thanks a million for the input guys. I have it working now using the following: koldnote init 0 if(ktrig==1) then knote random 60, 63 knote = int(knote) if(knote != koldnote) then event "i", "plucky", 0, 1, knote else knote += 1 event "i", "plucky", 0, 1, knote endif koldnote = knote endif Simply adding 1 to the note after the 'else' feels a little arbitrary but I can make it work for the purpose of the project. I realise that the int opcode returns the integer part of the k-rate decimal, so doing the above actually makes 63 (the top of the given random range) more likely. 64 would only be given in the extremely unlikely event that 63.00000 is generated randomly twice in a row haha. Thanks! Kind regards, Ryan On Mon, 9 Mar 2020 at 23:33, Pete Goodeve <pete.goodeve@computer.org> wrote: On Mon, Mar 09, 2020 at 04:08:37PM -0700, I wrote: |
| Date | 2020-03-10 13:39 |
| From | joachim heintz |
| Subject | Re: [Csnd] Sending a different random number with successive triggers |
if you like you may try:
koldnote init 0
if(ktrig==1) then
calculate:
knote random 60, 63.9999
knote = int(knote)
if(knote != koldnote) then
event "i", "plucky", 0, 1, knote
else
kgoto calculate
endif
koldnote = knote
endif
not tested, so perhaps it hangs ...
best -
joachim
On 10/03/2020 14:24, Ryan Jeffares wrote:
> koldnote init 0
>
> if(ktrig==1) then
>
> knote random 60, 63
> knote = int(knote)
>
> if(knote != koldnote) then
> event "i", "plucky", 0, 1, knote
> else
> knote += 1
> event "i", "plucky", 0, 1, knote
> endif
>
> koldnote = knote
>
> endif
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| Date | 2020-03-10 13:43 |
| From | Ryan Jeffares |
| Subject | Re: [Csnd] Sending a different random number with successive triggers |
Hi Joachim, That makes perfect sense, very clever. Thanks a mill Kind regards, Ryan On Tue, 10 Mar 2020 at 13:39, joachim heintz <jh@joachimheintz.de> wrote: if you like you may try: |