Re: Re: [Csnd] UDO to have the max a signal amplitude as k variable

Date	2013-08-23 10:33
From	"vallste@libero.it"
Subject	Re: Re: [Csnd] UDO to have the max a signal amplitude as k variable
	Hi Joachim, this seems what I was looking for. Just one small doubt: if I set ktrig to a constant 1 (no metro triggering or similar stuff) the output will be the max reached in every kcycle, right? >----Messaggio originale---- >Da: jh@joachimheintz.de >Data: 23/08/2013 9.52 >A: >Ogg: Re: [Csnd] UDO to have the max a signal amplitude as k variable > >hi stefano - > >i think no udo is needed here because max_k does what you wish?! > >best - > > joachim > > >Am 22.08.2013 23:42, schrieb vallste@libero.it: >> Hello, >> >> I'm developing this udo to have a krate variable indicating the maximum >> value reached by a a-rate signal during a k-cycle. >> >> As far as I've understood downsamp opcode performs some averaging >> (please correct me if I'm wrong) so not using it since I want the >> absolute maximum reached. >> >> >> opcode MaxAmpInKCycle, k, ak >> setksmps 1 >> ain, kperiod xin ;ain - input signal, kperiod = kspms >> kcounter init 0 ;count from 0 to ksmps >> kout init 0 ;output value >> aamp = abs(ain) >> kamp downsamp aamp >> ;if above previous value update >> kout = (kamp > kout ? kamp : kout) >> kcounter = kcounter + 1 >> if kcounter == kperiod then >> ;reset value and counter >> ;when reaching ksmps >> kout = 0 >> kcounter = 0 >> endif >> printk2 kcounter ; for testing >> printk ksmps / sr, kout ; for testing >> xout kout >> endop >> >> >> Not sure if it's working as expected, by printing values looks like that >> the program using this opcode >> >> >> instr 1 >> >> ainLH, ainRH diskin2 $INPUTFILE, 1, 0, 1 >> printk ksmps / sr, 123 >> kvalue MaxAmpInKCycle ainLH, 8 ; equal to ksmps >> printk ksmps / sr, 456 >> printk ksmps / sr, kvalue >> printk ksmps / sr, 789 >> >> endin >> >> >> is somehow out of phase: after having printed 789 (from the main >> program), kcounter variable value (printed from inside the opcode) is >> not 0 (don't know if caused by some kind of "printing buffer") so if >> someone want give it a try/report results/find errors/have an idea of >> what's happening and want to share is more than welcome. >> >> >> I'm using 5.17 double from Ubuntu repository >> >> >> Bye >> >> Stefano >> > > >Send bugs reports to the Sourceforge bug trackers >csound6: > https://sourceforge.net/p/csound/tickets/ >csound5: > https://sourceforge.net/p/csound/bugs/ >Discussions of bugs and features can be posted here >To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound" > > >

Date	2013-08-23 11:41
From	joachim heintz
Subject	Re: [Csnd] UDO to have the max a signal amplitude as k variable
	no, but it is easy to get a trigger which increments in each k-period: -n ksmps = 32 instr 1 kTrig init 1 aSig rnd31 1, 0 kMax max_k aSig, 1, 1 printk 0, kMax kTrig = kTrig+1 endin i 1 0 .01 regards - joachim Am 23.08.2013 11:33, schrieb vallste@libero.it: > Hi Joachim, > this seems what I was looking for. Just one small doubt: if I set ktrig to a > constant 1 (no metro triggering or similar stuff) the output will be the max > reached in every kcycle, right? > >> ----Messaggio originale---- >> Da: jh@joachimheintz.de >> Data: 23/08/2013 9.52 >> A: >> Ogg: Re: [Csnd] UDO to have the max a signal amplitude as k variable >> >> hi stefano - >> >> i think no udo is needed here because max_k does what you wish?! >> >> best - >> >> joachim >> >> >> Am 22.08.2013 23:42, schrieb vallste@libero.it: >>> Hello, >>> >>> I'm developing this udo to have a krate variable indicating the maximum >>> value reached by a a-rate signal during a k-cycle. >>> >>> As far as I've understood downsamp opcode performs some averaging >>> (please correct me if I'm wrong) so not using it since I want the >>> absolute maximum reached. >>> >>> >>> opcode MaxAmpInKCycle, k, ak >>> setksmps 1 >>> ain, kperiod xin ;ain - input signal, kperiod = kspms >>> kcounter init 0 ;count from 0 to ksmps >>> kout init 0 ;output value >>> aamp = abs(ain) >>> kamp downsamp aamp >>> ;if above previous value update >>> kout = (kamp > kout ? kamp : kout) >>> kcounter = kcounter + 1 >>> if kcounter == kperiod then >>> ;reset value and counter >>> ;when reaching ksmps >>> kout = 0 >>> kcounter = 0 >>> endif >>> printk2 kcounter ; for testing >>> printk ksmps / sr, kout ; for testing >>> xout kout >>> endop >>> >>> >>> Not sure if it's working as expected, by printing values looks like that >>> the program using this opcode >>> >>> >>> instr 1 >>> >>> ainLH, ainRH diskin2 $INPUTFILE, 1, 0, 1 >>> printk ksmps / sr, 123 >>> kvalue MaxAmpInKCycle ainLH, 8 ; equal to ksmps >>> printk ksmps / sr, 456 >>> printk ksmps / sr, kvalue >>> printk ksmps / sr, 789 >>> >>> endin >>> >>> >>> is somehow out of phase: after having printed 789 (from the main >>> program), kcounter variable value (printed from inside the opcode) is >>> not 0 (don't know if caused by some kind of "printing buffer") so if >>> someone want give it a try/report results/find errors/have an idea of >>> what's happening and want to share is more than welcome. >>> >>> >>> I'm using 5.17 double from Ubuntu repository >>> >>> >>> Bye >>> >>> Stefano >>> >> >> >> Send bugs reports to the Sourceforge bug trackers >> csound6: >> https://sourceforge.net/p/csound/tickets/ >> csound5: >> https://sourceforge.net/p/csound/bugs/ >> Discussions of bugs and features can be posted here >> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe > csound" >> >> >> > > > > > Send bugs reports to the Sourceforge bug trackers > csound6: > https://sourceforge.net/p/csound/tickets/ > csound5: > https://sourceforge.net/p/csound/bugs/ > Discussions of bugs and features can be posted here > To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound" > > >

Date	2013-08-23 12:09
From	Victor Lazzarini
Subject	Re: [Csnd] UDO to have the max a signal amplitude as k variable
	kTrig is not being consumed in the code. Is that right? On 23 Aug 2013, at 11:41, joachim heintz wrote: > no, but it is easy to get a trigger which increments in each k-period: > > > > -n > > > ksmps = 32 > instr 1 > kTrig init 1 > aSig rnd31 1, 0 > kMax max_k aSig, 1, 1 > printk 0, kMax > kTrig = kTrig+1 > endin > > > i 1 0 .01 > > > > > regards - > > joachim > > > Am 23.08.2013 11:33, schrieb vallste@libero.it: >> Hi Joachim, >> this seems what I was looking for. Just one small doubt: if I set ktrig to a >> constant 1 (no metro triggering or similar stuff) the output will be the max >> reached in every kcycle, right? >> >>> ----Messaggio originale---- >>> Da: jh@joachimheintz.de >>> Data: 23/08/2013 9.52 >>> A: >>> Ogg: Re: [Csnd] UDO to have the max a signal amplitude as k variable >>> >>> hi stefano - >>> >>> i think no udo is needed here because max_k does what you wish?! >>> >>> best - >>> >>> joachim >>> >>> >>> Am 22.08.2013 23:42, schrieb vallste@libero.it: >>>> Hello, >>>> >>>> I'm developing this udo to have a krate variable indicating the maximum >>>> value reached by a a-rate signal during a k-cycle. >>>> >>>> As far as I've understood downsamp opcode performs some averaging >>>> (please correct me if I'm wrong) so not using it since I want the >>>> absolute maximum reached. >>>> >>>> >>>> opcode MaxAmpInKCycle, k, ak >>>> setksmps 1 >>>> ain, kperiod xin ;ain - input signal, kperiod = kspms >>>> kcounter init 0 ;count from 0 to ksmps >>>> kout init 0 ;output value >>>> aamp = abs(ain) >>>> kamp downsamp aamp >>>> ;if above previous value update >>>> kout = (kamp > kout ? kamp : kout) >>>> kcounter = kcounter + 1 >>>> if kcounter == kperiod then >>>> ;reset value and counter >>>> ;when reaching ksmps >>>> kout = 0 >>>> kcounter = 0 >>>> endif >>>> printk2 kcounter ; for testing >>>> printk ksmps / sr, kout ; for testing >>>> xout kout >>>> endop >>>> >>>> >>>> Not sure if it's working as expected, by printing values looks like that >>>> the program using this opcode >>>> >>>> >>>> instr 1 >>>> >>>> ainLH, ainRH diskin2 $INPUTFILE, 1, 0, 1 >>>> printk ksmps / sr, 123 >>>> kvalue MaxAmpInKCycle ainLH, 8 ; equal to ksmps >>>> printk ksmps / sr, 456 >>>> printk ksmps / sr, kvalue >>>> printk ksmps / sr, 789 >>>> >>>> endin >>>> >>>> >>>> is somehow out of phase: after having printed 789 (from the main >>>> program), kcounter variable value (printed from inside the opcode) is >>>> not 0 (don't know if caused by some kind of "printing buffer") so if >>>> someone want give it a try/report results/find errors/have an idea of >>>> what's happening and want to share is more than welcome. >>>> >>>> >>>> I'm using 5.17 double from Ubuntu repository >>>> >>>> >>>> Bye >>>> >>>> Stefano >>>> >>> >>> >>> Send bugs reports to the Sourceforge bug trackers >>> csound6: >>> https://sourceforge.net/p/csound/tickets/ >>> csound5: >>> https://sourceforge.net/p/csound/bugs/ >>> Discussions of bugs and features can be posted here >>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe >> csound" >>> >>> >>> >> >> >> >> >> Send bugs reports to the Sourceforge bug trackers >> csound6: >> https://sourceforge.net/p/csound/tickets/ >> csound5: >> https://sourceforge.net/p/csound/bugs/ >> Discussions of bugs and features can be posted here >> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound" >> >> >> > > > Send bugs reports to the Sourceforge bug trackers > csound6: > https://sourceforge.net/p/csound/tickets/ > csound5: > https://sourceforge.net/p/csound/bugs/ > Discussions of bugs and features can be posted here > To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound" > > Dr Victor Lazzarini Senior Lecturer Dept. of Music NUI Maynooth Ireland tel.: +353 1 708 3545 Victor dot Lazzarini AT nuim dot ie