Hi All - 

Could I ask the group for a little feedback on a problem I'm noodling on?   My csd is pasted at the end of this mail.

I have an instrument I'm running as a Cabbage-generated vst plugin (bravo, Rory) in Ableton Live. The instrument consists of a delay line (vdelay) and UI to change the delay time and regeneration rate. 

I'm running the orchestra at sr=44100 and kr=882. I expect to get clicks when I change the delaytime. I assume I won't be able to more than 50 clicks a second at this rate (882/44100), true?

If you load this instrument up and play something, if will be kept in the delay line so long as regen is 1. Changing the delay time after the signal is entered changes the point of playback from the delay line, kind of like recording on tape and instantly changing the point of tape playback.

 

I've been playing with ways to smooth out the krate signal here as I change the delay time, but they all introduce weird sound - no what I was picturing. I would like to keep the jumps in the delaytime, but soften the clicks I hear.  

Specifically, I've been using tonek and portk. Part of my problem here is that I'm trying to slow down a signal which controls delaytime, which can affect the pitch of the signal at some point. This is where my mental model starts to break down honestly - I'm a developer for a living but my math is rusty, and my signal processing knowledge needs work. :)

A few questions for the list:

- Any suggestions for ways to smooth the signal out to merely soften the clicks introduced by sudden changes in krate?

- I've been at CSound since 1997, and most of my signal processing understanding comes from experimentation with CSound. Any tutorials/education suggestions (books, online courses) for a self-starter?

Any other feedback appreciated. I used a glitchy version of this instrument alot on this record: http://listenfastermusic.bandcamp.com/album/alkaline

Thanks in advance - 

Ben McAllister | listenfaster.com |  @listenfaster | tuktuband.com

My code:

<Cabbage>

form caption("Glitch Delay") size(620, 130), pluginID("glit")

groupbox text("Glitch Delay"), bounds(0, 0, 620, 100)

rslider channel("delaytime"), bounds(10, 25, 70, 70), text("delaytime"), range(.1, 32, 32), identchannel("WRITEI")

rslider channel("regen"), bounds(70, 25, 70, 70), text("regen"), range(0, 1, 1)

rslider channel("kcf"), bounds(130, 25, 70, 70), text("cf"), range(1, 10000, 10000)

rslider channel("kq"), bounds(200, 25, 70, 70), text("q"), range(.01, 2, .01)

button bounds(280, 25, 70, 70), caption("In"), text("On", "Off"), channel("inputon"), value(0), colour(0,0,0), fontcolour(255,255,255)

button bounds(350, 25, 70, 70), caption("Out"), text("On", "Off"), channel("outputon"), value(0), colour(0,0,0), fontcolour(255,255,255)

button bounds(420, 25, 70, 70), caption("Reinit"), text("Sending", "Send"), channel("reinit"), value(1), colour(0,0,0), fontcolour(255,255,255)

checkbox bounds(500, 25, 120, 70),caption("Host BPM"), text("Lock"), channel("lock"), value(0)

</Cabbage>

<CsoundSynthesizer>

<CsOptions>

-n -d

</CsOptions>

<CsInstruments>

; Initialize the global variables.

sr = 44100

kr = 882

nchnls = 2

garegensig1 init 0

garegensig2 init 0

instr 1

kdelaytime chnget "delaytime"

kregen chnget "regen"

kinputon chnget "inputon"

koutputon chnget "outputon"

kcf chnget "kcf"

kq chnget "kq"

kbpm chnget "HOST_BPM"

klock chnget "lock"

if klock = 0 kgoto no_lock

printks "locked\\n", 10

kdelaytime = (60/kbpm)

chnset kdelaytime, "delaytime"

printks "%d\\n", 10, kdelaytime

no_lock:

ainputsig1 = 0

ainputsig2 = 0

if kinputon = 1 kgoto noread

ainputsig1,ainputsig2   inch 1,2

; I've also tried tonek here, setting the second argument between 882 and 1

kdelaytime portk kdelaytime, kq

noread:

asig1 = ainputsig1 +  (garegensig1 * kregen)

asig2 = ainputsig2 +  (garegensig2 * kregen)

kgoto done

noadd:

done:

aout1 vdelay asig1, kdelaytime*1000, 32*1000

aout2 vdelay asig2, kdelaytime*1000, 32*1000

garegensig1 = aout1

garegensig2 = aout2

if koutputon = 1 kgoto off

read:

outs aout1,aout2

off:

endin

</CsInstruments>  

<CsScore>

f1 0 4096 10 1

i1 0 1000

</CsScore>

</CsoundSynthesizer>

 

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..and try vdelayx instead of vdelay. It has smoother delaytime interpolation.

yes, that’s right and the a( ) function uses interp, so you can use either.
========================
Dr Victor Lazzarini
Dean of Arts, Celtic Studies and Philosophy,
Maynooth University,
Maynooth, Co Kildare, Ireland
Tel: 00 353 7086936
Fax: 00 353 1 7086952 

> On 2 Oct 2015, at 05:47, Iain McCurdy  wrote:
> 
> Converting k to a-rate using the interp opcode should improve smoothness without causing response sluggishness. 
> 
> Date: Fri, 2 Oct 2015 06:08:00 +0200
> From: oyvind.brandtsegg@ntnu.no
> To: csound-users@lists.sourceforge.net
> Subject: Re: [Csnd] Smoothing out krate signals?
> 
> ..and try vdelayx instead of vdelay. It has smoother delaytime interpolation.
> 1. okt. 2015 20.58 skrev "Victor Lazzarini" :
> Would it help to convert the signal into audio rate using a(), then passing it through a tone filter with a low frequency, like 10hz?
> 
> Victor Lazzarini
> Dean of Arts, Celtic Studies, and Philosophy
> Maynooth University
> Ireland
> 
> On 1 Oct 2015, at 18:35, Ben McAllister  wrote:
> 
> Hi All - 
> 
> Could I ask the group for a little feedback on a problem I'm noodling on?   My csd is pasted at the end of this mail.
> 
> I have an instrument I'm running as a Cabbage-generated vst plugin (bravo, Rory) in Ableton Live. The instrument consists of a delay line (vdelay) and UI to change the delay time and regeneration rate. 
> 
> I'm running the orchestra at sr=44100 and kr=882. I expect to get clicks when I change the delaytime. I assume I won't be able to more than 50 clicks a second at this rate (882/44100), true?
> 
> If you load this instrument up and play something, if will be kept in the delay line so long as regen is 1. Changing the delay time after the signal is entered changes the point of playback from the delay line, kind of like recording on tape and instantly changing the point of tape playback.
>  
> I've been playing with ways to smooth out the krate signal here as I change the delay time, but they all introduce weird sound - no what I was picturing. I would like to keep the jumps in the delaytime, but soften the clicks I hear.  
> 
> Specifically, I've been using tonek and portk. Part of my problem here is that I'm trying to slow down a signal which controls delaytime, which can affect the pitch of the signal at some point. This is where my mental model starts to break down honestly - I'm a developer for a living but my math is rusty, and my signal processing knowledge needs work. :)
> 
> A few questions for the list:
> 
> - Any suggestions for ways to smooth the signal out to merely soften the clicks introduced by sudden changes in krate?
> 
> - I've been at CSound since 1997, and most of my signal processing understanding comes from experimentation with CSound. Any tutorials/education suggestions (books, online courses) for a self-starter?
> 
> Any other feedback appreciated. I used a glitchy version of this instrument alot on this record: http://listenfastermusic.bandcamp.com/album/alkaline
> 
> Thanks in advance - 
> Ben McAllister | listenfaster.com |  @listenfaster | tuktuband.com
> 
> My code:
> 
> 
> form caption("Glitch Delay") size(620, 130), pluginID("glit")
> groupbox text("Glitch Delay"), bounds(0, 0, 620, 100)
> rslider channel("delaytime"), bounds(10, 25, 70, 70), text("delaytime"), range(.1, 32, 32), identchannel("WRITEI")
> rslider channel("regen"), bounds(70, 25, 70, 70), text("regen"), range(0, 1, 1)
> rslider channel("kcf"), bounds(130, 25, 70, 70), text("cf"), range(1, 10000, 10000)
> rslider channel("kq"), bounds(200, 25, 70, 70), text("q"), range(.01, 2, .01)
> button bounds(280, 25, 70, 70), caption("In"), text("On", "Off"), channel("inputon"), value(0), colour(0,0,0), fontcolour(255,255,255)
> button bounds(350, 25, 70, 70), caption("Out"), text("On", "Off"), channel("outputon"), value(0), colour(0,0,0), fontcolour(255,255,255)
> button bounds(420, 25, 70, 70), caption("Reinit"), text("Sending", "Send"), channel("reinit"), value(1), colour(0,0,0), fontcolour(255,255,255)
> checkbox bounds(500, 25, 120, 70),caption("Host BPM"), text("Lock"), channel("lock"), value(0)
> 
> 
> 
> -n -d
> 
> 
> ; Initialize the global variables.
> sr = 44100
> kr = 882
> nchnls = 2
> 
> garegensig1 init 0
> garegensig2 init 0
> 
> instr 1
> kdelaytime chnget "delaytime"
> kregen chnget "regen"
> kinputon chnget "inputon"
> koutputon chnget "outputon"
> kcf chnget "kcf"
> kq chnget "kq"
> kbpm chnget "HOST_BPM"
> klock chnget "lock"
> 
> if klock = 0 kgoto no_lock
> printks	"locked\\n", 10
> kdelaytime = (60/kbpm)
> chnset kdelaytime, "delaytime"
> printks	"%d\\n", 10, kdelaytime
> no_lock:
> 
> 
> ainputsig1 = 0
> ainputsig2 = 0
> if kinputon = 1 kgoto noread
> ainputsig1,ainputsig2  		inch 1,2
> 
> ; I've also tried tonek here, setting the second argument between 882 and 1
> kdelaytime portk kdelaytime, kq
> 
> 
> noread:
> asig1 = ainputsig1 +  (garegensig1 * kregen)
> asig2 = ainputsig2 +  (garegensig2 * kregen)
> kgoto done
> noadd:
> done:
> aout1 vdelay	asig1, kdelaytime*1000, 32*1000
> aout2 vdelay	asig2, kdelaytime*1000, 32*1000
> garegensig1 = aout1
> garegensig2 = aout2
> if 	koutputon = 1	kgoto off
> read:
> outs	aout1,aout2
> off:
> endin
> 
>   
> 
> f1 0 4096 10 1
> i1 0 1000
> 
> 
> 
>  
> ------------------------------------------------------------------------------
> _______________________________________________
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>        https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here
> 
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> Csound-users@lists.sourceforge.net
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> Send bugs reports to
>         https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here
> 
> 
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Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here